Fence, Gates and Deck Builders in Mercer Island
Mercer Island
Custom cedar fences, gates, decks and patios built for Mercer Island’s slopes, drainage and wet Northwest climate.
Licensed, bonded, and insured.
Building since 2020
Free written estimates
What We Build in Mercer Island
From cedar privacy fences to steel-framed gates and custom decks, every project is designed for the property and built to handle Pacific Northwest weather.
FENCES
Custom cedar privacy, picket, horizontal, and good-neighbor fences.
GATES
Steel-framed cedar gates with durable hardware and locks that work from both sides.
DECKS + PATIOS
Cedar, composite, and hardwood decks, including stairs, patios, and structural framing.
CUSTOM PROJECTS
Pergolas, catios, privacy screens, retaining walls, backyard structures, and repairs.
What We Check Before We Quote
Permits and Placement
Mercer Island generally limits residential fences to 6 feet. A building permit is usually not required for a standard fence at that height, but critical areas, buffers and shoreline regulations can affect where it may be built.
Decks more than 30 inches above grade generally require a building permit. A lower deck may be exempt when it is not built over a basement or story, but its location and construction can still affect the requirements.
We check the property and project scope before work begins and include required permit work in the estimate.
Slopes and Drainage
The grade affects fence layout, deck support, stairs and how different parts of the yard connect. Drainage determines where water will move once the project is finished.
We plan both before construction so the fence follows the property, the deck sits where it should and runoff still has somewhere to go.
Access and Landscaping
We look at driveways, stairs, side-yard width and the route materials will take into the work area. We also identify landscaping, hardscape and other finished surfaces that need protection.
If materials must be carried in by hand or moved around established landscaping, that labor is accounted for in the written estimate.
How We Build
Quality outdoor construction is not only about how the finished project looks. Material selection, joinery, drainage, hardware, and below-grade conditions all influence how it performs over time.
Cedar Milled by Us
We source Western red cedar logs locally and mill each board ourselves. This gives us direct control over dimensions, quality, and finish while allowing us to produce material outside standard lumberyard specifications.
Designed for the PNW
Our post-on-pipe system anchors galvanized steel pipe below grade and positions the cedar post above the soil. Reducing contact with soil and standing moisture helps protect the base of the post, one of the most common failure points in a wood fence.
Professionally Managed
Knocking Wood is licensed, bonded, and insured in Washington. Clients receive a defined scope of work, detailed written estimate, consistent communication throughout construction, permitting coordination where required, and a labor warranty.
Contractor License #KNOCKWL804PK
What Our Clients Are Saying
Tell Us About The Project
The more you can tell us up front, the more useful the first conversation is. If you would rather just call, the number can be found below.
RATHER CALL?
HOURS
Monday to Friday
6 AM - 6 PM
Saturday–Sunday
7 AM – 5 PM
SHOP
BUYING WHOLESALE?
Lumber yards, dealers and distributors ordering Post on Pipe should use the wholesale inquiry form instead.