Lafayette allows a detached accessory dwelling unit by right on most single-family lots. Here is exactly what the code permits — size, setbacks, parking, and owner-occupancy — each point cited to the adopted regulations.
Every figure below is drawn from Lafayette's adopted ADU regulations. The exact setbacks for your parcel depend on its zoning — the ADU finder reads them off your parcel.
Permitted by right
Yes
Approved through the normal building-permit process — no discretionary hearing.
Maximum size
Up to 750 sq ft
Detached ADU ≤ 750 sf (accessory-building max = the lesser of 10% of lot area or 750 sf). Lafayette Municipal Code §26-14-19.
Owner-occupancy
Not required
You don't have to live on-site — Colorado's HB24-1152 bars owner-occupancy mandates for subject jurisdictions.
Off-street parking
None required
No ADU parking minimum — Colorado HB24-1152 prohibits parking minimums for subject jurisdictions (narrow exceptions only).
Setbacks
Your zone's accessory setbacks
A detached ADU follows this city's accessory-structure setbacks, which vary by zoning district. Enter your address in the ADU finder and we'll pull your parcel and show the exact side, rear, and front lines on it.
Source
Lafayette Municipal Code §26-14-19 (ADU ≤ 750 sf); Lafayette ADU regulations updated 2025 (DOLA-reviewed, designated an 'ADU Supportive Jurisdiction'); Colorado HB24-1152 (eff. June 30, 2025 — ADUs by right/administrative, no owner-occupancy mandate, rear setback ≤ 5 ft)
This is a plain-language summary for planning, not a legal determination. Codes are amended; confirm the current requirements with Lafayette and a design professional before you rely on them.
A subject jurisdiction must allow at least one ADU by right (administrative — no discretionary review or public hearing) on any lot where a single-unit detached dwelling is an allowed use, and may not impose owner-occupancy mandates, ADU-specific minimum lot size, parking minimums (narrow exceptions only), or design standards stricter than the primary dwelling. It took effect June 30, 2025. That is why cities like Lafayette now approve a backyard home administratively — and why owner-occupancy and parking mandates are largely gone.
We keep cited ADU rules for every city below. Switch to yours.
Enter your address and we pull your parcel lines and your district’s ADU setbacks. Trace your house, place one of our plans, and see what fits and what it would cost — in a few minutes.
Keep exploring
ADU rules by city
Cited, city-by-city ADU rules across the Front Range.
Questions answered
Allowed, how big, what it costs, how long — answered from the adopted codes.
How the finder works
What to type, what you get back, and what it deliberately will not tell you.
Rental income potential
Rent, resale value, and what a permitted second unit adds to your property.
ADUs for family
Aging parents, multigenerational living, childcare.
How to finance an ADU
HELOC, construction loans, and CHFA options.
Process & timeline
What to expect from contract to move-in.
Floor plans & pricing
Five plans, three finish grades, five architectural styles.
About Addwell
Who we are and how we build.