How much does a garage addition cost in Renton, WA?

The average garage addition in Renton, WA costs $75,057 in 2026. Costs range from $34,117 for a basic project to $177,407 for a high-end renovation. Renton is 36% more expensive than the national average of $55,000.

What is the labor rate for contractors in Renton?

The average contractor labor rate in Renton, WA is $44.98/hour, compared to the national average of $30/hour. For a garage addition, labor typically accounts for 50% of the total cost, which is approximately $37,529 in Renton.

Are materials more expensive in Renton?

Renton has a material cost index of 123 (national average = 100). Materials cost about 23% more than the national average. For a garage addition, materials account for 50% of the cost, approximately $37,529.

Do I need a permit for a garage addition in Renton?

Yes, a garage addition typically requires building permits in Renton, WA. The average permit cost in Renton is $1,646. Always confirm requirements with the Renton building department before starting work.

Is a garage addition a good investment in Renton?

A garage addition provides an estimated 65% ROI nationally. In Renton, where the median home price is $560,000, this project costs about 13.4% of your home value. This is a moderate investment relative to home value — focus on features that appeal to buyers in the local market.

Garage Addition in Renton, WA — Costs $34,117 to $177,407

What does garage addition cost in Renton? Average $75,057, ranging $34,117–$177,407. Labor runs $44.98/hr locally — 36% above the national average. Free breakdown with material + labor split.

Renton, WA Market

+36% vs national

Labor Rate

$44.98/hr

Material Index

123

Avg Permit Cost

$1,646

Median Home Price

$560,000

Renton is a mid-sized city in Washington with a healthy pool of local contractors. Homeowners generally have several options to compare for a garage addition, which helps keep pricing competitive. At 36% above the national average, Renton is one of the more expensive markets for home improvement — driven primarily by above-average labor rates in the region. With a median home price of $560,000, this garage addition represents just 13.4% of typical home value — a relatively small investment that can significantly boost curb appeal or functionality.

Low Estimate

$34,117

National: $25,000

Mid-Range

$75,057

National: $55,000

High End

$177,407

National: $130,000

Per Sq Ft

$102

National: $75

Duration: 4-8 weeks

DIY: Hard

Permits: Required

ROI: 65%

Garage Addition Cost Calculator for Renton

Adjusted for Renton's labor rate ($44.98/hr) and material costs (index 123).

Project Size: 200 sq ft

50 sq ft1,000 sq ft

Quality Level

Mid-grade materials, good quality fixtures, standard options.

Estimated Total in Renton

$75,057

Based on 200 sq ft at mid quality, adjusted for Renton market rates.

Local Cost Breakdown

Labor (50%)$37,529

At Renton's average rate of $44.98/hr (50% above national avg)

Materials (50%)$37,529

Material cost index 123 (23% above national baseline of 100)

Garage Addition vs. Home Value in Renton

Metric	Renton	National Avg
Garage Addition (Mid-Range)	$75,057	$55,000
Median Home Price	$560,000	$350,000
Project as % of Home Value	13.4%	15.7%
Estimated ROI	65%	65%
Median Household Income	$68,000	$75,000

What Affects the Price in Renton

1Local labor rates ($44.98/hr in Renton)
2Material cost index (123 vs national 100)
3Number of bays
4Attached vs detached
5Finished interior
6Loft storage

Popular Upgrades

Finished interior
Loft storage
EV charger circuit

Other Projects in Renton, WA

Second Story Addition

$272,933

HardROI 60%

Accessory Dwelling Unit (ADU) Construction

$204,700

HardROI 80%

Room Addition

$122,820

HardROI 55%

Swimming Pool Installation

$86,953

HardROI 40%

Home Addition

$108,096

MediumROI 60%

Inground Swimming Pool

$86,077

HardROI 43%

Attic Conversion

$75,797

HardROI 64%

Swimming Pool Construction

$68,907

Professional OnlyROI 43%

Garage Addition in Other Washington Cities

Seattle, WA

$83,719

+12%Pop. 737,015

Spokane, WA

$75,964

+1%Pop. 228,989

Tacoma, WA

$66,110

-12%Pop. 219,346

Vancouver, WA

$70,437

-6%Pop. 190,915

Bellevue, WA

$82,262

+10%Pop. 151,854

Kent, WA

$65,881

-12%Pop. 136,588

Everett, WA

$72,261

-4%Pop. 110,629

Spokane Valley, WA

$75,093

SamePop. 103,597

Planning a Garage Addition in Renton

Building permits are typically required for a garage addition in Renton. The average permit fee in this area is $1,646, though costs vary based on project scope. Permit fees in this market are above average — factor them into your total budget. Plan for 4-8 weeks from start to finish.

A garage addition is a complex project best left to licensed professionals. In Renton, skilled contractors charge an average of $44.98/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.

For the median Renton household earning $68,000/year, this project at $75,057 represents a significant investment. Consider financing options or phasing the work to spread costs over time.

Garage Addition — National Guide

See the full national cost guide with DIY tips, cost factors, and ROI analysis.

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