Bathroom Remodel Permit in Northbrook, IL (2026)

Research by DoINeedAPermit Research Team · Updated May 2026

The Short Answer

A full bathroom remodel in Northbrook requires a permit if you're relocating plumbing fixtures, adding electrical circuits, converting a tub to shower (or vice versa), installing a new exhaust fan, or moving walls. Surface-only cosmetic work—tile, vanity swap in place, faucet replacement—does not need a permit.

Northbrook adopted the 2021 International Building Code and enforces it through the City of Northbrook Building Department, which operates its own review and inspection process separate from the village of Evanston or the city of Chicago. What sets Northbrook apart is its strict enforcement of the waterproofing assembly specification upfront: the department will not issue a permit for any tub-to-shower conversion or new shower installation without a detailed shower-assembly drawing showing the membrane type (sheet membrane, liquid-applied, or mortar-bed), the substrate (cement board, waterproof drywall, etc.), and the transition details at the curb and threshold. Many homeowners in neighboring Wilmette or Glenview can get away with a handwritten note; Northbrook demands a sealed drawing or a manufacturer's installation detail sheet as part of the permit application. Additionally, Northbrook's Building Department requires all bathroom electrical work to include an AFCI/GFCI protection schedule on the electrical plan—not just a verbal promise—which adds complexity to permit submittals. The frost depth in Northbrook is 42 inches (Chicago standard), which affects any below-slab plumbing work, and the Building Department enforces trap-arm slope and length rules (IRC P2706) aggressively, rejecting permits that don't show the drain routing clearly. Plan review typically takes 2–3 weeks for a standard remodel.

What happens if you skip the permit (and you needed one)

Northbrook Building Department issues stop-work orders on unpermitted bathroom work and levies a $250–$500 fine per violation, plus you must pull a permit retroactively and pay double the original permit fee ($400–$1,600 depending on valuation).
Insurance claims for water damage from an unpermitted shower conversion or plumbing relocation are routinely denied; your homeowner's policy exclusion clause covers 'work performed without required permits.'
At resale, an unpermitted bathroom remodel triggers a mandatory seller's disclosure hit in Illinois; buyers and lenders will demand proof of permits or a retroactive engineer's inspection (often $1,500–$3,000) or price concessions of $10,000–$25,000.
Unpermitted electrical work in a bathroom (GFCI/AFCI circuits) can trigger lender refinance rejection and FHA/VA appraisal holds, costing months of delay and forcing you to obtain permits before closing.

Northbrook bathroom remodel permits—the key details

The primary trigger for a bathroom remodel permit in Northbrook is any change to the location of fixtures, the scope of electrical service, the drainage routing, or the waterproofing assembly. Per the 2021 IBC Section P2706 (adopted by Northbrook), any relocation of a toilet, sink, or shower valve requires verification that the new drain line does not exceed a trap-arm length of 5 feet (or longer, depending on pipe size), and that the slope is maintained at 1/4 inch per foot minimum. The Northbrook Building Department specifically requires a plumbing plan drawing (not just a verbal description) showing the existing drain, the new drain route, the trap location, and the cleanout placement. This is non-negotiable; permits are routinely returned for 'no drain route shown.' If you are converting a tub to a shower or installing a new shower, Northbrook demands a sealed waterproofing-assembly detail that complies with IRC R702.4.2. This detail must show substrate type (cement board or waterproof drywall), membrane type (sheet membrane per ASTM E96, liquid-applied per ASTM C834, or mortar bed), and transitions at the curb, threshold, and fixture penetrations. The department's permit application includes a waterproofing-assembly checklist; if you do not provide the detail, the permit will be returned within 5 business days marked 'incomplete.' Many homeowners assume they can omit this and 'figure it out in the field'—that assumption is false in Northbrook.

Electrical work in a bathroom remodel is tightly regulated and is the second major permit trigger. Per NEC Article 210.8(A) (adopted into Northbrook code via the 2021 IBC), all general-use receptacles within 6 feet of the sink or tub/shower must be protected by a ground-fault circuit interrupter (GFCI); if the remodel adds a new outlet or circuit, GFCI protection becomes a permit requirement and must be shown on an electrical plan. Similarly, if the remodel involves any wall-adjacent lights, fans, or switched loads, the Northbrook Building Department requires an arc-fault circuit interrupter (AFCI) protection plan for the bathroom branch circuit. A common rejection reason is a permit application that states 'GFCI outlet to be installed' without showing where on the circuit diagram. Northbrook wants to see the receptacle, the breaker, and the protection method (outlet-level GFCI vs. breaker-level GFCI) marked clearly. If you are adding a new exhaust fan (which is common in a full remodel), IRC M1505 requires that the duct be no smaller than 3 or 4 inches (depending on CFM), slope no less than 1/8 inch per foot, and terminate to the outside air (not into an attic or soffit). The permit application must include the duct routing, the termination location, and the CFM rating of the fan; this detail is frequently overlooked and causes permits to be returned.

Waterproofing and ventilation standards are the third critical area, and Northbrook enforces them during the rough-in and final inspections. If a tub-to-shower conversion is part of the remodel, the inspector will require that the shower curb be no less than 2 inches high and no more than 9 inches, and that the membrane extend a minimum of 6 inches up the wall (or per manufacturer's spec if higher). Many homeowners use corner-bead-only at the tub-shower transition, assuming caulk will seal it; Northbrook's inspector will reject this and demand a proper membrane overlap. For the exhaust fan, Northbrook's Building Department enforces the 'no damper unless required by climate' rule; if your duct terminates through the roof, a damper is permitted but not mandatory in Chicago-area climate (5A), though many inspectors recommend it for energy efficiency. The duct cannot be disconnected or kinked, and cannot exceed 35 feet in length (or per manufacturer's spec) without a booster fan. This is checked during the rough-in and final inspections.

The permit application process in Northbrook requires you to submit either a full set of construction drawings (for major remodels involving walls or new fixtures) or a simplified remodel permit form (for cosmetic or fixture-swap work). If you are moving fixtures, adding electrical, or changing the waterproofing assembly, you must submit a plumbing plan and electrical plan. The Building Department's online portal (accessible via the City of Northbrook website) allows e-filing of permits, but many contractors still file in person at City Hall to avoid rejection delays. The department staff are known for strict interpretation of the code; they will not grant 'substantial compliance' easily and will return permits marked 'incomplete' if the waterproofing detail, drain routing, or electrical protection schedule is missing or unclear. Plan-review time is typically 2–3 weeks for a standard full bathroom remodel; expedited review (1 week) is available for an additional $150–$200 fee, though this is rare for bathroom work. Once the permit is issued, you will have 180 days to begin work and up to 1 year to complete it (renewable by request).

Inspections for a full bathroom remodel in Northbrook typically include a rough-plumbing inspection (after pipes are in place but before drywall), a rough-electrical inspection (after circuits and outlets are roughed in), a framing inspection (if walls are moved), and a final inspection (after all work is complete, waterproofing is sealed, and fixtures are installed). The rough-plumbing inspector will verify trap locations, drain slope, cleanout placement, and vent routing. The rough-electrical inspector will check GFCI/AFCI protection, outlet placement, and circuit amperage. The final inspector will verify waterproofing, caulking, grout, fixture installation, exhaust-fan termination, and code compliance. If the bathroom is in a pre-1978 home, lead-paint rules (Illinois RRP Rule) also apply: any painted surfaces being disturbed must be tested for lead, and if lead is found, a certified lead-abatement contractor must be hired—this is a separate requirement from the building permit but often discovered during permit review. The Northbrook Building Department does not conduct lead tests, but they may refer you to the Cook County Health Department if pre-1978 concerns arise.

Three Northbrook bathroom remodel (full) scenarios

Scenario A

Master bathroom vanity and toilet relocated, new wall-mounted sink and toilet flange in Northbrook colonial, no tub conversion

You are remodeling a 1995 colonial in central Northbrook and moving the toilet from the east wall to the west wall, and relocating the sink 3 feet to the north. The tub stays in place. This is a classic fixture-relocation scenario that requires a permit. You must submit a plumbing plan showing the existing toilet trap, the new toilet trap location, the trap arm length (measured from the trap weir to the vent), and the new drain routing. In Northbrook's climate (42-inch frost depth, glacial-till soil), any drain line that terminates below the frost line in a basement or crawl space must be sloped correctly and vented within code limits. The new toilet flange will likely require a new 3-inch ABS or PVC vent line, which must be shown on the drawing. The sink drain is typically 1.5 inches, and the trap arm must not exceed 3.5 feet in length per IRC P2706; the plumbing plan must show this measurement. The electrical portion is minimal if you are not adding outlets, but if you are adding a lighting fixture or heated-mirror outlet, GFCI protection must be shown on an electrical plan. The permit fee in Northbrook is typically $300–$500 based on a valuation of $15,000–$25,000 (bathroom remodels are often valued at $150–$200 per square foot). Plan review takes 2–3 weeks. Rough-plumbing inspection is required once the pipes are in place; the inspector will verify trap locations, slope, and vent connections. A final inspection follows once fixtures are installed. Timeline: permit issued in 3 weeks, rough inspection within 5 business days of request, final inspection within 5 business days of completion. Total cost estimate: $300–$500 permit fee, $8,000–$15,000 labor and materials.

Scenario B

Tub-to-shower conversion with new tile and waterproofing assembly in Northbrook ranch, no fixture relocation

You are converting an existing 5x8-foot bathtub to a walk-in shower in a 1970 ranch in Northbrook. The shower valve, drain, and plumbing lines remain in their original locations, but the waterproofing assembly changes from a tub surround (tile over substrate) to a full shower enclosure (tile over membrane). This triggers a permit because the waterproofing assembly and drainage system change per IRC R702.4.2. You must submit a waterproofing detail drawing or manufacturer's installation sheet that specifies the shower curb (2–9 inches high), the membrane type (sheet membrane such as chlorinated polyethylene, liquid-applied urethane, or mortar bed with pan liner), the substrate (cement board or waterproof drywall such as Kerdi or HardieBacker), and the transitions at the curb threshold and fixture penetrations (handle, spout, showerhead). Northbrook's Building Department will not issue a permit without this detail; many applicants attempt to submit a photo or a contractor's verbal description, which is rejected. The detail can come from the tile contractor's spec sheet, a waterproofing manufacturer's technical guide, or a sealed drawing by a plumber or designer. The curb drain must be sized correctly (typically 2-inch PVC minimum) and slope to the main drain at 1/4 inch per foot. The vent stack for the shower drain must be shown; if the existing vent is adequate (within 5 feet of the trap), no new vent is required, but the permit application must confirm this. Electrical is typically minimal for a tub-to-shower (no new circuits if the light and exhaust fan are existing), but if a heated-floor mat or new lighting is added, GFCI protection must be shown. The permit fee in Northbrook is typically $250–$400 based on a valuation of $8,000–$15,000. Plan review is 2–3 weeks. Inspections include rough-plumbing (after curb and drain are set, before waterproofing), and final inspection (after waterproofing and tile are complete). The rough-plumbing inspector will verify the curb height, drain slope, vent connection, and trap location. The final inspector will verify the waterproofing seal, caulking, grout, and overall finish. Timeline: permit issued in 3 weeks, rough-plumbing inspection within 5 business days, final inspection within 5 business days. Total cost estimate: $250–$400 permit fee, $10,000–$20,000 labor and materials (tile, waterproofing, curb construction).

Scenario C

New exhaust fan with duct routing, GFCI outlet added, vanity replaced in-place in Northbrook split-level

You are remodeling a 1980s split-level bathroom and adding a new 100-CFM exhaust fan with a 4-inch insulated duct that vents through the roof (new penetration). You are also adding a GFCI-protected outlet on the counter for a heated mirror or grooming appliance. The vanity is replaced in the same footprint, and the toilet remains in place. The new exhaust fan and the new electrical outlet are the permit triggers; the vanity swap in place is exempt. For the exhaust fan, you must submit a plan showing the duct routing from the bathroom (ceiling mounted) through the attic to the roof penetration, the duct diameter (4 inches for 100 CFM), the slope (minimum 1/8 inch per foot), the termination location (roof vent hood or soffit cap, but not soffit in conditioned attic), and the CFM rating of the fan. Per IRC M1505, the duct cannot have dampers in Northbrook's 5A climate zone (though some inspectors recommend them for energy savings). The duct length is typically under 35 feet in a single-story ranch, so a booster fan is not required. The plan must also show that the duct is not kinked, not spliced with duct tape (metal clamps and mastic sealant only), and terminates outside the conditioned space. The electrical portion requires a plan showing the new GFCI outlet location (within 6 feet of the sink per NEC 210.8), the circuit protection (either GFCI breaker or GFCI outlet), and the wire gauge and circuit amperage. If the new outlet is on the same circuit as existing bathroom outlets, GFCI protection via the breaker is often the simplest approach. If it is on a new circuit, a 20-amp GFCI breaker is typical. The Northbrook Building Department requires that the electrical plan show the protection method; verbal assurance is not acceptable. The permit fee in Northbrook is typically $275–$450 based on a valuation of $10,000–$18,000. Plan review is 2–3 weeks. Inspections include rough-electrical (after wiring and outlets are in place), rough-plumbing (if drain work is done, otherwise skipped), and final inspection. The rough-electrical inspector will verify the GFCI outlet location, the circuit protection, and wire gauge. The final inspector will verify the exhaust fan installation, the duct termination (visual and photographic proof often required), the caulking around the roof penetration, and the grounding of the fan frame. Timeline: permit issued in 3 weeks, rough-electrical inspection within 5 business days, final inspection within 5 business days. Total cost estimate: $275–$450 permit fee, $2,500–$5,000 labor and materials (fan, duct, electrical outlet).

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Waterproofing assembly specifications in Northbrook: why the detail matters

Northbrook's Building Department enforcement of waterproofing specifications is driven by climate and soil conditions. The city sits in a glacial-till zone with high water tables in many neighborhoods; spring groundwater infiltration and humid basement air are common problems. When a tub-to-shower conversion or new shower is installed without a proper waterproofing assembly, water migrates into the wall cavity, causing mold, rot, and structural damage. The Building Department learned this lesson decades ago after costly damage claims; now they require detailed specification of the membrane type upfront. The three approved systems are sheet membrane (chlorinated polyethylene, EPDM, or PVC, typically 40–60 mil thickness), liquid-applied membrane (urethane or acrylic, typically 2–3 coats at 60–80 mils total), and mortar-bed pan liner (traditional method, using a pre-slope and a rubber pan). Each system has different installation requirements, and the inspector will verify that the contractor has followed the spec exactly. Sheet membranes must overlap seams by 3–4 inches and be sealed with compatible adhesive. Liquid-applied membranes must cure for 24–48 hours before tile is applied. Mortar-bed pans must be sloped 1/4 inch per foot and sealed at all transitions.

The most common rejection reason in Northbrook permit applications is submitting a shower design without specifying the waterproofing system. The applicant will draw a tile surround and a curb but will not say whether it is cement board plus sheet membrane, waterproof drywall plus liquid-applied membrane, or a traditional pan-lined system. The Northbrook inspector will return the permit marked 'incomplete: specify waterproofing assembly per IRC R702.4.2.' To avoid this, include a manufacturer's product datasheet (e.g., Schluter-Systems Kerdi or Johns Manville Hydroduct), a sealed detail drawing by a plumber or designer, or a written spec from the tile contractor stating the substrate, membrane, and installation method. The permit application includes a waterproofing checklist; check every box and attach the detail. Some homeowners in Northbrook have successfully obtained permits by submitting a photo of the Tile Council of North America (TCNA) handbook or the International Building Code Section R702.4 highlighted with the approved system circled; this is less preferred than a sealed drawing, but it has been accepted if the system choice is explicit.

Cost implications: a proper waterproofing assembly adds $1,500–$3,500 to a shower conversion (for materials and labor), depending on size and system choice. Sheet-membrane systems are mid-range in cost and most common in residential work. Liquid-applied membranes are typically slightly cheaper and faster to install but require precise mixing and cure times. Mortar-bed systems are more labor-intensive and require skilled installation but offer excellent durability and are common in high-end homes. Northbrook inspectors do not favor one system over another; they simply require that the spec be stated and followed. During the final inspection, the inspector will ask to see the membrane (before tile is applied) or will require photographic proof of installation. If the tile has already been applied, the inspector may require that a small section be removed to verify the membrane; this can add cost and delay. Plan accordingly: complete the waterproofing assembly inspection before tiling begins.

Electrical protection for bathroom circuits in Northbrook: GFCI vs. AFCI

Northbrook adopted the 2021 National Electrical Code (NEC) Article 210.8 for ground-fault circuit interrupter (GFCI) protection and Article 210.12 for arc-fault circuit interrupter (AFCI) protection in bathrooms. GFCI protection is required for all receptacles (outlets) within 6 feet of the sink or tub/shower per NEC 210.8(A)(1). This includes the vanity outlets, countertop outlets, and any other general-use outlet in the bathroom. GFCI protection can be provided by a GFCI outlet (receptacle-level protection, cost ~$20–$40) or by a GFCI breaker (circuit-level protection, cost ~$60–$100). A common mistake is installing a regular outlet near the sink without GFCI protection and assuming the homeowner will use a GFCI-rated plug strip; the code does not allow this. A GFCI device (outlet or breaker) must be installed. If the bathroom is part of a larger remodel involving bedroom walls or hallways, AFCI protection may also be required per NEC 210.12(B). AFCI breakers protect against arc faults (dangerous intermittent arcs in wiring) and are required for all branch circuits in bedrooms and bathrooms in new construction; in remodels, AFCI protection is required if existing circuits are modified or if new circuits are added. Northbrook's Building Department is strict about this: the permit application must show the circuit protection method (GFCI outlet, GFCI breaker, AFCI breaker, or combination AFCI/GFCI breaker) on an electrical plan or schedule.

The Northbrook Building Department rejection reason is often: 'no circuit protection schedule shown' or 'GFCI outlet installation planned but not confirmed on electrical drawing.' To avoid this, submit an electrical plan that shows the bathroom layout, the outlet and fixture locations, the circuit number, the breaker amperage, and the protection method. If you are using a GFCI outlet, label it 'GFCI protected outlet.' If you are using a GFCI breaker, label the circuit 'protected by GFCI breaker' and identify the breaker number in the panel. If the bathroom has both plumbing (sink, toilet) and a heated-mirror outlet or fan switch, the protection method must address both general-use outlets (GFCI) and lighting/fan circuits (AFCI if required). A licensed electrician or an electrical designer can generate this plan; cost is typically $150–$300. If you are comfortable with basic electrical drawing, you can create the plan yourself using a template (many online resources are available). The Northbrook Building Department online permit portal allows e-filing of permits with attached electrical plans; submitting digitally is faster than in-person filing and reduces rejection delays.

During the rough-electrical inspection, the Northbrook inspector will verify that GFCI/AFCI devices are installed correctly, that the outlets are positioned within 6 feet of the sink, and that the circuit protection is as shown on the permit plan. The inspector will test GFCI outlets with a test button to confirm operation; failure to test will result in a failed inspection and rework. During the final inspection, the inspector will re-test GFCI outlets and verify that all cover plates are installed. If GFCI protection is missing or incorrect, the inspection will be failed, and the permit holder will be required to correct the issue and request a re-inspection (additional fee ~$50–$75). Plan accordingly: ensure that the electrician understands the GFCI/AFCI requirements before work begins, and verify on-site that devices are installed and tested before requesting the rough-electrical inspection.

City of Northbrook Building Department
City Hall, 1225 Cedar Lane, Northbrook, IL 60062
Phone: (847) 272-5050 | https://www.northbrook.il.us/building-and-code-compliance
Monday–Friday, 8:00 AM–5:00 PM (closed major holidays; verify before visiting)

Common questions

Can I do a bathroom remodel without a permit if I hire a licensed contractor?

No. Northbrook requires a permit for any bathroom remodel that involves fixture relocation, electrical circuit changes, exhaust-fan installation, or waterproofing-assembly changes—regardless of whether you hire a contractor or do the work yourself. The contractor is required to help you obtain the permit as part of the project scope. If the contractor skips the permit, you (the homeowner) are liable for stop-work fines and retroactive permit fees. Always verify that the contractor has applied for and obtained the permit before work begins.

Is vanity replacement in place a permit-exempt project in Northbrook?

Yes, replacing a vanity in the same location with the same plumbing connections is typically exempt from permitting in Northbrook, provided no electrical outlets are added. If you are replacing a vanity but keeping the faucet connection and drain in the same location, and no new electrical work is involved, no permit is required. However, if the new vanity includes a heated-mirror outlet or lighting fixture that requires new wiring, a permit is needed for the electrical portion.

What is the typical permit fee for a full bathroom remodel in Northbrook?

Bathroom remodel permit fees in Northbrook are based on the estimated project valuation, typically charged at 1.5–2% of valuation. A standard full remodel (fixtures relocated, waterproofing, new exhaust fan, electrical) is valued at $15,000–$25,000, resulting in a permit fee of $250–$500. A minor remodel (exhaust fan only, no fixture moves) may be valued at $8,000–$12,000, resulting in a fee of $150–$250. Expedited review (1-week turnaround) adds $150–$200 but is rarely necessary for bathroom work.

How long does it take to get a bathroom remodel permit approved in Northbrook?

Plan review for a standard bathroom remodel in Northbrook typically takes 2–3 weeks from the date of application. If the application is incomplete (missing waterproofing detail, electrical plan, or drain routing), the department will return it marked 'incomplete' and the clock resets. E-filing permits online generally results in faster processing than in-person filing. Expedited review (1-week turnaround) is available for an additional fee but is not common for bathroom remodels.

Do I need a waterproofing detail drawing to get a permit for a tub-to-shower conversion?

Yes, absolutely. Northbrook's Building Department requires a waterproofing-assembly detail or manufacturer's specification sheet before issuing a permit for any tub-to-shower conversion. The detail must show the membrane type (sheet membrane, liquid-applied, or mortar-bed pan), the substrate (cement board or waterproof drywall), and the transitions at the curb and fixture penetrations. This detail can be a manufacturer's datasheet (e.g., Schluter Kerdi), a sealed drawing by a plumber or designer, or a written spec from the tile contractor. Without this detail, the permit will be returned marked 'incomplete.'

What inspections are required for a bathroom remodel in Northbrook?

A typical full bathroom remodel in Northbrook requires a rough-plumbing inspection (after pipes are in place but before drywall), a rough-electrical inspection (if new circuits are added), and a final inspection (after all work is complete). If walls are moved, a framing inspection is also required. The rough-plumbing inspector verifies drain slope, trap location, and vent routing. The rough-electrical inspector verifies GFCI/AFCI protection and outlet placement. The final inspector verifies waterproofing, caulking, fixture installation, and code compliance. Each inspection must be requested via the permit portal or by phone; inspectors typically schedule within 5 business days.

If my bathroom is in a house built before 1978, do I need lead-paint testing?

Yes. Illinois requires lead-paint testing and abatement per the Residential Lead-Based Paint Hazard Disclosure Act for any renovation, repair, or painting of a pre-1978 home. If painted surfaces are disturbed during the bathroom remodel (walls, trim, windows), lead testing is required. If lead is found, a certified lead-abatement contractor must perform containment and cleanup. The Northbrook Building Department does not conduct lead tests but may refer you to the Cook County Health Department. The lead-paint requirement is separate from the building permit but is often discovered during permit review if the home is pre-1978.

Can an owner-builder pull a bathroom remodel permit in Northbrook?

Yes, owner-builders can pull permits in Northbrook for owner-occupied residential projects, including bathroom remodels. However, the owner-builder is responsible for obtaining the permit, submitting accurate plans, passing inspections, and ensuring code compliance. Many owner-builders hire a licensed plumber and electrician to handle those portions of the work, even if the owner manages the project overall. A common strategy is to hire a plumber for the rough plumbing, hire an electrician for the rough electrical, and then do or coordinate the finishing work (drywall, waterproofing, tile, fixtures) yourself.

What happens if I install a new exhaust fan without a permit in Northbrook?

Installing a new exhaust fan without a permit in Northbrook can trigger a stop-work order and a fine of $250–$500. If the duct is improperly routed (e.g., terminating into the attic instead of outside, or kinked and restricting airflow), the Building Department may require that it be corrected and re-inspected. An unpermitted exhaust-fan installation discovered at resale or during a refinance can prevent closing until a retroactive permit is obtained and the work is inspected, costing time and money. Always obtain a permit before installing a new exhaust fan.

Can I use my own drawings for the bathroom remodel permit application, or must I hire a designer?

For most bathroom remodels in Northbrook, you can use your own drawings or sketches, provided they are clear and include the required details (plumbing plan with drain routing, fixture locations, vent routing; electrical plan with outlet locations and circuit protection; waterproofing detail if applicable). The drawing does not need to be sealed by an architect or engineer unless the remodel involves significant structural changes (wall removal, beam installation). A basic sketch on graph paper, dimensioned clearly and labeled, is often sufficient. However, if the department rejects your drawing as unclear, you may need to hire a professional to redraw it; avoiding this rejection by being precise upfront saves time and cost.

Disclaimer: This guide is based on research conducted in May 2026 using publicly available sources. Always verify current bathroom remodel (full) permit requirements with the City of Northbrook Building Department before starting your project.

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