Mercer Island, WA · GC
GENERAL CONTRACTING Builder in Mercer Island, WA
When your project doesn't fit a clean ADU bucket, we run the whole program — design coordination, scheduling, trades, inspections, and budget management. One contract, one supervisor, one final number.
Build timeline
Project dependent
Typical sqft
Any
Mercer Island cost
Custom
Permit window
12–16 wk
What general contracting looks like in Mercer Island
GENERAL CONTRACTING projects in Mercer Island are shaped by local zoning (R-8.4 / R-9.6 / R-12), a lot minimum of 8,400 sqft, and the kinds of sites we see day-to-day: North End, First Hill, Mid-Island. Below is what every Mercer Island GC project from Golden State includes — fixed-price, one contract, one warranty.
- ✓Pre-construction estimating
- ✓Design coordination
- ✓Trade procurement + scheduling
- ✓Weekly progress reporting
- ✓Quality + safety supervision
- ✓Final close-out package
Other services in Mercer Island
More from Golden State ADU in Mercer Island
DADU
DETACHED ADU in Mercer Island
Stand-alone backyard cottages built from the ground up — engineered for rental income, multi-generational living, or your home office.
AADU
ATTACHED ADU in Mercer Island
Seamlessly integrated additions — basement, ground-floor, or wing conversions that maintain the architectural integrity of your existing home.
Garage
GARAGE CONV. in Mercer Island
Convert an under-used garage into a high-end studio, office, or rental quarter without surrendering your driveway.
Additions
MODERN ADDITIONS in Mercer Island
Structural expansions for growing families — second stories, primary suites, kitchen extensions. Steel, glass, and Pacific Northwest materials.
Feasibility
FEASIBILITY STUDIES in Mercer Island
Before you commit, we analyze zoning, lot coverage, setbacks, utilities, and ROI so you have a real number — not a guess.
GENERAL CONTRACTING across the Puget Sound
GENERAL CONTRACTING builders in nearby cities
Start your Mercer Island GC feasibility
$1,500 buys lot analysis, Mercer Island zoning verification, and a fixed price you can build a budget on.
Request Mercer Island feasibilityFrequently asked
What is included in GENERAL CONTRACTING in Mercer Island?
Our GENERAL CONTRACTING in Mercer Island scope includes design through completion: feasibility, schematic design, construction documents, permit submittal and review management, construction with one self-performed framing crew plus L&I-licensed MEP subcontractors, all required WA inspections, certificate of occupancy, and warranty. One contract, one license number, one warranty — not a coordination headache across five vendors.
How is GENERAL CONTRACTING in Mercer Island different from a generic remodel?
GENERAL CONTRACTING in Mercer Island carries code, permit, and construction details that a one-off remodeler hasn't repeated enough times to optimize. Examples: IECC R406 envelope path selection, fire separation when units are within 5 ft, side-sewer slope requirements, IRC Appendix AQ when permitted as a tiny house, separate utility metering rules. We do this scope every month — repetition is what makes our first-cycle approval rate and our schedule reliability stand out.
What is the typical price range for GENERAL CONTRACTING in Mercer Island?
GENERAL CONTRACTING in Mercer Island pricing in 2026 lands in the $295–$465/sqft all-in range depending on size, lot conditions, finish tier, and AHJ. The wide range is real — small lots with difficult access, soils requiring pier-and-beam, or service upgrades push the upper end; flat lots with good access and a catalog plan land at the lower end. Our feasibility report gives you a ±15% number tailored to your specific lot in two weeks.