The Roofing Book

Permitting Authorities / Town of Castle Rock - Building Division

Do you need a permit to replace a roof in Castle Rock, CO?

Adopted code

Town of Castle Rock - Building Division

Yes — a permit is required to replace a roof in Castle Rock, CO, issued by Town of Castle Rock - Building Division.

Jurisdiction
Town of Castle Rock, Colorado
Jurisdiction type
city
Address
Castle Rock, CO
Contact
  • url: https://www.crgov.com/1887/Building
Permit portal
Permit portal
Roofing permit required
Required
Contractor registration required
Required
Registration details
  • license: Contractors must be registered to work in the Town of Castle Rock; general, roofing, and mechanical contractors must be registered with Douglas County.
Adopted code
2024 IBC, IRC, IMC and IPC, 2026 NEC, and 2021 IECC with Town of Castle Rock amendments, per Ordinance No. 2026-017 (adopted June 2, 2026; effective June 30, 2026).
Drip edge
Required About drip edge
Ice & water shield
Required — Per CRMC 15.06.030 (Section R905.1.2, Ice barriers, as amended by Ordinance No. 2026-017, adopted 6/2/2026, effective 6/30/2026): an ice barrier shall be installed on eaves and valleys for asphalt shingles, metal roof shingles, mineral-surfaced roll roofing, slate and slate-type shingles, wood shingles, and wood shakes, consisting of not less than two layers of cemented underlayment or a self-adhering polymer-modified bitumen sheet, extending not less than 24 inches inside the exterior wall line. On roofs with slope 8:12 or greater, the ice barrier must also extend not less than 36 inches up-slope from the eave edge. Exception: detached accessory structures without conditioned floor area. About ice & water barrier
Mid-roof inspection
Required — Mid-roof inspections are scheduled when the roof is 100% dried in with no less than five rows of roof covering installed, up to 50% maximum; the roof cannot be completed until the mid-roof inspection is approved. A "Missed mid-roof inspection policy" allows uncovering 10% of the roof per side for inspection, or submitting an Alternative Method Request with a stamped engineer's/architect's letter, if the mid-roof step was missed.
Impact-resistant roofing
Not required — The Town's building code adopting ordinance (Ordinance No. 2026-017, adopted June 2, 2026, effective June 30, 2026, adopting the 2024 IRC and 2024 IBC with Town amendments) was reviewed in full, including the complete list of IRC amendments at CRMC 15.06.030 and the Town's IBC roofing amendments; it contains no impact-resistance or UL 2218 requirement, and it does not amend IRC Section R905.2.4. The roof-covering classification Castle Rock does require is a fire rating: Section 723.1.3 as added by that ordinance requires Class A, B or C roof coverings in accordance with IBC Section 1505, and the Town's 2025 Colorado Wildfire Resiliency Code re-roof guideline requires a roof covering or assembly classified as Class A when tested in accordance with ASTM E108 or UL 790 for properties in mapped fire-intensity areas. Those are fire classifications, not impact ratings.
Repair permit threshold
"SHINGLE REPAIR OR REPLACEMENT, WORK NOT EXCEEDING ONE SQUARE (100 SQUARE FEET IN AREA) OF COVERING PER BUILDING" is exempt from permit requirements (CRMC 15.06.030, IRC Section R105.2 as locally amended by Ordinance No. 2026-017) - i.e., a permit is required above that threshold.
Wind design criteria
Table R301.2(1) as amended by Ordinance No. 2026-017 (Section 15.06.030.F, adopted June 2, 2026, effective June 30, 2026, amending the 2024 IRC): Ground Snow Load "<6000' 30 PSF, 6000'-6499' 35 psf, 6500'-6999' 40 psf"; Wind Speed "115 mph Vult (Exposure is site specific)"; Topographic effects: No; Special wind region: No; Windborne debris zone: No; Seismic Design Category: B; Ice Barrier Underlayment Required: Yes.
Roof layer limit / recover
"SECTION R908.4, ROOF RECOVER, IS DELETED IN ITS ENTIRETY" (Section 15.06.030.K of Ordinance No. 2026-017, adopted June 2, 2026, effective June 30, 2026). The ordinance does not reproduce the text of the deleted section, so it does not state on its face whether any recover remains permitted under R908.3; confirm with the Town before bidding a recover.

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Roofing in Castle Rock, ColoradoCity hub

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The building permitting authority for the Town of Castle Rock in Douglas County. The Building Division issues residential reroofing permits through eTRAKiT and enforces the town's adopted building codes.

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Roofing questions — Castle Rock, CO

Do you need a permit to replace a roof in Castle Rock, CO?

Required. "SHINGLE REPAIR OR REPLACEMENT, WORK NOT EXCEEDING ONE SQUARE (100 SQUARE FEET IN AREA) OF COVERING PER BUILDING" is exempt from permit requirements (CRMC 15.06.030, IRC Section R105.2 as locally amended by Ordinance No. 2026-017) - i.e., a permit is required above that threshold.

Is ice & water shield required in Castle Rock, CO?

Required — Per CRMC 15.06.030 (Section R905.1.2, Ice barriers, as amended by Ordinance No. 2026-017, adopted 6/2/2026, effective 6/30/2026): an ice barrier shall be installed on eaves and valleys for asphalt shingles, metal roof shingles, mineral-surfaced roll roofing, slate and slate-type shingles, wood shingles, and wood shakes, consisting of not less than two layers of cemented underlayment or a self-adhering polymer-modified bitumen sheet, extending not less than 24 inches inside the exterior wall line. On roofs with slope 8:12 or greater, the ice barrier must also extend not less than 36 inches up-slope from the eave edge. Exception: detached accessory structures without conditioned floor area..

Is drip edge required?

Required.

Is a mid-roof inspection required?

Required — Mid-roof inspections are scheduled when the roof is 100% dried in with no less than five rows of roof covering installed, up to 50% maximum; the roof cannot be completed until the mid-roof inspection is approved. A "Missed mid-roof inspection policy" allows uncovering 10% of the roof per side for inspection, or submitting an Alternative Method Request with a stamped engineer's/architect's letter, if the mid-roof step was missed..

Do roofing contractors need a license or registration in Castle Rock, CO?

Required. Contractors must be registered to work in the Town of Castle Rock; general, roofing, and mechanical contractors must be registered with Douglas County..

What building code does Castle Rock, CO use?

2024 IBC, IRC, IMC and IPC, 2026 NEC, and 2021 IECC with Town of Castle Rock amendments, per Ordinance No. 2026-017 (adopted June 2, 2026; effective June 30, 2026).