Licensed & bonded contractors with verified credentials • Transparent flat-rate pricing, no surprise bills • 24/7 emergency hotline for landlord support • All work permitted and code-compliant Serving Downtown Mercer Island, East Seattle, North End, South End and all Mercer Island neighborhoods
Fast, reliable solutions for Mercer Island landlords and property owners


Every room addition contractor in our Mercer Island network is background-checked, licensed, bonded, and insured with established track records. We've already done the vetting so you don't waste time interviewing unreliable contractors or dealing with permit violations.
Get detailed written estimates before work begins on your rental property. Our contractors provide itemized quotes for materials, labor, and permit costs, no hidden fees or surprise invoices that eat into your rental income.
Room additions require proper permits and inspections in Mercer Island. Our contractors handle all permit applications, keep work meets Washington State building codes, and coordinate required inspections so your project stays compliant and protects your investment.
We understand you're managing this remotely while tenants are in place. Our contractors coordinate schedules around tenant availability, provide progress updates directly to you, and minimize disruption to your rental income during construction.
Room additions are major investments in your rental property. Our contractors use quality materials that meet code requirements and provide warranties on their work, so your addition adds lasting value to your Mercer Island rental.
Mercer Island landlords trust Valta Homes for room addition projects across the entire island, from East Mercer Way properties to homes near Town Center and the First Hill neighborhood. Our contractor network serves rental properties throughout Mercer Island and extends to nearby Bellevue, Seattle, and all of King County. adding a bedroom to increase rental value or expanding living space in a multi-family property, our vetted contractors understand local permitting requirements and deliver quality construction that protects your investment.
Background-checked, licensed, bonded & insured
Top-rated pros with proven track records
Every job reviewed, customer feedback matters
Fair pricing, no upsells, no shortcuts
We only work with pros we'd trust in our own homes.
How quickly can a contractor assess my room addition project?
Common questions about Room Additions in Mercer Island
Join Valta Homes membership for room addition contractor support in Mercer Island and all of King County