Looking for an addition contractor in Clyde Hill, WA? Describe your project once and up to five addition contractors who work in Clyde Hill and King County get back to you with a quote. It's free and there is no obligation.
Clyde Hill is home to about 3,158 people (2024 Census Bureau estimate), a growing community (+1.1% since 2020). With 2,993 people per sq mi, it is a suburban area. Growing families here often add space instead of moving.
Clyde Hill at a glance
- Population (Census Bureau estimate, 2024)
- 3,158 (+1.1% since 2020)
- Rank in Washington
- 142nd of 281 cities and towns
- Land area
- 1.1 sq mi
- Population density
- 2,993 people per sq mi (suburban)
- Type
- City (Clyde Hill city)
- Main county
- King County
What to check before hiring in Clyde Hill
- Zoning: check Clyde Hill's setbacks, lot coverage and height limits first.
- License and permit: in Washington, additions are built by licensed contractors under a permit.
- Structure: second stories need an engineer to check the existing house.
- Price drivers: size, foundation, roof tie-in, plumbing and finishes.
Useful official resources
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ICC: International Code Council
Official information and guidance.
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NAHB
Official information and guidance.
Services available in Clyde Hill
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Room addition
Ground-floor addition with foundation, framing, roof and finishes.
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Second-story addition
New floor over the existing house, with structural engineering.
Frequently asked questions in Clyde Hill
How much does an addition cost in Clyde Hill, WA?
It depends on size, foundation and finishes. Describe your project: contractors who serve Clyde Hill reply with a quote.
How long does it take?
Often a few months, plus design and permits.
Does an addition raise property taxes?
Usually, since it increases the assessed value.
Which addition contractors will contact me?
Up to five independent addition contractors who serve Clyde Hill and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.