ADU feasibility checker

1
2
3
4

Step 1 of 4
Where is your property?
ADU rules vary significantly by state. Select yours to get accurate requirements.
🌴CaliforniaMost ADU-friendly
☀️FloridaSB-48 expanding rules
⭐TexasCity-by-city rules
🌲WashingtonHB 1337 expanded
🏔️ColoradoNew 2025 mandate
🗽New YorkNew ADU rules 2025
🌧️OregonProgressive ADU laws
🍑GeorgiaAtlanta-led growth
🌵ArizonaADU-friendly laws
🗺️Other StateAll 50 states covered
Continue →

Step 2 of 4
Tell us about your lot
These numbers determine what size ADU your property can support.
Lot size (sq ft) *

Primary home size (sq ft) *

Zoning district
Select if knownR-1 (Single Family)R-2 (Low Density Res.)R-3 (Medium Density)Multifamily ResidentialAgricultural / RuralNot sure
HOA / Deed restrictions?
Select oneNo HOAHOA – not sure about ADUsHOA – ADUs allowedHOA – ADUs restricted
Flood zone or coastal area?
No – standard lotUnsure / possibleYes – flood zone / coastalYes – High Velocity Hurricane Zone (FL)
← Back
Continue →

Step 3 of 4
What type of ADU?
Each type has different cost, timeline, and site requirements.
🏡Detached ADUNew backyard structure
🏠Attached ADUAddition to main home
🚗Garage ConversionConvert existing garage
🏗️Basement / InteriorConvert existing space
Intended use
Long-term rental
Family / in-law suite
Short-term (Airbnb)
Home office
Increase property value
Desired ADU size (sq ft)
Not sure yet~400 sq ft (Studio)~600 sq ft (1 bed)~800 sq ft (1–2 bed)~1,000 sq ft (2 bed)~1,200 sq ft (2–3 bed)
← Back
Continue →

Step 4 of 4 — Almost there
A few more details
This helps us flag any extra hurdles specific to your situation.
Which apply to your property?
Historic district
Steep / sloped lot
Septic system
Lot under 5,000 sq ft
None of the above
Do you have a garage?
Yes – attached
Yes – detached
No garage
← Back
Check My Feasibility →