Accessory Dwelling Unit (ADU) Construction in Tempe, AZ — Costs $57,380 to $334,717
What does accessory dwelling unit (adu) construction cost in Tempe? Average $143,450, ranging $57,380–$334,717. Labor runs $28.28/hr locally — 4% below the national average. Free breakdown with material + labor split.
Tempe, AZ Market
-4% vs nationalLabor Rate
$28.28/hr
Material Index
97
Avg Permit Cost
$1,479
Median Home Price
$421,717
Tempe is a mid-sized city in Arizona with a healthy pool of local contractors. Homeowners generally have several options to compare for a accessory dwelling unit (adu) construction, which helps keep pricing competitive. Tempe offers slightly below-average renovation costs, giving homeowners a small cost advantage compared to most US markets. The median home in Tempe is valued at $421,717, putting this project at about 34.0% of home value — a moderate investment with a projected 80% ROI.
Low Estimate
$57,380
National: $60,000
Mid-Range
$143,450
National: $150,000
High End
$334,717
National: $350,000
Per Sq Ft
$239
National: $250
Accessory Dwelling Unit (ADU) Construction Cost Calculator for Tempe
Adjusted for Tempe's labor rate ($28.28/hr) and material costs (index 97).
Mid-grade materials, good quality fixtures, standard options.
Estimated Total in Tempe
$143,450
Based on 200 sq ft at mid quality, adjusted for Tempe market rates.
Local Cost Breakdown
At Tempe's average rate of $28.28/hr (6% below national avg)
Material cost index 97 (3% below national baseline of 100)
Accessory Dwelling Unit (ADU) Construction vs. Home Value in Tempe
| Metric | Tempe | National Avg |
|---|---|---|
| Accessory Dwelling Unit (ADU) Construction (Mid-Range) | $143,450 | $150,000 |
| Median Home Price | $421,717 | $350,000 |
| Project as % of Home Value | 34.0% | 42.9% |
| Estimated ROI | 80% | 80% |
| Median Household Income | $76,353 | $75,000 |
What Affects the Price in Tempe
- 1Local labor rates ($28.28/hr in Tempe)
- 2Material cost index (97 vs national 100)
- 3Attached vs detached
- 4Size and bedroom count
- 5Kitchen and bath quality
- 6Local ADU regulations
Popular Upgrades
- Full kitchen
- Separate entrance
- Solar panels for energy independence
Other Projects in Tempe, AZ
Second Story Addition
$191,267
Room Addition
$86,070
Swimming Pool Installation
$62,339
Garage Addition
$52,598
Home Addition
$76,616
Inground Swimming Pool
$62,428
Attic Conversion
$52,523
Swimming Pool Construction
$47,748
Accessory Dwelling Unit (ADU) Construction in Other Arizona Cities
Planning a Accessory Dwelling Unit (ADU) Construction in Tempe
Building permits are typically required for a accessory dwelling unit (adu) construction in Tempe. The average permit fee in this area is $1,479, though costs vary based on project scope. Permit fees in this market are above average — factor them into your total budget. Plan for 6-18 months from start to finish.
A accessory dwelling unit (adu) construction is a complex project best left to licensed professionals. In Tempe, skilled contractors charge an average of $28.28/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.
For the median Tempe household earning $76,353/year, this project at $143,450 represents a significant investment. Consider financing options or phasing the work to spread costs over time.
Accessory Dwelling Unit (ADU) Construction — National Guide
See the full national cost guide with DIY tips, cost factors, and ROI analysis.
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