Egress Windows in Lafayette, CO
Last updated
Lafayette is on the 2024 IRC, and its checklist requires engineering for every egress window cut as a new opening in a foundation wall.
Permits are issued by the City of Lafayette Planning & Building Department (Window and Door Permit Checklist 2026).
Lafayette is on the 2024 codes
Lafayette's 2026 checklists cite the 2024 IRC and IECC plus the Lafayette Colorado Building Code 2026. Most metro cities in this plan are on the 2021 IRC.
Window & door permit checklist (key egress items)
- "All egress windows engineered when new openings are established in foundation walls."
- Engineering is required for structural elements "when making openings larger".
- Egress windows for sleeping rooms: 5.7 sq ft net clear (5.0 at grade), 24 in high, 20 in wide, sill no higher than 44 in.
- Energy limits: windows max U-factor 0.32 and max SHGC 0.40 (Climate Zone 5).
- Inspections: Building Rough (if openings are altered) and Building Final, with city-stamped plans on site. (checklist)
Basement finishes
The Basement Permit Checklist 2026 requires floor plans that show the "Locations of egress window wells and/or walk-out basement". It also requires wall details including floating walls, and MEP details. All submittals are electronic.
Lafayette FAQ
- Does my new egress window need an engineer? Per Lafayette's checklist, yes, when it's a new opening in a foundation wall.
- Will my replacement window pass? It has to meet U-0.32 and SHGC-0.40, plus egress sizing if it serves a sleeping room.
Permit fees
Fees and taxes are set by the jurisdiction; see the official Building Permit Fee Schedule for current amounts.
Services
Egress windows · Window wells · Covers · Basement egress · Code guide
Frequently asked questions
Who issues egress window permits in Lafayette?
The City of Lafayette Planning & Building Department.
Which code does Lafayette use?
Lafayette's 2026 checklists cite the 2024 IRC and IECC plus the Lafayette Colorado Building Code 2026.
Does my new egress window need an engineer?
Per Lafayette's checklist, yes, when it's a new opening in a foundation wall.
What size egress window does Lafayette require for a sleeping room?
5.7 sq ft net clear (5.0 at grade), 24 in high, 20 in wide, with a sill no higher than 44 in.
Will my replacement window pass?
It has to meet a max U-factor of 0.32 and max SHGC of 0.40, plus egress sizing if it serves a sleeping room.
How are Lafayette permit fees calculated?
They are valuation-based (2026). Check the official fee schedule linked on this page for current amounts.