Looking for a modular home builder in Rainier, WA? Describe your project once and up to three modular home builders who work in Rainier and Thurston County get back to you with a quote. It's free and there is no obligation.
Rainier is home to about 2,506 people (2024 Census Bureau estimate), a growing community (+5.9% since 2020). With 1,442 people per sq mi, it is a suburban area. Rural lots and replacements of older homes here are good fits for modular construction.
Rainier at a glance
- Population (Census Bureau estimate, 2024)
- 2,506 (+5.9% since 2020)
- Rank in Washington
- 154th of 281 cities and towns
- Land area
- 1.7 sq mi
- Population density
- 1,442 people per sq mi (suburban)
- Type
- City (Rainier city)
- Main county
- Thurston County
What to check before hiring in Rainier
- Code: in Washington, modular homes are built to the state or local building code.
- Site work: foundation, utilities, crane access and finishes must be in the quote.
- Access: delivery trucks and cranes need road and lot access.
- Price drivers: size, finishes, transport distance and site work.
Useful official resources
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Modular Home Builders Association
Official information and guidance.
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ICC: International Code Council
Official information and guidance.
Services available in Rainier
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Modular home
Factory-built modular home delivered and set on a site-built foundation, with finish work.
Frequently asked questions in Rainier
How much does a modular home cost in Rainier, WA?
It depends on size, finishes, transport and site work. Describe your project: builders who serve Rainier reply with a quote.
How long does it take?
Often a few months from order to move-in.
Can I customize the design?
Most modular builders offer customizable plans.
Which modular home builders will contact me?
Up to three independent modular home builders who serve Rainier 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.