Research by DoINeedAPermit Research Team · Updated May 2026
The Short Answer
If you're finishing your basement to create a bedroom, bathroom, or living space, you need a building permit from the City of Hays. Storage-only or utility finishes are exempt; habitable rooms are not.
Hays enforces the 2015 International Building Code with local amendments, and the city's Building Department requires a full permit for any basement space that will be used for living, sleeping, or bathing. Unlike some Kansas municipalities that defer to county jurisdiction for residential projects, Hays Building Department has direct authority over all residential permits within city limits — so your application goes to the city, not Ellis County. The critical Hays-specific angle: the city sits in climate zone 5A (north Hays) to 4A (south), with a 36-inch frost depth and highly variable soil (loess in the north, expansive clay to the east, sandy loam to the west). This soil variability means perimeter drainage and moisture mitigation are not optional — the Building Department flagged basement water intrusion as a common pre-permit failure, and you'll need to document existing drainage or propose a new sump/ejector system before plan review clears. Hays also requires radon-mitigation readiness for all basement work (passive roughing-in; active system optional later), which is less common in neighboring jurisdictions. Owner-builders are allowed for owner-occupied homes, but you'll still need to pull permits and pass all inspections — no exemption for DIY labor.

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

Hays basement finishing permits — the key details

The core rule is IRC R310.1, which Hays adopts: any basement bedroom must have an egress window (or door). Egress is defined as a window with a clear opening of at least 5.7 square feet (3 ft wide × 4 ft tall minimum) and a sill height no more than 44 inches above the finished floor, with direct access to grade or a window well sized to match. This is not a recommendation — it is a life-safety requirement because firefighters and occupants need a second exit route in case of fire. The Hays Building Department will not issue a certificate of occupancy for a basement bedroom without a photo of the installed egress window and measurements documented on the permit. Cost to install a new egress window: $2,000–$5,000 for rough opening, window, well, and grading. If your basement already has a window, measure the clear opening and sill height yourself first; if it doesn't meet code, plan to install one. This is the single biggest permit rejection point in Hays — applicants assume they can finish a bedroom and add the window later, or they propose a window that's too small or too high. Don't assume; verify dimensions against IRC R310.1 before design.

Ceiling height is IRC R305 territory: finished basement rooms must have a minimum of 7 feet clear floor-to-ceiling height. Beams, ducts, and pipes can project down to 6 feet 8 inches in limited locations (not over the entire room), and only if the obstruction covers less than 50 percent of the ceiling area. Hays soil can be wet and expansive in some areas, which means basements sometimes experience heave or cracking if drainage is poor; if you're doing any concrete work or grading, the Building Department will ask about foundation drainage. Measure your current basement ceiling; if it's under 7 feet, you cannot legally make it a bedroom or living room. If it's 6'8" to 7 feet, you can finish it, but you must limit beam protrusions and ensure no occupied space falls below 6'8". The good news: most finished basements in Hays are depths that allow 7+ feet of headroom, so this is rarely a blocker. The bad news: if you do hit this issue, fixing it often means installing a new beam or regrading the exterior, which doubles your project cost.

Egress, ceiling height, and moisture mitigation form a trio. The Hays Building Department requires you to address basement water intrusion before plan review approval. If you've had any water, dampness, or mold history, you must document existing perimeter drainage (downspout extensions, gutters, grading slope) on your permit drawings, or propose a sump pump, interior drain system, or vapor barrier. Hays' loess and clay soils hold water; sandy loam in the west part of the city drains faster but still requires attention. A radon test is not required by code, but Hays Building and Planning staff strongly recommend passive radon mitigation roughing-in (vent stack and ductwork ready for a fan, installed cost $300–$800) because Hays is in EPA radon zone 1 (elevated risk). You won't fail inspection without it, but you'll be advised to add it, and buyers later will ask about radon mitigation. Include it in your plan; it's cheap insurance.

Electrical, plumbing, and HVAC permits piggyback on your building permit application. Adding circuits to power new outlets, lights, or HVAC equipment requires electrical work to be done by a licensed electrician (owner-builders can do some work, but Hays requires electrical to be performed or inspected by a licensed K-State certified electrician for final sign-off). Bathroom or wet bar requires plumbing permits and must be roughed and inspected before drywall. Extending furnace ductwork or adding a return-air path requires HVAC work and sometimes a mechanical permit. All three (building, electrical, plumbing, mechanical) can be combined into one permit application, but each trade gets its own inspection sequence: rough framing, rough electrical, rough plumbing, rough HVAC, then insulation, drywall, and final. Total plan review and inspection timeline in Hays is 3–6 weeks, sometimes longer if the Building Department requests revisions (egress sizing, drainage clarification, radon ductwork location, etc.).

Smoke and CO detectors are IRC R314 territory. All basement bedrooms and living spaces must have interconnected smoke and CO detectors. If you're adding a bedroom downstairs, the detectors in that room and on each level of the home must be hardwired (with battery backup) or wireless interconnected. This is checked during final inspection. If your home has old battery-only detectors, you'll need to upgrade to hardwired or interconnected wireless units — cost is $100–$300 for the set. Also note: the International Energy Conservation Code (IECC) adopted by Hays requires air sealing and insulation for any conditioned basement space. If you're finishing a basement and adding or relocating HVAC ducts, all ducts must be sealed and insulated to R-6 minimum. Walls and rim joists must be insulated to R-13 or R-15 depending on whether they're interior or exterior-facing. This isn't a showstopper, but it does mean you can't just spray foam and move on — the Building Department will ask for insulation documentation and may require a blower-door test if you're making major changes to the thermal envelope.

Three Hays basement finishing scenarios

Scenario A
Finished bedroom with egress window, new bathroom, in a south-Hays ranch home on sandy loam soil
You're finishing 400 square feet of basement into a bedroom and 3/4 bath. Your current basement ceiling is 7 feet 2 inches (measured clear). The basement has never flooded, but you see some moisture on the south wall in spring. You plan to install one new egress window on the south wall (well-draining sandy loam), relocate an existing ductless furnace return-air intake, add one bathroom with toilet, vanity, and shower, and extend electrical circuits for three new outlet boxes and two light fixtures. Your GC will handle all work, and you'll hire licensed plumbers and electrician. Step 1: contact the Hays Building Department and request a permit application packet for 'basement remodel — habitable bedroom and bathroom.' You'll provide a site plan showing the window well location, foundation grading slope (confirm 5% slope away from foundation for at least 10 feet), and existing/proposed drainage (you'll probably just document existing gutters and downspout extensions, since sandy loam drains well). Step 2: have your GC or architect draw cross-sections showing the egress window (minimum 5.7 sq ft clear opening, sill ≤44 inches), ceiling height at all points (7 feet clear minimum), bathroom layout with toilet vent, and bathroom exhaust duct routed to exterior (no recirculation). Step 3: submit the building permit with electrical and plumbing work descriptions; the Building Department will cross-file an electrical permit and plumbing permit. Permit fee is typically $400–$600 (1.5–2% of estimated valuation; estimate $25,000–$40,000 for this scope). Step 4: plan review takes 2–3 weeks; the Department will likely ask for egress window dimensions in writing (not just a sketch), confirmation of radon mitigation readiness (they'll advise you to rough in a vent stack), and detail of the bathroom vent routing. Step 5: rough framing inspection once walls are framed and window opening is cut (Department inspector verifies ceiling height and window opening size). Step 6: rough electrical inspection (circuits, outlets, and lighting roughed in before drywall). Step 7: rough plumbing inspection (all waste lines, vent stacks, and supply lines roughed in). Step 8: insulation and air-sealing inspection (walls, rim joist, any ducts over insulation visible). Step 9: drywall inspection (optional — not all jurisdictions inspect drywall, but Hays may depending on the job size). Step 10: final inspection (egress window installed and operational, detectors wired, bathroom fixtures installed, electrical circuits live, plumbing fixtures working, exhaust fans ducted outside). Timeline: plan review 2–3 weeks, construction 4–8 weeks, inspections (5–6 total) spread across construction. Total permit cost: $450–$650. No surprises here — this is a straightforward permit in a city with good building-code alignment.
Building permit required | Plan review 2–3 weeks | Egress window new install $2,500–$4,500 | Electrical permit included | Plumbing permit included | AFCI and CO detectors required | Permit fee $450–$650 | Total project $35,000–$55,000
Scenario B
Finished family room (no bedroom, no bathroom) with in-floor radiant heating in east-Hays home on expansive clay soil with history of water seepage
You're finishing 600 square feet of basement into a family room and recreation area. No bedroom, no bathroom, no sleeping occupancy. Current ceiling is 7 feet 4 inches. Your basement has a 2-3 year history of seeping water along the east wall in heavy rain (spring and fall), and the foundation has some stair-step cracking. You plan to install new drywall over a vapor barrier, in-floor radiant tubing tied to your existing boiler, and a few new electrical outlets. You assume this is exempt because there's no bedroom. This assumption is partially correct — without a bedroom, you don't trigger the full battery of habitable-space code requirements (egress window, interconnected detectors everywhere, full HVAC to the space). However, the water seepage and expansive clay soil mean the Hays Building Department will require moisture mitigation before permit approval. Expansive clay can heave or shrink, and seepage indicates inadequate perimeter drainage. Step 1: before permit submission, hire a foundation drainage specialist to assess the east wall. Document existing gutters, downspout extensions, grading slope, and any visible cracks. Step 2: propose interior perimeter drain (interior drain tile along the east wall, sump pump, ejector pump discharge to daylight or storm drain), or propose exterior drainage (excavate exterior footing drain, re-slope grade to 5%+ slope away). Hays Building Department will require one or the other before you touch the basement interior. Step 3: submit permit application with the drainage plan. Even though the space is non-habitable (family room, not bedroom), the Building Department will classify this as 'basement remodel' and require a full building permit because you're adding finishes and systems. Step 4: plan review will focus on moisture mitigation; the inspector may require a licensed drainage contractor's certification or engineer's stamping of the drainage design. Expect 3–4 weeks for review, potentially longer if they request drainage revisions. Step 5: pre-construction inspection (drainage system installed and tested if interior pump, or exterior footing drain confirmed before backfill). Step 6: rough electrical inspection (circuits for radiant heating control and outlets roughed in). Step 7: drywall and final inspection. The key difference from Scenario A: no egress window, no bathroom, no interconnected detectors, no bedroom designation, BUT heavier focus on foundation drainage and moisture mitigation. Permit fee is $350–$500 (smaller than Scenario A because no plumbing/bathroom). Timeline is similar (plan review 3–4 weeks, construction 4–6 weeks), but moisture mitigation work adds 1–2 weeks upfront. Total additional cost for drainage system: $3,000–$8,000 depending on interior vs. exterior and pump type. The radiant heating control will require a licensed mechanical contractor or licensed HVAC installer, so expect a mechanical permit as well.
Building permit required | Moisture mitigation required (expansive clay + seepage history) | Interior drain/sump system or exterior footing drain $3,000–$8,000 | Plan review 3–4 weeks | Non-habitable family room (no bedroom exemption) | Electrical permit included | Mechanical permit likely (radiant heating control) | Permit fee $350–$500 | Total project $25,000–$45,000
Scenario C
Owner-builder finishing basement storage and utility area in north-Hays (loess soil, 36-inch frost depth) — no habitable space
You own a 1970s home in north Hays on loess soil. Your basement is unfinished, cold, and you want to add drywall and paint to create climate-controlled storage for tools and seasonal items. No bedroom, no bathroom, no living occupancy. Ceiling is 7 feet. You're planning to do the work yourself: drywall, tape, mud, paint, and a few new shelves. You do not plan to add electrical outlets, plumbing, or HVAC. As the owner-builder, you can handle this work without a permit in Hays, provided it remains unheated and non-habitable storage. However — and this is important — the moment you add electrical service (even a single outlet), a new circuit, or heating (space heater on its own circuit), you cross into permit territory and must pull a building permit. If you stay strictly to drywall, insulation, vapor barrier, paint, and no new electrical, this is exempt. Loess is well-draining but can be dusty and prone to settling; Hays' 36-inch frost depth is relevant if you're planning any future grading or foundation work near the basement perimeter (utilities must go below frost depth), but for a storage finish, it's not a design issue. Step 1: confirm the space will remain unheated and non-habitable. Step 2: install proper vapor barrier (6-mil polyethylene minimum) over the basement slab or concrete before drywall, especially in loess soil where moisture can wick up in spring. Step 3: frame the walls (wall studs, not attached to the rim joist per best practice — allows for settling), apply vapor barrier and insulation (R-13 to R-15 recommended in zone 5A), then drywall. Step 4: tape, mud, paint. No permit required. If you later decide to add a bedroom or bathroom, or if you want to install outlets or a space heater, you must stop, pull a permit, and have the Building Department inspect before you proceed. This scenario showcases how Hays' owner-builder allowance works: you can finish storage and utility spaces without a permit, but the moment you create habitable conditions or add electrical/mechanical systems, you're into permitting. The loess soil is benign for storage (doesn't require drainage mitigation like expansive clay), so there are no hidden requirements. This is the cleanest exempt scenario.
No permit required (storage/utility only, non-habitable, no electrical/heating) | Vapor barrier (6-mil polyethylene) required before drywall | Insulation R-13+ recommended | Owner-builder allowed | If you add egress, bedroom, bathroom, electrical, or heating later: permit required | Total material cost $2,000–$4,000 | No permit fees

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Egress windows: the non-negotiable requirement for basement bedrooms in Hays

IRC R310.1 is unambiguous: every basement bedroom must have at least one egress window (or door to grade). Egress is defined by clear opening dimensions (5.7 square feet minimum), sill height (44 inches maximum above finished floor), and direct access to grade or a properly sized window well. In Hays, the Building Department reviews egress drawings carefully because basements are below grade, and firefighters rely on egress for rescue. The window itself must be operable from inside (no locks that require a key), tempered glass if the sill is lower than 24 inches above the floor, and the well must be at least as wide as the window opening, graded to drain (perforated drain pipe at the bottom in loess or clay). Cost to install a new egress window from scratch: excavate the opening (6–8 inches larger than the window frame), install a prefabricated or custom window well, set the window frame, backfill with gravel, and grade the exterior. Total cost: $2,000–$5,000 depending on soil (sandy loam easier than expansive clay). If your basement already has a window, measure the clear opening (width × height when fully open) and the sill height; many older windows are too small or sills are too high. The Hays Building Department will measure the window during rough framing inspection and require documentation before drywall. Do not assume a basement window meets egress — verify it in writing on the permit drawings.

The window well itself is critical. Hays soil is often wet in spring (loess holds water, clay is even wetter), so the well must have drainage. A window well that pools water after rain is useless for egress (occupant can't escape through wet, muddy opening) and defeats moisture mitigation. Use a prefabricated plastic or metal well with a perforated drain line to daylight or a sump pit. Gravel inside the well, not soil. Install a removable grate or cover to keep debris out, but ensure it's removable from inside without tools. Some wells come with emergency escape bars (ladder rungs); these are optional but helpful for children or elderly occupants. Cost of the well itself: $400–$800; installation and drainage: $1,000–$2,000 more.

Hays Building Department will not issue a certificate of occupancy for a basement bedroom without proof of an installed, operational egress window. This means the window must be fully installed, painted, caulked, and operational before final inspection. If you're planning a basement bedroom, budget the egress window into your project cost upfront and install it early (after rough framing, before drywall). Do not plan to add it later as a retrofit — retrofitting an egress window into an already-finished basement wall is much more disruptive and expensive.

Moisture mitigation and soil variability in Hays basement finishing

Hays straddles three soil zones: loess (north and central), expansive clay (east), and sandy loam (west). Loess is silt formed by wind deposit, well-draining but dusty and prone to settling. Expansive clay (common in Ellis County east of Hays) swells when wet and shrinks when dry, causing foundation heave and cracking. Sandy loam (west side) drains quickly but can shift with frost heave in winter. The 36-inch frost depth in Hays means any buried utilities, footing drains, or sump discharge must go below grade or route to daylight above frost line. The Hays Building Department does not require a soil test for basement finishing (unlike some jurisdictions), but they do require documentation of existing perimeter drainage and moisture history. If you've had any seeping, dampness, or mold in your basement, the Department will ask for a mitigation plan before permit approval.

The three mitigation options are: 1) improve exterior drainage (extend gutters and downspouts to discharge at least 10 feet from foundation, slope grade to 5%+ slope away, ensure swales don't pool water near the foundation), 2) install interior perimeter drain (tile or drain pipe around the inside of the foundation walls, sloped to a sump pump, cost $2,000–$5,000), or 3) apply interior waterproofing (vapor barrier, paint, or membrane on the interior walls before finishing, cost $500–$1,500). Most Hays basements are successfully finished with improved exterior drainage alone — gutters, downspout extensions, and slope. If you have a sump pump already, great; the Building Department will ask you to confirm it's operational and that the discharge line exits the home and slopes away (not back toward the foundation). If you have expansive clay (east Hays), exterior drainage is less effective because clay holds water; the Building Department may require interior drain or a combination. Sandy loam (west) is usually fine with exterior drainage. Loess (north/central) is in between — usually exterior drainage works, but if you're on a low spot or near a storm drain inlet, interior drain is safer.

Radon is not a permit-code requirement in Hays, but EPA zone 1 (elevated radon risk) means the Building Department will strongly recommend radon mitigation readiness during plan review. This means roughing in a passive radon system: a 3-inch or 4-inch PVC ductwork path from the basement slab or sub-slab to the exterior attic or roofline, stubbed out at the roof for a future radon fan if needed. Cost to rough in: $300–$800; cost to add the fan later if you test positive: $1,000–$1,500. It's cheap to install during construction, expensive to retrofit. Include it in your permit drawings; the Building Department will appreciate it and may fast-track plan review if you show radon readiness. A radon test is recommended after occupancy but not required; some lenders and appraisers ask about it at sale.

City of Hays Building Department
1507 Main Street, Hays, Kansas 67601 (City Hall main address; confirm building permit office location)
Phone: (785) 628-7200 (City Hall main line; ask for Building Permits) | https://www.haysks.gov/ (look for 'Permits' or 'Building Permits' under city services; online portal availability may vary)
Monday–Friday, 8:00 AM–5:00 PM (verify hours before visit)

Common questions

Do I need a permit to finish a basement that will only be storage, not a bedroom?

If the space remains non-habitable (unheated, no bedroom designation, no bathroom), and you do not add electrical circuits, heating, or plumbing, then no permit is required in Hays. You can drywall, insulate, paint, and add shelves without a permit. However, the moment you add an electrical outlet, a space heater, or propose a bedroom or bathroom, you must pull a building permit. Storage-only finishes are exempt; habitable finishes are not.

Can an owner-builder do basement finishing work in Hays?

Yes, owner-builders are allowed in Hays for owner-occupied homes. However, you must still pull a building permit if the space is habitable (bedroom, bathroom) or if you add electrical, plumbing, or mechanical systems. Owner-builder status means you can do the labor yourself, but you cannot skip permitting. Licensed electricians and plumbers are required to inspect and sign off on electrical and plumbing work in most cases — Hays does not allow owner-builders to do all electrical work themselves. Contact the Building Department for specifics on owner-builder scope and licensing requirements.

What is the cost of a basement finishing permit in Hays?

Permit fees in Hays are typically 1.5–2% of the estimated project valuation. For a basement bedroom and bathroom, estimate $25,000–$40,000 total project cost, resulting in a permit fee of $400–$650. Storage-only finishes or small remodels may cost $150–$300. Call the Building Department or request a fee schedule to get a precise estimate based on your project scope. Fees may include building, electrical, plumbing, and mechanical permits combined, or may be charged separately depending on the Department's fee structure.

Is a radon mitigation system required for basement finishing in Hays?

No, radon mitigation is not a code requirement in Hays. However, Hays is in EPA radon zone 1 (elevated risk), and the Building Department recommends roughing in a passive radon system (PVC ductwork stub to the roof) during construction. The cost to rough in is only $300–$800; retrofitting a radon fan later costs $1,000–$1,500. It is not required by code, but it is highly recommended and will be noted in plan review comments.

How long does plan review take for a basement finishing permit in Hays?

Plan review typically takes 2–4 weeks in Hays, depending on the complexity and completeness of your application. Basements with moisture concerns or missing egress details may require 4–6 weeks if the Department requests revisions. Rough framing, electrical, plumbing, and final inspections are spread across construction; total inspection timeline is 5–8 weeks depending on construction pace. Submit a complete, detailed application with egress dimensions, drainage documentation, and radon ductwork locations to avoid delays.

What happens if my basement ceiling is less than 7 feet high?

Finished basement rooms must have a minimum 7-foot clear floor-to-ceiling height per IRC R305. Beams and ducts can project down to 6 feet 8 inches in limited areas (less than 50 percent of the room), but the room cannot be designated as a bedroom or primary living space if headroom is less than 7 feet. If your basement ceiling is under 7 feet, you can still finish it as storage or utility space (exempt), but you cannot legally make it a bedroom. Measure your ceiling; if it's marginal, contact the Building Department before design.

Do I need smoke and CO detectors in a finished basement?

Yes. Any finished basement with a bedroom, bathroom, or habitable space must have interconnected smoke and CO detectors. They must be hardwired with battery backup or wireless interconnected. If you're adding a basement bedroom, all detectors in the home (including the basement) must be interconnected so they all alarm if one is triggered. This is checked during final inspection. Upgrade cost: $100–$300 for the full set of interconnected detectors.

Can I finish a basement without adding an egress window if there is no bedroom?

Yes. Egress windows are required only for bedrooms (IRC R310.1). If you're finishing a family room, recreation room, or storage space and not designating any room as a bedroom, an egress window is not required. However, if you later want to convert the space to a bedroom, you must install an egress window before occupying it as a bedroom. Egress is the code item that changes everything — without it, you cannot legally have a bedroom below grade.

What do I need to do if my basement has had water seeping in the past?

The Hays Building Department will require you to address water intrusion before permit approval. Document the history (where it seeps, when it occurs, duration), inspect perimeter drainage (gutters, downspouts, grading slope), and propose a mitigation plan: improve exterior drainage, install an interior sump/drain system, or apply interior waterproofing. East-Hays homes on expansive clay may require interior drain; west-Hays sandy loam usually responds to exterior grading. Include drainage drawings in your permit application; the Department may request a licensed drainage contractor's assessment if the issue is severe.

Can I finish a basement and add a bedroom without hiring a contractor?

Owner-builders are allowed in Hays, but you must pull a building permit and pass inspections. Licensed electricians must handle or inspect electrical work, and licensed plumbers must handle or inspect plumbing work (if adding a bathroom). You can do framing, drywall, insulation, and painting yourself, but electrical and plumbing will require licensed professionals. Hiring a general contractor often simplifies permitting because they manage subcontractors and coordinate inspections, but it is not required. Contact the Building Department for owner-builder rules and licensed-trade requirements specific to your project.

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Disclaimer: This guide is based on research conducted in May 2026 using publicly available sources. Always verify current basement finishing permit requirements with the City of Hays Building Department before starting your project.

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