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

Maywood roof replacement permits — the key details

The fundamental rule is IRC R907.4, which Maywood enforces strictly: you cannot overlay a new roof onto an existing roof that already has two or more layers of material. This requirement exists because multiple layers trap moisture, hide deck rot, and compromise ventilation, all of which accelerate failure in Maywood's freeze-thaw climate (zone 5A, 42-inch frost depth). When you submit a permit application to the City of Maywood Building Department, the first question they ask is: how many layers exist now? If you answer two or more, the permit office will immediately tell you tear-off is mandatory. Many homeowners discover this the hard way after paying a contractor for an overlay-quote only to have Maywood reject the permit. The exception is minor repair work: patching fewer than 10 squares (1,000 sq ft) of the same material, same pitch, same profile is exempt from permitting. Anything larger than 25% of total roof area, any tear-off, or any material change requires a permit application.

Maywood's permit application process is straightforward but document-heavy. You'll submit a completed building permit form (obtainable from City Hall or the Building Department), a site plan showing the roof outline and square footage (or the contractor can provide this), a copy of the roofing material specification (asphalt shingle brand and grade, metal gauge and profile, or tile), the fastening pattern (nail spacing, types, and locations per IRC Table R905.8.1), and underlayment type and installation method. If you're tearing off existing roof, the application must state this explicitly. If the roof currently has two layers, include a note confirming tear-off; if it has only one layer, you can apply for overlay (subject to plan review approval). Plan Review typically takes 3–7 business days; if the application is incomplete or non-compliant, the city will issue a Correction Notice detailing what's missing. Most applications are over-the-counter approvals (same-day or next-day) if the work is like-for-like and complete. Permit fees run $150–$350 based on total roof area; a 1,500 sq ft roof is about 15 squares, so you'd expect a $200–$250 permit fee.

Ice-and-water-shield specification is a Maywood hot-button. IRC R905.1.1 (and by reference, the Illinois Building Code Section 1505) requires ice-and-water-shield to extend up the roof slope from the eaves to a point at least 24 inches inside the building's exterior wall, OR to extend at least 24 inches up every sloped surface from the eave, whichever is greater. In Maywood's cold climate (winter temperatures regularly below 0°F, roof snow load design value 25–30 psf depending on roof pitch), water-ice dams form along eaves and gutters, forcing meltwater to back up under shingles. Maywood building inspectors have rejected reroofing permits for insufficient ice-and-water-shield specs — typically when the applicant lists only 6 or 12 inches, or fails to specify product entirely. You must name the product (e.g., 'Grace Ice & Water Shield' or 'Underlayment per ASTM D1970, minimum 30-mil thickness') and confirm installation depth in your permit application. A common workaround is to specify one full row of ice-and-water-shield for every 12 inches of roof height drop per 12 inches of run (i.e., for a 12:12 pitch, you'd run ice-and-water-shield 24+ inches; for a 4:12 pitch, 8+ inches), but Maywood Plan Review often demands the full 24-inch minimum regardless of pitch, so build that into your spec.

Structural loads come into play if you're changing material. If your current roof is 3-tab asphalt shingle (15 lb/100 sq ft dead load) and you want to switch to concrete tile (900+ lb/100 sq ft), you need a structural engineer's certification letter stating the roof deck and supporting framing can handle the new load, and that any necessary reinforcement has been specified. Maywood requires this letter in the permit application; without it, the city will reject the application or flag it for additional inspection. Metal roofing (standing seam, metal shingle) is typically lighter (50–150 lb/100 sq ft) so structural upgrades are rarely needed, but the permit office may still ask for confirmation. This is less common but worth budgeting for if you're contemplating a material change — a structural engineer letter costs $300–$600. Slate and clay tile are heavy and almost always trigger a structural review, sometimes adding 2–3 weeks to the permit timeline.

Inspections are two-phase in Maywood for full tear-off and replacements. The first inspection occurs after deck nailing or repair (if any rot is found during tear-off); the inspector verifies that the deck is fastened properly, is sound, and is ready for underlayment and roofing material. The second inspection is final, conducted after the roofing material is installed but before you close out the permit; the inspector checks fastener spacing, underlayment overlap, flashing at penetrations and edges, and that the material matches the permit specification. For overlay work (if approved on a one-layer roof), final inspection only is typical. Schedule inspections at least 24 hours in advance; Maywood Building Department phone line is the booking point (confirm current number with City Hall, as it may change). Most inspections happen within 2–5 business days of request. Once the final inspection passes, you'll receive a final certificate of occupancy or inspection sign-off card, which you should keep with your home records (important for insurance, resale, and future permit applications).

Three Maywood roof replacement scenarios

Maywood's ice-and-water-shield enforcement and Chicago-area freeze-thaw cycles

Maywood sits in IECC Climate Zone 5A (Chicago metropolitan area), with a 42-inch frost depth and average winter temperatures dipping to -5°F to -15°F. Roof eaves are particularly vulnerable because they're the coldest part of the roof — the overhang extends beyond the insulated wall, so the eave temperature is often below the ambient air temperature, especially on clear, windless nights. When warm air escapes through attic ventilation (per IRC R806), it can melt snow on the upper roof slope; that meltwater runs down and hits the eave, where it refreezes into a dam. Water is then forced back up under the shingles, seeping into the deck and framing. This causes rot, ice damage, and interior water stains — all expensive to repair. Maywood Building Department has seen enough ice-dam failures that inspectors now enforce ice-and-water-shield specs very strictly.

The IRC R905.1.1 minimum is 24 inches of ice-and-water-shield up from the eave (or to the interior wall, whichever is greater). But Maywood's Plan Review Section interprets this as a hard floor, not a soft guideline. If you submit a permit spec saying '12 inches of ice-and-water-shield from eave,' Maywood will reject it and ask for 24 inches minimum. If you submit '24 inches on a 4:12 pitch roof' and a Plan Reviewer calculates that 24 inches upslope only covers a 2-foot run, they may demand more coverage. The safest approach: specify ice-and-water-shield starting at the eave, running a minimum of 24 inches upslope, plus one additional course (typically 3 feet wide) over the first exterior wall framing line (where the attic air leakage is most severe). This is not required by code but is Maywood-Plan-Review–friendly and dramatically reduces ice-dam risk.

Product selection matters. Maywood does not mandate specific brands (Grace, Underlayment, etc.) but requires ASTM D1970 compliance (minimum 30-mil thickness, adhesive-backed, with release film or dust). Synthetic underlayments (polyethylene or polypropylene) are acceptable as long as they meet D1970. Do not attempt cheap utility-grade ice-and-water-shield; Maywood inspectors can spot thin material and will red-tag it. Budget $1.50–$3.00 per sq ft of roof area for premium ice-and-water-shield.

Two-layer roof enforcement in Maywood and tear-off cost implications

IRC R907.4 states that reroofing (overlay) is not permitted if the existing roof has two or more layers of roof covering. This rule exists because multiple layers create a moisture trap and hide deterioration; once a deck is covered by two layers, rot can advance silently for years. Maywood enforces this rule without exception. If you apply for an overlay permit and disclose two existing layers, Maywood will immediately reject the application and require a tear-off amendment or a new tear-off permit application. Some homeowners try to circumvent this by claiming the bottom layer is 'roofing felt only, not a covering,' but this doesn't fly; if any nailed-down layer is below the top shingles, it counts as a layer.

The cost difference between overlay and tear-off is significant. An overlay on a 1,500 sq ft roof costs roughly $3,500–$5,500 in labor and material (no disposal, minimal deck prep). A tear-off on the same roof costs $6,500–$10,000 (adds dumpster rental, deck inspection, possible rot repair, and longer labor). Discovering a two-layer roof at permit stage means your contractor's initial estimate is now $3,000–$4,500 too low — a painful surprise for homeowners. Before you hire a roofer and collect quotes, climb into your attic (if accessible) and look at the roof decking and nail pattern. If you see nails spaced 6–12 inches in both directions over a wide area, that's likely two or more layers. Or ask your roofer to physically inspect during the estimate — they should tell you layer count before quoting.

Maywood Building Department will sometimes offer a pre-application consultation (free or low-cost phone call) where you describe your roof and ask whether permit will be required and what the tear-off vs. overlay situation is. Take advantage of this. Call ahead, describe your roof age and condition, and ask: 'Do you expect two layers, and if so, will overlay be permitted?' This can save weeks of back-and-forth later. If you're unsure, hire a roofer to do a free estimate that includes layer count, and bring that info to the city.

Common questions