Accessory Dwelling Unit (ADU) Construction in Kent, WA — Costs $71,870 to $419,242
What does accessory dwelling unit (adu) construction cost in Kent? Average $179,675, ranging $71,870–$419,242. Labor runs $37.37/hr locally — 20% above the national average. Free breakdown with material + labor split.
Kent, WA Market
+20% vs nationalLabor Rate
$37.37/hr
Material Index
115
Avg Permit Cost
$1,501
Median Home Price
$465,219
Kent is a mid-sized city in Washington 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 20% above the national average, Kent is one of the more expensive markets for home improvement — driven primarily by above-average labor rates in the region. The median home in Kent is valued at $465,219, putting this project at about 38.6% of home value — a moderate investment with a projected 80% ROI.
Low Estimate
$71,870
National: $60,000
Mid-Range
$179,675
National: $150,000
High End
$419,242
National: $350,000
Per Sq Ft
$299
National: $250
Accessory Dwelling Unit (ADU) Construction Cost Calculator for Kent
Adjusted for Kent's labor rate ($37.37/hr) and material costs (index 115).
Mid-grade materials, good quality fixtures, standard options.
Estimated Total in Kent
$179,675
Based on 200 sq ft at mid quality, adjusted for Kent market rates.
Local Cost Breakdown
At Kent's average rate of $37.37/hr (25% above national avg)
Material cost index 115 (15% above national baseline of 100)
Accessory Dwelling Unit (ADU) Construction vs. Home Value in Kent
| Metric | Kent | National Avg |
|---|---|---|
| Accessory Dwelling Unit (ADU) Construction (Mid-Range) | $179,675 | $150,000 |
| Median Home Price | $465,219 | $350,000 |
| Project as % of Home Value | 38.6% | 42.9% |
| Estimated ROI | 80% | 80% |
| Median Household Income | $87,006 | $75,000 |
What Affects the Price in Kent
- 1Local labor rates ($37.37/hr in Kent)
- 2Material cost index (115 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 Kent, WA
Second Story Addition
$239,567
Room Addition
$107,805
Swimming Pool Installation
$77,237
Garage Addition
$65,881
Home Addition
$95,444
Inground Swimming Pool
$76,926
Attic Conversion
$66,144
Swimming Pool Construction
$60,131
Accessory Dwelling Unit (ADU) Construction in Other Washington Cities
Planning a Accessory Dwelling Unit (ADU) Construction in Kent
Building permits are typically required for a accessory dwelling unit (adu) construction in Kent. The average permit fee in this area is $1,501, 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 Kent, skilled contractors charge an average of $37.37/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.
With a median household income of $87,006, many Kent residents can budget for this project through savings. The mid-range cost of $179,675 represents 207% of the typical household's annual income.
Accessory Dwelling Unit (ADU) Construction — National Guide
See the full national cost guide with DIY tips, cost factors, and ROI analysis.
All Construction Costs in Kent
View labor rates, material costs, and project estimates for Kent, WA.
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