Construction in Corona — Free Estimate, One Written Price
Free on-site estimate and a written, line-item quote before any work begins. One contract, one crew, one accountable point of contact. Licensed, insured, permits handled.
Call to schedule your free estimate
At Square One Builders, we specialize in fast, reliable, and affordable construction services for homeowners and businesses.
About Us
See the Difference We Make
Our Simple 3-Step Process
Request Service or Call Us
Call us or send a quick message. Tell us your construction issue and we'll schedule a convenient time.
Inspection & Free Estimate
Our technician arrives on time, inspects the problem, and gives a clear, upfront estimate with no hidden fees.
Fast Repair on the Spot
We fix the issue quickly using high-quality parts and proven techniques — working like new before we leave.
Don't let a broken construction slow you down. Contact Square One Builders today and our experts will handle everything — from diagnosis to repair, quickly.
Call (877) 688-9930
Areas We Proudly Serve
Serving Corona, CA — Our Local Coverage Area
We're based in the Corona area and know this community well. Use the map below to see our service coverage — if you're nearby, we can almost certainly help.
What Our Customers Are Saying
"The foundation survey came back dead on. Everything downstream of that being square is the reason the rest of the build went smoothly."
"Quality construction and a professional operation. Communication was strongest at the site meetings, and slower by email in between."
"Framing crew was meticulous and the walls are straight everywhere. Drywall goes on a lot better when the framing is right."
"He was upfront about a soil issue that added cost early rather than absorbing it and surprising us at the end."
"Every inspection passed first time. The building department clearly knows him and that made the whole process easier."
"He caught an error in the engineer's drawings before it got framed, which would have been an expensive thing to discover later."
"Allowances in the contract were realistic rather than artificially low to make the bid look good."
The Smart Choice For Construction
No Change-Order Surprises
The written quote you sign is the price you pay. Anything we find mid-job gets priced and approved by you in writing before we touch it.
Licensed & Insured
Background-checked, certified technicians who meet every local requirement.
Upfront Pricing
Clear written estimates before any work begins — no hidden fees, ever.
Guaranteed Work
Every repair backed by our workmanship warranty and satisfaction guarantee.
Request Your Free Estimate
Prefer to talk now? Call us directly — we answer fast and dispatch even faster. No obligation, no sales pitch.
Call or Text(877) 688-9930





