Looking for a garage builder in Thornton, CO? Describe your project once and up to three garage builders who work in Thornton and Adams County get back to you with a quote. It's free and there is no obligation.
Thornton is home to about 146,689 people (2024 Census Bureau estimate), a growing community (+3.4% since 2020). With 4,016 people per sq mi, it is a densely built-up area. Extra storage, workshops and EVs are driving garage projects here.
Thornton at a glance
- Population (Census Bureau estimate, 2024)
- 146,689 (+3.4% since 2020)
- Rank in Colorado
- 6th of 271 cities and towns
- Land area
- 37 sq mi
- Population density
- 4,016 people per sq mi (densely built-up)
- Type
- City (Thornton city)
- Main county
- Adams County
What to check before hiring in Thornton
- Zoning: check setbacks and size limits in Thornton.
- License and permit: in Colorado, garages are built by licensed contractors under a permit.
- EV ready: add a 240-volt circuit while walls are open.
- Price drivers: size, slab, doors, finish and electrical.
Useful official resources
-
ICC: International Code Council
Official information and guidance.
-
NAHB
Official information and guidance.
Services available in Thornton
-
Detached garage
Design and construction of a detached garage with slab, permit and electrical.
-
Attached garage or garage apartment
Attached garage or garage with living space above.
Frequently asked questions in Thornton
How much does a garage cost in Thornton, CO?
It depends on size, materials and finishes. Describe your project: builders who serve Thornton reply with a quote.
How long does it take?
Often a few weeks once permits are issued.
Kit or custom?
Kits can save money; custom builds match the house.
Which garage builders will contact me?
Up to three independent garage builders who serve Thornton 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.