Window & Door Replacement
Energy-efficient replacement windows, entry doors, and patio doors, sealed and flashed so they keep Northwest rain out and the heat in.
Get Your Free Window & Door Estimate
Tell us about your project. We'll call to confirm a time that works for you.
- Free in-home estimateWritten quote, no pressure
- Energy code windowsMeet Washington’s energy code
- Financing available$0 down on approved credit
- Licensed & insuredWA Lic. #DAWNCCW747K2
- Rated 4.9 on GoogleBy local homeowners
- Prefer to talk?Call (206) 672-1711
What's Included in a Window or Door Project
Window & Door Replacement in Seattle & the Puget Sound
Dawn Construction is a licensed Washington contractor that replaces windows and doors in 45 cities across Greater Seattle and the Puget Sound. We install energy-efficient windows that meet Washington’s energy code, seal and flash every opening against our rain, and back every project with a one-year workmanship warranty.
Signs It’s Time to Replace Windows or Doors
- Drafts and cold spots: air leaking around frames and sashes.
- Fog between the panes: the seal on double-pane glass has failed.
- Condensation and water stains: moisture on sills or stains on the wall below.
- Soft or rotted frames: wood frames and sills that have taken on water.
- Hard to open or lock: windows that stick and doors that won’t latch.
- Single-pane glass: old windows that let heat pour out.
Energy-Efficient Windows in Washington
Windows are rated by their U-factor: how much heat passes through the whole window, frame and glass included. The lower the number, the less heat escapes. You’ll find it on the NFRC label on every new window.
Washington’s energy code sets a maximum U-factor of 0.30 for new and replacement windows in homes, or an average of 0.30 when several windows are installed together. For comparison, the worst single-pane windows rate as high as 1.30.
| Window | Typical U-Factor | What It Means |
|---|---|---|
| Old single-pane | Up to 1.30 | Lets the most heat escape |
| Washington code maximum | 0.30 | The limit for new and replacement windows in homes |
| Most advanced glazing | As low as 0.15 | The best performance available |
Window Styles Compared
| Style | How It Opens | Best For |
|---|---|---|
| Double-hung | Both sashes slide up and down | Traditional homes; easy to clean |
| Single-hung | The bottom sash slides up | A simple, budget-friendly option |
| Casement | Swings out with a crank | Tight seal and good airflow; hard-to-reach spots |
| Sliding | Slides side to side | Wide openings and modern homes |
| Picture | Doesn’t open | Views and light |
| Awning | Hinged at the top, opens outward | Ventilation during light rain |
Door Options
| Door | What It’s For | What to Know |
|---|---|---|
| Entry door | Front and side entrances | Weatherstripping and a sealed threshold keep rain and drafts out |
| Sliding patio door | Deck and patio access | Saves space; large glass panels need safety glass |
| French doors | Patios and between rooms | A wide, classic opening |
| Interior doors | Bedrooms, baths, closets | A quick upgrade when paired with new trim and paint |
Adding a patio door to a new deck? See our decks and patios services.
Windows and Doors Installed for Northwest Rain
Most window and door leaks come from the installation, not the product. In our long rainy season, the details around the opening decide whether water stays out.
| Detail | What We Do | Why It Matters |
|---|---|---|
| Opening inspection | Check the sill and framing for rot before installing | A new window in a rotted opening will leak |
| Flashing | Seal the opening into the wall’s water barrier | Directs water out instead of into the wall |
| Sealing and insulation | Insulate and seal the gap around the frame | Stops drafts and condensation |
| Door thresholds | Level, sealed thresholds with proper weatherstripping | Keeps wind-driven rain out at the bottom |
Replacing siding too? It’s the best time to replace windows, so both are flashed together. See our siding services.
Permits & Safety Rules
Rules vary by city, but these apply widely in Washington homes. Even when no permit is needed, the code requirements still apply.
| Rule | When It Applies | What It Means |
|---|---|---|
| Same-opening replacement | New window in the same opening, no structural changes | Often no building permit |
| New or wider openings | Adding a window, or a wider window that needs a bigger header | A building permit |
| Energy code | All new and replacement windows | U-factor of 0.30 or lower, or 0.30 averaged |
| Emergency escape | Bedrooms and basements without an escape window | The new window should meet escape requirements where feasible |
| Safety glass | Glass in hazardous locations, such as in or next to doors | Safety glazing required |
Our Installation Process
Step 1: Free In-Home Estimate
We measure every opening, check frames for rot, and send a written quote.
Step 2: Product Selection
You choose styles, frames, and glass; we confirm energy ratings and any safety glass.
Step 3: Ordering & Permits
Windows and doors are ordered to size; we handle any permit.
Step 4: Removal & Repair
Old units come out; damaged sills and framing are repaired.
Step 5: Installation
New units set level, flashed, insulated, and sealed.
Step 6: Trim, Cleanup & Walkthrough
Trim and caulk finished, old units hauled away, and every window and door checked with you.
Window & Door Cost – What to Expect
Every project is priced individually. You get a written quote after a free in-home estimate, before any work begins.
| Price Factor | Effect on Cost | Why It Matters |
|---|---|---|
| Number and size | More and larger units mean more material and labor | Measured at the estimate |
| Style and frame | Casement and custom shapes usually cost more than sliders | Frame material changes upkeep too |
| Glass | Higher-performance and safety glass add cost | Lower U-factor means lower heating loss |
| Opening repairs | Rotted sills or framing must be fixed | Found once the old unit is out |
| Resizing | Wider openings need new headers and a permit | Structural work adds scope |
Want to spread the cost? See our financing options.
What Makes Our Window & Door Work Different
- Licensed and verifiable: WA Lic. #DAWNCCW747K2. You can check any contractor on L&I’s Verify tool.
- Code-compliant products: windows that meet Washington’s energy code and safety glass rules.
- Flashed for our rain: every opening sealed into the wall’s water barrier.
- Repairs in-house: rotted sills, framing, siding, and trim fixed by the same team.
- Clear pricing: a written quote after a free in-home estimate.
- One-year workmanship warranty: plus manufacturer warranties on products.
Ready for New Windows or Doors?
Get a free in-home estimate and a written quote. No pressure, no obligation.
FAQ – Windows & Doors
How much does window or door replacement cost?
It depends on how many windows or doors you replace, their size and style, the frame material, and whether the openings need repair or resizing. Every project gets a written quote after a free in-home estimate, and financing is available.
Do I need a permit to replace windows in Washington?
Often not, if the new window goes into the same opening with no structural changes. A permit is usually needed when you add a new window or make an opening wider, which can require a bigger header. Rules vary by city, so we check yours.
What energy rating do new windows need in Washington?
Washington’s energy code limits new and replacement windows in homes to a U-factor of 0.30 or lower, or an average of 0.30 across several windows. A lower U-factor means less heat escapes.
What is a U-factor?
It measures how much heat passes through the whole window, including the frame and glass. Lower is better. It’s printed on the NFRC label on new windows; old single-pane windows can be as high as 1.30.
Do bedroom windows have special rules?
Yes. Bedrooms and basements need an emergency escape opening. When you replace a window in a bedroom that doesn’t already have one, the new window should meet escape requirements where feasible.
Do doors and windows near doors need special glass?
Glass in hazardous locations, such as in or next to doors and near tubs or showers, must be safety glazing. We choose glass that meets those rules.
Should I replace windows when I replace my siding?
It’s often the best time. With the siding off, new windows can be flashed and sealed into the water barrier properly, which is harder to do later.
Which areas do you serve for windows and doors?
Dawn Construction replaces windows and doors in 45 cities across King, Snohomish, Pierce, Kitsap, Thurston, Island, Skagit, Whatcom, and Mason counties, from Bellingham to Olympia.
Do you offer free estimates and financing?
Yes. Every project starts with a free in-home estimate and a written quote, and financing is available.
Other Services We Provide
Windows & Doors Across 9 Western Washington Counties
From our offices in Renton and Mukilteo, we replace windows and doors in 45 cities, from Bellingham to Olympia. See the full service area.
King County
- Renton
- Seattle
- Bellevue
- Kent
- Federal Way
- Redmond
- Issaquah
- Bothell
- Kirkland
- Sammamish
- Mercer Island
- Newcastle
- Auburn
- Tukwila
- SeaTac
- Burien
- Shoreline
- Kenmore
- Covington
- Maple Valley
Snohomish County
- Mukilteo
- Everett
- Lynnwood
- Marysville
- Arlington
- Monroe
- Snohomish
Pierce County
- Tacoma
- Puyallup
- Lakewood
- Gig Harbor
- Eatonville
Kitsap County
- Bremerton
- Silverdale
- Poulsbo
- Kingston
Thurston County
- Olympia
- Yelm
Island County
- Oak Harbor
- Coupeville
Skagit County
- Mount Vernon
- Burlington
- Sedro-Woolley
Whatcom County
- Bellingham
Mason County
- Shelton
Don't see your city? Contact us or call (206) 672-1711.
Sources
- City of Kirkland, Window Installation and Replacement
- Seattle SDCI, Tip 403, NFRC Labeling Requirements
Why Dawn Construction
Licensed & Insured
Fully credentialed for your peace of mind and protection on every project.
Full Team, Real People
Call Sunday–Friday, 8am–10pm and a real person from our team will answer.
Transparent Pricing
No hidden fees or surprise costs. We respect your budget.
Start Your Window & Door Project
Ready to transform your living space? Reach out for a free, no-obligation estimate.
Ready to Get Started?
Call or email us directly — we're available Sunday–Friday, 8am–10pm and respond fast.
Call (206) 672-1711