General Contractor Thornton, CO
Thornton’s 1970s and 80s housing stock is at the age where deferred maintenance starts compounding. Original kitchens, original bathrooms, and electrical panels that weren’t sized for modern living. Arch Design & Build is a licensed general contractor and design-build firm serving Thornton and the surrounding Adams County area
What We Build
From single-room remodels to full home renovations and additions. Every project starts with a free in-home consultation and ends with a fixed-price contract
How We Work
1
Free In-Home Consultation
We visit the property, look at the actual structure, and give you honest answers about what the project requires. No ballparks over the phone
2
Design
Full architectural drawings for your project. Once you sign a contract, we build a VR walkthrough so you see the finished result before construction starts
3
Permitting
We manage every application, engineering stamp, and inspection through the City of Thornton Building Division. Start to finish
4
Construction
Our crews. Our schedule. One fixed price. Single point of contact through final walkthrough
Licensed, Bonded, and Insured in Colorado
We carry general liability insurance — which means if something goes wrong on your property during the project, you’re covered. We provide our license number and certificate of insurance before you sign anything
Why Arch Design & Build
Most contractors build what someone else designed. You coordinate between the architect and the builder — and when something doesn't line up, it's your problem.We work differently. Architect, structural engineer, and construction team under one roof and one contract. The design is built to be constructed, not handed off. That eliminates the most common failure points in residential renovation: miscommunication, scope gaps, and budget surprises
In-house structural engineering — no third-party delays on permits
VR previews before construction starts
Daily on-site crews
One team, one contract, one fixed price
Licensed, bonded, and insured in Colorado
Where We Work in Thornton
We work throughout Thornton — Eastlake, Thorncreek, Todd Creek, and surrounding Adams County neighborhoods. Primary service zip codes: 80229 and 80233
Frequently Asked Questions
How do I verify a contractor is licensed in Colorado?
Through the Colorado Department of Regulatory Agencies (DORA). We provide our license number upfront — before you commit to anything.
What's the difference between a general contractor and a design-build firm?
A GC builds what someone else designed. A design-build firm does both under one contract. Your architect and builder are the same team — the design is always buildable and the budget is set before construction begins.
Do you work on occupied homes in Thornton?
Yes. We phase the work to keep your home livable and the job site contained throughout. That planning happens before the project starts.
How do I get an accurate quote?
We come to you. Free in-home assessment, no obligation. We look at the actual space and give you a fixed number.
The reviews speak for themselves
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Let's Talk About Your Project
Whatever you’re renovating — we’ll come out, take a look, and give you a real number.
Arch Design & Build
6312 S. Fiddlers Green Circle, Suite 300E, Greenwood Village, CO 80111