About Kelso Custom Builders
Building dreams into reality across the Phoenix metropolitan area for over 17 years.
Our Story
Built on Experience, Driven by Integrity
Owner Mark Kelso began his career in the trades at just seventeen years old as an electrician. Over the years, he developed a deep understanding of every aspect of residential construction — from electrical and plumbing to framing, finishing, and project management.
After decades of hands-on experience, Mark and his wife Jamie founded Kelso Custom Builders, Inc. with a simple mission: deliver exceptional custom builds with transparent pricing, clear communication, and the kind of personal attention that larger firms can't provide.
Today, with over 17 years in business and AZ ROC License #318269, we serve homeowners across the entire Phoenix metropolitan area — from Scottsdale and Paradise Valley to Cave Creek, Peoria, and beyond.
Our Values
What Sets Us Apart
Owner-Managed Projects
Mark visits every job site daily. You'll never be handed off to a project manager you've never met — you work directly with the owner.
Design & Build
We handle every step — design, 3D renderings, permitting, and construction. One team, one vision, zero miscommunication.
Permitting Expertise
We're intimately familiar with Maricopa County zoning requirements. Every design we offer is guaranteed to be buildable.
No Hidden Costs
Transparent pricing from the first estimate. Clear communication and honest numbers you can plan around — no surprises.
Client Testimonials
What Our Clients Say
"Great communication, great guy, gets job done in very very timely fashion."
"Very responsive and thorough. Patiently educates homeowner. Creative suggestions."
"Great guy, very easy to work with and understands what you are trying to accomplish."