Shed building services
Storage, garden, workshop, and office builds — plus foundations and repairs.
OpenFree shed estimate in Seattle A shed that's still standing straight in twenty years
Site-built storage sheds, garden buildings, workshops, and insulated backyard offices across Greater Seattle — on real foundations, with real roof details, sized and sited to your setbacks.
- Free on-site estimate — we check your setbacks before we design
- Storage sheds up to 120 sq ft often need no construction permit
- Gravel pad, pier, or slab foundations — not pavers on dirt
- Insulated, wired, and heated backyard offices available
- Roof, siding, and trim matched to your house
WA licensed & insured Setbacks verified with SDCI Written line-item estimates
Get your free shed estimate
Leave your name and how to reach you. We'll call to hear about the project and schedule a site visit — usually within one business day.
- Storage / garden shed
- 1–2 wks
- Insulated office build
- 3–5 wks
- Permit-exempt storage shed
- ≤120 sq ft
- Cost for the estimate
- $0
Why us
What you get when you hire us
- A foundation, not a guess
- Gravel pads with pressure-treated skids, concrete piers, or a slab — sized for the structure, the soil, and the slope. Almost every rotted shed we're asked to replace was set straight on dirt or a few patio pavers, and that's the whole story.
- The permit question, answered first
- Seattle skips the construction permit only for single-story storage sheds with a roof area of 120 square feet or less. Bigger sheds and backyard offices need one, and zoning applies either way, so we confirm the permit path, setbacks, and lot coverage for your address before we design anything.
- A roof that actually sheds water
- Real roofing assembly, proper underlayment, drip edge, and enough overhang to keep rain off the walls. Add ventilation and what's stored inside stays dry instead of growing mold through a Seattle winter.
- Backyard offices that work in February
- Insulated floor, walls, and roof, permitted power from the house, and a ductless mini-split. An uninsulated shed with an extension cord run to it is a summer room — everyone who tries that is back at the dining table by November.
- It should look like it belongs
- Matching the roof pitch, siding profile, trim, and paint to your house makes the shed read as part of the property rather than an object parked in the yard. Small decision, outsized effect on the finished yard and on resale.
- Straight answers about DADUs
- If you want to sleep, cook, or rent it out, you need a DADU, not a shed — different permit path, different budget. We build both and we'll tell you which one your actual goal requires before you spend anything.
5 out of 5 stars
We'd priced out a prefab kit and a full DADU and neither one was right — one was junk and the other was a mortgage. Marco walked the yard, measured the setbacks, and showed us we could get a real insulated office at 190 square feet. Four weeks later I have a heated room with a window wall and my dining table back. It's the best money we've spent on this house.
Dana R.
Magnolia
Recent work
Sheds and backyard structures
Cedar siding, real roof assemblies, pier foundations, and finished, heated interiors.
Our Process
Consultation & Site Visit
We review your goals, space, and budget and answer initial questions.
Estimate & Scope Review
You receive a clear, written estimate with defined scope and expectations.
Build Phase
We coordinate trades, manage permits if required, and keep the site clean and organized.
Final Walkthrough
We review details with you and make sure everything is completed properly.
Frequently asked questions
Can't find the answer you're looking for? Give us a call.
- Is the estimate really free?
- Yes. We come out, look at the site and the slope, confirm your setbacks, talk through foundation and size options, and send a written line-item estimate at no charge and with no obligation.
- Will I need a permit?
- For a small storage shed, often not. Seattle doesn't require a construction permit for a detached, single-story shed with a roof area of 120 square feet or less that's used only for storage or gardening. Larger sheds and backyard offices need one. Zoning applies either way — setbacks, rear-yard coverage, and lot coverage — and power needs its own electrical permit. We confirm the current rules with SDCI for your address first.
- Can the shed have power, heat, and internet?
- Yes. We run a permitted circuit from the main panel, add outlets and lighting, install a mini-split or wall heater, and pull data or set up a mesh point. That's what makes the difference between a summer room and a room you use all year.
- What affects the cost of a custom shed?
- Size, foundation, and how finished the inside is. A gravel pad costs less than concrete piers or a slab, and a sloped site adds work. An insulated, wired, and heated backyard office costs considerably more than a storage shed with the same footprint, and it needs a permit. The line-item estimate breaks those out so you can see what each choice adds.
- Why not just buy a prefab kit?
- For plain low-cost storage a kit can be the right call, and we'll say so. The trade-offs are thin sheathing, stapled roofing, no real foundation, and no flashing where the roof meets the walls — which in this climate usually means visible rot in well under a decade.
- What areas do you serve?
- Greater Seattle and King County — Ballard, Fremont, Greenwood, Magnolia, Queen Anne, Capitol Hill, West Seattle and the rest of the city, plus Bellevue, Kirkland, Redmond, Renton, Shoreline, Edmonds and surrounding areas.
Service Areas
Serving the Greater Seattle Area
From Snohomish County to Federal Way, if you need help call Saddle & Spur Construction today.
- Seattle
- Ballard
- Fremont
- Greenwood
- Phinney Ridge
- Wallingford
- Queen Anne
- Magnolia
- Capitol Hill
- Eastlake
- Ravenna
- Madison Park
- West Seattle
- Beacon Hill
- Columbia City
- Rainier Valley
- Northgate
- Shoreline
- Lake Forest Park
- Kenmore
- Bothell
- Mountlake Terrace
- Bellevue
- Kirkland
- Redmond
- Sammamish
- Issaquah
- Mercer Island
- Newcastle
- Renton
- Kent
- Tukwila
- Burien
- SeaTac
- Des Moines
- Federal Way
- Covington
- Maple Valley
- Auburn
- Lynnwood
- Edmonds
- Mukilteo
- Mill Creek
- Everett
- Marysville
- Lake Stevens
- Monroe
Want more detail before you call?
The service page covers foundations, permits, and backyard offices in depth. The portfolio shows finished work with timelines.
Shed portfolio
Finished sheds and backyard structures with details.
OpenMagnolia shed studio
A 190 sq ft insulated backyard office with cedar siding and a window wall.
OpenADU construction
If you need a kitchen, bathroom, or rental, a DADU is the right path.
OpenLet's talk about your shed
Tell us what's going inside and roughly where you'd put it. We'll walk the site, check the setbacks, and price it out in writing.