Full-service general contracting in Seattle. home renovations, remodeling, and construction projects. Licensed, insured, and backed by a 10-year warranty.
Some projects go beyond a single service. When your home needs a kitchen remodel, a room addition, structural repairs, or a whole-house renovation, you need a general contractor who can manage the full scope, from planning and permits through construction and final inspection.
K Single Corp has been serving homeowners across King, Snohomish, and Pierce County since 2007. With over 15,000 completed projects, we bring the same attention to detail and craftsmanship to our general contracting work that we’re known for in roofing, siding, and exterior services. We hold Washington State contractor license #KSINGSC842B3 and are fully bonded and insured for residential construction and renovation.
Our general contracting services cover a broad range of residential projects:
Kitchen Remodels. From layout reconfiguration and cabinet installation to countertops, backsplash, flooring, and appliance installation. We coordinate plumbing, electrical, and HVAC modifications as needed and manage the entire project from demo through final finish.
Bathroom Renovations. Full bathroom remodels including layout changes, tile work, vanity and fixture installation, plumbing updates, ventilation improvements, and waterproofing. We pay particular attention to moisture management in bathrooms, especially critical in the PNW where interior humidity levels run high.
Room Additions. Adding square footage to your home, whether it’s a bedroom, family room, home office, or accessory dwelling unit (ADU). Room additions involve foundation work, framing, roofing, siding, electrical, plumbing, insulation, and interior finishing. We manage the entire build from permit approval to certificate of occupancy.
Structural Repairs. Rotted framing, failing support beams, foundation issues, and water damage repair. Many PNW homes, especially those built in the 1950s-1980s in areas like Burien, White Center, Tukwila, and Renton, have accumulated moisture damage over the decades that requires structural attention.
Whole-House Renovations. Comprehensive updates that touch every system in the home. We’ve renovated mid-century ramblers, updated 1970s split-levels, and modernized Craftsman homes throughout the Seattle metro. Whole-house renovations are complex projects that require careful sequencing. We create a detailed construction schedule and manage every phase.
Exterior Upgrades. Combining roofing, siding, painting, gutters, decks, and windows into a single coordinated project. This is where our dual expertise as both a specialty contractor and general contractor shines. We self-perform the exterior trades we specialize in and coordinate any additional work seamlessly.
Managing a renovation requires clear communication, realistic planning, and disciplined execution. Here’s how we approach every project:
1. Initial Consultation. We meet at your home to understand your goals, assess the existing conditions, and discuss your budget and timeline expectations. We’ll walk through the space together and talk through what’s possible, what’s practical, and what the project will realistically require.
2. Design and Planning. For projects that require architectural plans, we coordinate with designers and architects, or we can develop construction plans in-house for simpler projects. We identify permit requirements, structural engineering needs, and any specialty consultants required.
3. Detailed Estimate. You’ll receive an itemized, fixed-price estimate that breaks down every component of the project. We don’t use vague allowances or surprise you with change orders for work that should have been anticipated. If we foresee potential issues (like the likelihood of hidden rot in an older home), we discuss contingency options upfront.
4. Permits and Approvals. We prepare and submit all permit applications, coordinate with the building department, and schedule inspections at each required phase. Navigating permits across different jurisdictions (Seattle, Bellevue, Kirkland, Renton, Burien, and others) is something we do every week.
5. Construction. We execute the project according to the approved plans and schedule. Our project management approach includes weekly progress updates, proactive communication about any schedule changes, and daily site cleanup. We coordinate all trades (electrical, plumbing, HVAC, and specialty work) to keep the project moving efficiently.
6. Quality Control. We inspect work at every phase: framing, rough-in, insulation, drywall, and finish. Problems caught early are easy to fix; problems caught late are expensive to fix. Our quality control process ensures the finished product meets both code requirements and our standards.
7. Final Inspection and Warranty. We schedule the final building inspection, address any punch-list items, and conduct a thorough walkthrough with you. When you’re satisfied, we activate your 10-year workmanship warranty and hand over all documentation, warranties, and permit records.
Many general contractors are essentially project managers. They subcontract every trade and add a markup. That model works, but it adds cost and creates distance between the GC and the actual work being performed.
At K Single Corp, we self-perform a significant portion of the work on our projects. Roofing, siding, painting, gutters, and decks are all done by our own trained crews. This means better quality control, lower costs (no subcontractor markup on those trades), and more accountability. For specialty trades like electrical, plumbing, and HVAC, we work with a vetted network of licensed subcontractors we’ve trusted for years.
We carry full general liability insurance and workers’ compensation coverage on every project. Our Washington State contractor license #KSINGSC842B3 is current, our bond is active, and we maintain all required coverage. You can verify our license status anytime through the Washington State Department of Labor and Industries.
We don’t ask for large upfront deposits. Our standard payment structure is based on project milestones: you pay as work is completed and inspected. This protects your investment and ensures alignment throughout the project.
We provide general contracting services throughout King County, Snohomish County, and Pierce County, including Seattle, Bellevue, Kirkland, Redmond, Renton, Kent, Burien, Federal Way, Tacoma, Puyallup, Everett, Lynnwood, Edmonds, and all surrounding communities.
Call K Single Corp at (206) 659-4349 for a free consultation on your next renovation project.
When your project involves multiple trades like roofing, siding, windows, and decking, having one general contractor manage everything means better coordination, fewer delays, and consistent quality across every phase.
K Single Corp holds a Washington State General Contractor license with full bonding and insurance. Your project is protected from start to finish, and every subcontractor we bring in meets our quality standards.
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Free estimates with no obligation. We respond within one business day.
Real work on real homes across the Puget Sound.
Bellevue
Complete roof replacement, partial siding replacement, five window replacements, new front entry, exterior paint, foundation plantings.
Bothell
Full roof replacement with Malarkey Vista AR shingles, James Hardie siding on two elevations, seamless gutters, full exterior repaint, new front door and hardware.
University Place
Composition shingle reroof, partial vinyl siding replacement, 200 sq ft deck rebuild, full exterior repaint, new garage door.
From first call to final walkthrough. Here's how we work.
We inspect your roof, discuss your needs, and provide a detailed, no-obligation estimate, typically within 48 hours.
You receive a clear, itemized quote with material options, timeline, and warranty details. No hidden costs.
Our experienced crew handles your project with care: quality materials, clean worksite, and daily progress updates.
We walk the completed project with you, ensure everything meets our standards, and activate your 10-year workmanship warranty.
We offer payment plans to fit your budget. Ask about financing options during your free estimate.
We handle a wide range of residential renovation and construction projects, from kitchen and bathroom remodels to room additions, structural repairs, whole-house renovations, and exterior upgrades. Our general contracting services complement our specialty work in roofing, siding, painting, and decks, giving you a single contractor who can manage the entire scope of your project without subcontracting everything out.
Yes. K Single Corp holds Washington State contractor license #KSINGSC842B3. We are fully licensed, bonded, and insured with general liability and workers' compensation coverage on every project. Our license allows us to perform general contracting work across King, Snohomish, and Pierce County. You can verify our license status anytime through the Washington State Department of Labor and Industries.
We provide detailed, itemized estimates for every project before work begins, no vague allowances or ballpark figures. Our estimates break down materials, labor, permits, and any subcontractor costs line by line. We use a fixed-price contract model on most projects, so you know your total cost upfront. If we encounter unexpected conditions (like hidden rot or structural issues), we discuss the additional cost with you before proceeding.
Timelines vary widely by project scope. A bathroom remodel might take 3-5 weeks. A kitchen renovation typically runs 6-10 weeks. Room additions and major renovations can take 3-6 months. We provide a detailed project timeline during the planning phase that includes permit approvals, material lead times, and construction phases. We set realistic expectations and communicate proactively about schedule changes.
Yes. We pull all required building permits for every project that needs them. This includes preparing or coordinating structural plans, submitting applications to the local building department, scheduling inspections at each required phase, and ensuring the project passes final inspection. Permit requirements vary by city. Seattle, Bellevue, Kirkland, Renton, and other jurisdictions each have their own processes and timelines.
For specialty trades like electrical, plumbing, and HVAC, yes, we work with a trusted network of licensed subcontractors we've built relationships with over 15+ years. We vet every subcontractor for licensing, insurance, and work quality. As your general contractor, we manage all subcontractors, coordinate scheduling, and maintain quality control across every aspect of the project. You deal with one point of contact: us.
Every general contracting project we complete is backed by our 10-year workmanship warranty covering all labor and installation performed by K Single Corp and our managed subcontractors. This warranty covers defects in workmanship and installation but not normal wear and tear or homeowner modifications. Material warranties from manufacturers are separate and vary by product.
If your project involves a single trade (like a roof replacement, siding installation, or exterior painting), a specialty contractor (like us, for those specific services) is typically the right choice. When your project involves multiple trades, structural changes, permit coordination, and overall project management (like a remodel, addition, or whole-house renovation), a general contractor manages the entire process and ensures everything comes together correctly.
Get a free, detailed estimate for your general contracting project. We respond within one business day.