Do I need a permit for roof replacement in
Morton Grove, Illinois?

Morton Grove roof replacement permits — the key details

The trigger for a roof permit in Morton Grove is straightforward on the surface but demands precision in practice. Per IRC R907.2 and the city's adoption of the Illinois Building Code, any of the following requires a permit: (1) complete tear-off-and-replace, (2) overlay covering 25% or more of roof area, (3) material change (e.g., asphalt shingles to metal, tile, or slate), or (4) structural repair to the roof deck. The permit application itself asks for roof area in squares (1 square = 100 sq ft), the existing roofing material and number of layers, the proposed material, underlayment type, fastening pattern, and (if applicable) ice-and-water-shield coverage. For overlays, the city requires a 'layered roof condition certification' signed by the contractor — this confirms there are fewer than 3 existing layers. Many Morton Grove homeowners assume a simple shingle-over-shingle replacement is 'just maintenance,' but if it covers 25%+ of the roof and the underlying layer count is unclear, the permit office will request a deck inspection. This back-and-forth adds 2–3 weeks to timeline, so clarifying layer count upfront saves grief.

Morton Grove's split between IECC Climate Zones 5A and 4A is a city-specific quirk that affects underlayment spec. North of Dempster Street (Zone 5A), ice-and-water-shield must extend 24 inches up from the eave line and 6 inches above the top of the wall; south of Dempster (Zone 4A), the requirement is 12 inches from eave and 3 inches above wall. The city's permit portal uses address-based lookups to auto-populate this requirement, so when you apply online (or when your contractor applies), the system flags which standard applies. Inspectors check underlayment in the field during the in-progress inspection (usually after deck nailing, before final roofing); a Zone 5A property with only 12 inches of ice-and-water-shield will be red-tagged and require rework. Additionally, Morton Grove lies on glacial till with variable drainage, so roof venting and gutter capacity matter more here than in areas with sandy or well-drained soil. If your roof soffit vents are blocked or undersized (IRC R905.2 mandates one square foot of vent per 150 sq ft of attic area), the inspector may flag that during final inspection and require additional venting — an expensive retrofit if missed at permit stage.

Exemptions exist but are narrow and strictly enforced. Repairs that affect fewer than 10 squares (1,000 sq ft) of roof area and involve the same material (shingles-over-shingles, no material change) may be exempt, provided they are not part of a larger 'planned project.' However, Morton Grove Building Department interprets 'repair' narrowly: if more than 25% of the roof surface shows wear or the repair involves removing and replacing deck boards (even a few), it flips from repair to replacement and requires a permit. The city does not offer a written exemption list, so if you're on the fence, calling the permit desk at 847-999-6600 (extension for Building Department — confirm current number) with your roof dimensions and scope is prudent. One common gray area: gutter replacement alone, or flashing-only work, is generally exempt and does not require a roofing permit, though it may need to comply with local drainage and property-line setbacks. If your re-roof job includes new gutters or downspout extensions (e.g., to manage runoff away from a neighbor's property), that work may require a separate grading or stormwater permit — rare, but documented in Morton Grove's floodplain and stormwater guidance.

Morton Grove's permit timeline and cost structure differ markedly from surrounding suburbs. The city does NOT offer over-the-counter same-day permitting for roofing; all roof permits are routed through Building Department plan review, which takes 5–7 business days. If the application is incomplete or the contractor fails to specify underlayment type or fastening pattern, it bounces back, adding another 5–7 days. Fees are based on 'valuation' — the Building Department uses a standard per-square cost (typically $1.50–$2.50 per square of roof area), so a 2,500 sq ft roof (25 squares) is valued at $3,750–$6,250, yielding a permit fee of $150–$400 depending on the fee schedule in effect. (Morton Grove's current fee schedule is available on the city website; confirm with the permit desk if you're budgeting.) In contrast, nearby Evanston charges a flat $150 for any roof replacement, and Des Plaines uses a simple $/square formula posted online. Morton Grove's valuation-based model means a high-end standing-seam metal roof replacement can push fees toward $600–$800, which surprises homeowners expecting $200. Owner-occupants can pull permits themselves; contractors are required to have a valid Illinois roofing license (per Illinois DLIS roofing contractor rules) and provide proof. If you're pulling the permit as owner-occupant, you must sign as applicant, and you alone are responsible for ensuring the work meets code.

Inspection and sign-off in Morton Grove follows a two-touch process. The first inspection ('in-progress' or 'deck nailing inspection') happens after the old roofing is removed and the deck is prepared, but before underlayment and final roofing are installed. The inspector checks deck nailing (typically 10d or 12d ring-shank nails, spaced per IRC R905), boards for rot or structural damage, and underlayment deployment (ice-and-water-shield coverage per your climate zone, and synthetic or 30# felt underlayment per spec). If the deck has soft or rotted spots, the inspector will flag areas for repair; the contractor must pull a separate 'structural repair' permit for those, which adds cost and time. The final inspection occurs after the roofing is fully installed; the inspector verifies material matches the permit application, penetrations (vents, chimneys, skylights) are properly flashed and sealed, and gutters and downspouts are in place and functioning. Roofing permits usually close within 2–3 weeks from submission, assuming no plan-review rejections and no field corrections. If corrections are needed, add another 1–2 weeks. Contractors familiar with Morton Grove know to spec everything upfront (including ice-and-water-shield footage, fastener type, and any structural concerns) to avoid post-inspection rework.

Three Morton Grove roof replacement scenarios

Morton Grove climate zone split: why underlayment spec matters for your roof permit

Morton Grove straddles IECC Climate Zones 5A (north of Dempster, colder, higher freeze-thaw cycles) and 4A (south of Dempster, slightly milder). This geographic split is not unique to Morton Grove — it cuts through much of the Chicago suburbs — but Morton Grove's Building Department explicitly flags it in the permit portal by address lookup. When you input your property address in the online permit system (or when your contractor does), the system auto-populates your climate zone and the corresponding ice-and-water-shield requirement. Zone 5A requires ice-and-water-shield to extend a minimum of 24 inches up from the eave line and 6 inches above the top of the wall; Zone 4A allows 12 inches from eave and 3 inches above. The reason: Zone 5A experiences more severe ice-damming risk due to colder temperatures and longer freeze-thaw periods, so extra insurance against water backup is mandated.

During the deck nailing inspection, Morton Grove inspectors carry a tape and verify ice-and-water-shield footage. If you're in Zone 5A and the contractor has installed only 12 inches, the inspector will stop the work and flag it as a deficiency. The contractor must then remove shingles, peel back underlayment, and extend the ice-and-water-shield upward — rework that costs $500–$1,000 and adds a week to the project. Conversely, if you're in Zone 4A and over-spec'd with 24 inches (thinking 'more is better'), the inspector will note it as 'exceeds code' but will not reject it; however, the extra material cost ($200–$300) was unnecessary. Many contractors working across suburban Chicago assume all of Cook County requires the higher Zone 5A standard; clarifying your actual zone in the permit application saves time and money.

The zone boundary itself is a permitted-project wildcard. If your roof straddles Dempster Street (unusual but possible for larger homes or corner lots), the permit application must specify ice-and-water-shield specs for BOTH zones on the same roof. Some contractors find this confusing and under-spec the Zone 5A side; the inspector catches it and orders rework. Best practice: have your contractor note in the permit app 'Zone 5A on north slopes (Dempster side), Zone 4A on south slopes' and quantify underlayment length for each. This upfront clarity prevents a second inspection trip and keeps the project on schedule.

The 3-layer roof rule: why Morton Grove inspectors check layer count in the field, and what happens if you miss it

IRC R907.4 states unambiguously: 'where the existing roof covering is of wood shingles or shakes, asphalt shingles, slate, clay or concrete tiles, or metal roof coverings, an application of a new protective covering over the existing roof covering shall not be permitted where there are already two or more applications of any of these materials.' In plain English: if there are already two layers, you cannot add a third. Most homeowners have no idea how many layers are on their roof, and many assume it's safe to do a quick overlay without investigation. Morton Grove Building Department addresses this by requiring a 'layered roof condition certification' from the contractor for all overlays. This is a signed statement certifying the layer count; if the contractor gets it wrong or the city inspects and finds a third layer, the overlay permit is revoked and the project is red-tagged for tear-off.

The layer count is determined by either (a) visual inspection from the eaves or fascia edge (you can sometimes see stacked shingles), or (b) drilling a small core sample from an inconspicuous area (gable end, rear corner) and removing a plug to count the layers. Contractors familiar with Morton Grove know to core-sample early and document it in the permit app. What catches homeowners off-guard is the age factor: a roof from the 1970s that was re-roofed in 1995 and again in 2010 is legitimately 3 layers, and an overlay in 2024 would be illegal. The inspector discovers this in the field (usually during the deck nailing inspection), stops the work, and orders a tear-off. At that point, you're paying tear-off labor ($2,000–$4,000) instead of an overlay ($5,000–$8,000), plus permit revocation and re-permitting as a tear-off job.

To avoid this, request a core sample or layer inspection as part of your contractor's pre-bid scope. A conscientious roofer will provide a photo or core result in the estimate. If your roof is 2 layers, overlay is fair game (with a Zone-appropriate underlayment spec); if it's 3 or more, budget for a tear-off. Morton Grove does not offer a way to 'pre-approve' a layer count without pulling a permit, so confirming layer count upfront and including it in the permit application is the safest path.

Common questions