Accessory Dwelling Unit (ADU) Construction in Gresham, OR — Costs $76,230 to $444,675
What does accessory dwelling unit (adu) construction cost in Gresham? Average $190,575, ranging $76,230–$444,675. Labor runs $43.23/hr locally — 27% above the national average. Free breakdown with material + labor split.
Gresham, OR Market
+27% vs nationalLabor Rate
$43.23/hr
Material Index
110
Avg Permit Cost
$1,617
Median Home Price
$395,000
Gresham is a mid-sized city in Oregon 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. At 27% above the national average, Gresham is one of the more expensive markets for home improvement — driven primarily by above-average labor rates in the region. The median home in Gresham is valued at $395,000, putting this project at about 48.2% of home value — a moderate investment with a projected 80% ROI.
Low Estimate
$76,230
National: $60,000
Mid-Range
$190,575
National: $150,000
High End
$444,675
National: $350,000
Per Sq Ft
$318
National: $250
Accessory Dwelling Unit (ADU) Construction Cost Calculator for Gresham
Adjusted for Gresham's labor rate ($43.23/hr) and material costs (index 110).
Mid-grade materials, good quality fixtures, standard options.
Estimated Total in Gresham
$190,575
Based on 200 sq ft at mid quality, adjusted for Gresham market rates.
Local Cost Breakdown
At Gresham's average rate of $43.23/hr (44% above national avg)
Material cost index 110 (10% above national baseline of 100)
Accessory Dwelling Unit (ADU) Construction vs. Home Value in Gresham
| Metric | Gresham | National Avg |
|---|---|---|
| Accessory Dwelling Unit (ADU) Construction (Mid-Range) | $190,575 | $150,000 |
| Median Home Price | $395,000 | $350,000 |
| Project as % of Home Value | 48.2% | 42.9% |
| Estimated ROI | 80% | 80% |
| Median Household Income | $52,000 | $75,000 |
What Affects the Price in Gresham
- 1Local labor rates ($43.23/hr in Gresham)
- 2Material cost index (110 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 Gresham, OR
Second Story Addition
$254,100
Room Addition
$114,345
Swimming Pool Installation
$80,366
Garage Addition
$69,878
Home Addition
$100,276
Inground Swimming Pool
$79,258
Attic Conversion
$70,815
Swimming Pool Construction
$64,378
Accessory Dwelling Unit (ADU) Construction in Other Oregon Cities
Planning a Accessory Dwelling Unit (ADU) Construction in Gresham
Building permits are typically required for a accessory dwelling unit (adu) construction in Gresham. The average permit fee in this area is $1,617, 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 Gresham, skilled contractors charge an average of $43.23/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.
For the median Gresham household earning $52,000/year, this project at $190,575 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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