ADUs, Casitas & Guest Houses
The rules, costs, and design of accessory dwellings - casitas, guest houses, and ADUs across the Phoenix metro.
- How do you cool a casita or guest suite separately from the main house in Arizona?
- Does adding a casita or addition raise my property taxes in Arizona?
- Can I add a casita or living space to an RV garage?
- Can I build a guest house without a kitchen in Arizona (and why would I)?
- Can I convert a guest house into a rentable ADU in Arizona?
- Can I rent out my casita or ADU in Scottsdale, Arizona?
- Can my HOA block an ADU even if the city allows it?
- Casita vs guest house vs ADU: what's the difference in Arizona?
- Do Cave Creek, Fountain Hills, and Carefree allow casitas and ADUs?
- How much does it cost to build a casita in Arizona?
- How much does it cost to build an ADU in Arizona?
- What are Arizona's ADU requirements for setbacks, size, and utilities?
- What are the ADU and casita rules in Mesa, Arizona?
- What are the ADU and casita rules in Phoenix, Arizona?
- What are the ADU and casita rules in Scottsdale, Arizona?
- What are the ADU setback and size rules by city in Arizona?
- What is an ADU in Arizona and what are the rules?
- Where should you place a casita or guest suite in a custom home layout?
- Why did the plan reviewer reject my casita or guest-house bedroom egress?
- How do I add a casita or detached structure to an existing Arizona home?

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