New Roof Installation Done Right
Complete roof installations for new construction, additions, ADUs, and full re-roofs. Shingle, metal, or flat, built to Washington code and inspected at every stage.
- New Construction
- Additions & ADUs
- Shingle, Metal & Flat
- Built to Code
The short answer
Prosperity installs new roofs for homes, additions, and ADUs across King County, shingle, metal, or flat, built to code and inspected at every stage. Most homes are completed in one to three days after a free consultation and written estimate. Call (425) 588-1990.
How Your Roof Installation Works
Three steps. No surprises.
Free Consultation
We review plans or walk the existing structure, talk through material options, and measure everything. Real numbers, not ballparks.
Written Estimate
Materials, underlayment, ventilation, and flashing called out line by line. Warranty and timeline in writing.
Professional Installation
Decking, underlayment, and roofing installed to manufacturer spec and county code. Clean site every day, magnet sweep at the end.
What We Install
Architectural Shingles
The Western Washington standard. 25 to 30 year systems from GAF and CertainTeed, installed to spec.
Metal Roofing
Standing seam and panel systems for owners planning decades ahead. 40+ year lifespan, moss resistance.
Flat & Low-Slope
TPO, PVC, and torch-down for flat sections, additions, and modern designs.
Underlayment & Ice/Water Shield
The waterproofing layer nobody sees. Synthetic underlayment plus ice-and-water protection at eaves and valleys.
Ventilation Systems
Ridge and soffit ventilation balanced to the attic. Bad venting cooks shingles and breeds condensation.
Gutters & Drainage
Seamless gutters sized to the roof and installed with the roofline, so everything drains as designed.
Call us today or send us a message for a free roof inspection.
We offer financing
We’ve partnered with Wisetack to offer our customers flexible financing options, so you can pay over time rather than all at once. The application takes about a minute to complete, and checking your options does not impact your credit score.
- Finance projects up to $25,000*
- Terms from 3 to 120 months*
- APRs range from 0 to 35.9%*
- No hidden fees or compounding interest
Prequalify today with no impact to your credit and contact us to learn about financing your next project!
*All financing is subject to credit approval. Your terms may vary. Payment options through Wisetack are provided by our lending partners. For example, a $1,200 purchase could cost $104.89 a month for 12 months, based on an 8.9% APR, or $400 a month for 3 months, based on a 0% APR. Offers range from 0-35.9% APR based on creditworthiness. State interest rate caps may apply. No other financing charges or participation fees. See additional terms at https://wisetack.com/faqs. https://www.wisetack.com/faqs..
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Why King County Homeowners Choose Prosperity
5.0 Stars on Google and Facebook
Real reviews from real homeowners. No bots, no buyouts.
Licensed, Bonded, and Insured
Washington State licensure current. Workers comp and liability up to date.
Workmanship Warranty on Every Installation
Written warranty specific to the work performed. Material defects covered by manufacturer separately.
Honest Assessments
Repair when a repair works. Replacement only when it does not. No upsells.
Local Crews, Not Subcontractors
The roofers on your home are Prosperity employees who work King County every week.
Financing Available
Approved homeowners can split project costs over 12 to 60 months with no penalty for early payoff.
Industry Excellence
Our Certifications & Affiliations
Master Elite® Contractor
Frequently Asked Questions
How long does a new roof installation take?
Most single-family homes take one to three days once materials are on site. New construction and complex rooflines can run longer. The written timeline comes with the estimate.
What roofing material should I choose for a new build?
Architectural shingles are the value pick at 25 to 30 years. Metal costs more upfront and lasts 40+. Flat sections need membrane systems. We quote the options side by side so you decide with real numbers.
Do you handle permits and inspections?
Yes. We pull the permits, build to county code, and schedule the inspections. You get a roof that passes, documented.
What is included in a roof installation estimate?
Everything, line by line: tear-off or prep, decking repairs if needed, underlayment, the roofing system itself, flashing, ventilation, disposal, and warranty terms. No lump sums.
Do you charge for the consultation or estimate?
No. Both are free. You get a photo report and a written estimate whether you hire us or not.
Do you warranty new roof installations?
Yes. Written workmanship warranty plus the manufacturer's material warranty, up to 50 years on registered shingle systems.
Ready to Build It Right the First Time?
A roof installed correctly on day one means decades of not thinking about it. We will walk your project, quote it line by line, and build it to spec. Free consultation, no pressure.
Serving Western Washington — Bellevue, Renton, Kirkland, Kent, Sammamish, Redmond, Issaquah, Bothell, and surrounding communities.