Looking for an addition contractor in Pasco, WA? Describe your project once and up to three addition contractors who work in Pasco and Franklin County get back to you with a quote. It's free and there is no obligation.
Pasco is home to about 81,724 people (2024 Census Bureau estimate), a growing community (+5.7% since 2020). With 2,097 people per sq mi, it is a suburban area. Growing families here often add space instead of moving.
Pasco at a glance
- Population (Census Bureau estimate, 2024)
- 81,724 (+5.7% since 2020)
- Rank in Washington
- 17th of 281 cities and towns
- Land area
- 39 sq mi
- Population density
- 2,097 people per sq mi (suburban)
- Type
- City (Pasco city)
- Main county
- Franklin County
What to check before hiring in Pasco
- Zoning: check Pasco'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 Pasco
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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 Pasco
How much does an addition cost in Pasco, WA?
It depends on size, foundation and finishes. Describe your project: contractors who serve Pasco 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 three independent addition contractors who serve Pasco 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.