ADU & Small House Plans · Scottsdale, AZ
ADU and Small House Plans in Scottsdale, AZ
Looking to buy ADU and small house plans in Scottsdale, AZ? HousePlans USA draws ADU and small house plans from scratch for the Scottsdale, AZ area. Two or more designers sketch concepts for your lot, you pick your favorite, and permit-ready plans arrive in as little as 24 hours.
From $1,050 · free customization · 30 days of free revisions · pay 75% to start
Why buy ADU and small house plans for Scottsdale, AZ from us
Small homes work harder than big ones: every foot has to earn its place. A backyard ADU can house a parent, earn rent or become a home office.
We draw studios, one- and two-bedroom cottages, garage apartments and affordable starter homes to your city's size, height, setback and parking rules.
ADU rules handled
Size, height, setback and parking limits are checked for your lot before concepts begin.
Live large in less
Vaulted ceilings, lofts and built-in storage make small rooms feel open.
Build it again
PDF unlimited build rights for $395 let you reuse the plan on more lots.
What's included in your ADU and small house plans
- Studio, 1-bedroom and 2-bedroom layouts
- Garage apartment with fire separation details
- Utility routing from the main house
- Aging-in-place details on request
- Unlimited-build rights available for investors
Plan prices by size
| Up to 1,000 sq ft | $1,050 |
| 1,001 – 1,500 sq ft | $1,295 |
| 1,501 – 2,000 sq ft | $1,495 |
| 2,001 – 2,500 sq ft | $1,695 |
| 2,501 – 3,000 sq ft | $1,895 |
| 3,001 – 3,500 sq ft | $2,195 |
Arizona engineer stamp from $750. See every option on our pricing page.
Where to get your Scottsdale building permit
Custom homes need a complete sealed plan set and a water pressure test before the permit can be issued.
Checked November 2026. Offices and rules change, so confirm with the office before you apply.
Building requirements
Building a house in Scottsdale, AZ: what the code requires
Codes adopted locally (no mandatory statewide code)
- Building code
- No statewide residential building code. Cities and counties adopt an IRC edition with local amendments (Phoenix, Tucson, Maricopa County, etc.).
- Energy code
- Energy codes are adopted locally and vary widely by jurisdiction.
- Climate zone
- IECC climate zone 2–5. Insulation, windows and HVAC are sized to match.
- Typical frost depth
- 0–12 in (low desert), 18–30 in (northern AZ). Footings must extend below the local frost line (confirm with your building department).
- Foundations
- Slab-on-grade is the most common and cost-effective choice.
- Who can draw the plans
- Single-family homes can generally be designed by a non-licensed home designer. A licensed engineer's stamp is often required for structural items, engineered foundations or special hazard zones, or when the local building official asks for it.
- Engineer stamp
- If your jurisdiction requires sealed drawings, add our Arizona Engineer Stamp / Permit-Ready package ($750).
Arizona-specific rules & hazards
- Northern Arizona (Flagstaff) has high ground snow loads and wildfire (WUI) rules.
- Many counties require a separate grading/drainage permit and an ADEQ-approved septic system outside sewer areas.
- Wildfire-resistant materials and defensible-space detailing
Summary for planning only. Codes, editions and local amendments change, so always confirm current requirements with the building department that will issue your permit. Our designers check your jurisdiction before drawing.
Cottage homes we can draw for Scottsdale, AZ
Style inspiration photos, not homes built in Scottsdale, AZ or by HousePlans USA.
How ordering works
- 1
Get inspired
Pick the exterior styles and interior looks you love, or paste links to plans you've seen online.
- 2
Design & instruct
Choose rooms, size, basement, garage and your state, and tell our designers exactly what you want.
- 3
Compare 2+ concepts
Two or more designers each sketch a concept. Pick your favorite designer to draw the full plans.
- 4
Download & revise
Plans arrive by email and in your dashboard by your deadline. Revisions are free for 30 days.
Full guide: ADU and small house plans in Arizona
ADU and Small House Plans in Scottsdale, AZ: FAQ
Can I build an ADU in Scottsdale, AZ?+
In many cities, yes, but size, setback and parking rules vary. We check your lot's rules before we sketch.
Do you draw garage apartments?+
Yes. We draw one- and two-bedroom apartments over garages, including the required fire separation.
How much do ADU and small house plans cost in Scottsdale, AZ?+
Custom plans start at $1,050 for homes up to 1,000 sq ft and are priced by size. Most family homes come to $2,000–$3,000 all-in, with free customization and 30 days of revisions.
How fast can I get ADU and small house plans for Scottsdale, AZ?+
Standard delivery is 10 business days. Priority, Express, Rush (48 hours) and Super Rush (24 hours, up to 3,000 sq ft) are available at checkout.
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