Looking for a modular home builder in St. Louis, MO? Describe your project once and up to three modular home builders who work in St. Louis and St. Louis city get back to you with a quote. It's free and there is no obligation.
St. Louis is home to about 279,695 people (2024 Census Bureau estimate), a shrinking community (−7.2% since 2020). With 4,532 people per sq mi, it is a densely built-up area. Rural lots and replacements of older homes here are good fits for modular construction.
St. Louis at a glance
- Population (Census Bureau estimate, 2024)
- 279,695 (−7.2% since 2020)
- Rank in Missouri
- 2nd of 938 cities and towns
- Land area
- 62 sq mi
- Population density
- 4,532 people per sq mi (densely built-up)
- Type
- City (St. Louis city)
- Main county
- St. Louis city
What to check before hiring in St. Louis
- Code: in Missouri, 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 St. Louis
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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 St. Louis
How much does a modular home cost in St. Louis, MO?
It depends on size, finishes, transport and site work. Describe your project: builders who serve St. Louis 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 St. Louis 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.