(720) 287-7958

Start with ADU feasibility — then a real estimate

How big can my ADU be?

Enter an address above for an illustrative preview.

How big can my ADU be?

Enter your address. We look up cited size, height, and setbacks for your lot — cities from Castle Rock to Boulder.

  • Cited ADU size and height — we never invent a district
  • See the envelope on a 3D lot and a site plan
  • An address is enough to start

The cottage above is a sketch — not a lot and not a zoning district.

Illustrative only — not a code determination or permit approval.

Start with ADU feasibility — then a real estimate

Enter a Denver-metro address to explore illustrative ADU sizing. Results are not a permit determination. When you are ready, continue to a clear estimate with Autotelic—(720) 287-7958.

Continue to instant estimateCall (720) 287-7958

ADU & backyard cottage service overviewContinue to your instant estimateADU cost & timelineOptional: Concept Studio (design that builds)Floor plan playground (plan the rooms)

ADU feasibility FAQ

Can I build an ADU on my lot?
It depends on lot size, setbacks, HOA rules, and your city’s code. Autotelic helps assess feasibility—we do not invent zoning envelopes or guarantee permit outcomes.
Is the online sizing tool a permit determination?
No. Lot-aware sizing on /adu/ is illustrative only and is not a permit determination. A clear estimate and local review come next.
What happens after I start an estimate?
You move from feasibility into a clear estimate with the same design-build team, then permit coordination and build with a licensed Denver-metro crew when you proceed.
What will an ADU cost?
The lot lookup is free. Our ADU cost page shows planning ranges for a detached backyard cottage; your lot, utility connections and finishes affect the price. Start an estimate for your project, or call (720) 287-7958 to talk it through. A fixed-price build proposal comes after feasibility.
Who builds the ADU?
Autotelic’s local design-build team takes your project from the first concept through an estimate, permits and construction. You have one team to talk to along the way.