Keystone is a commercial general contractor for ground-up builds, tenant fit-outs, and structural renovation. Forty-one years, 600+ projects, and a schedule we put in writing — because the date on the contract is the only date that matters.
Four decades. One standard. The proof is in the numbers.
From 14-story towers to surgical suites running on live power. Every project below was self-managed by a Keystone superintendent from groundbreaking to closeout.
412,000 sq ft Class-A office core-and-shell on a tight downtown lot. Topped out three weeks early using a self-perform concrete crew running a four-day floor cycle. Delivered $1.4M under GMP.
A new surgical wing built against a hospital running 24/7. Phased to keep four operating rooms live, with infection-control barriers and zero unplanned shutdowns across an 18-month build.
A 1920s iron foundry converted to ground-floor retail over four floors of loft offices. We saved the original steel trusses, retrofit the structure to current seismic code, and kept the brick.
A half-million-square-foot distribution hub with 64 dock doors, poured and tilted in 11 weeks. Site-cast 41-foot wall panels and a super-flat slab certified for high-bay racking.
A three-floor headquarters fit-out delivered in a turned-over shell. Custom millwork, raised access flooring, and a full AV-integrated boardroom — move-in ready in 16 weeks, on the dot.
A regional bus and rail interchange built over a working transit corridor. Night-shift steel erection, prevailing-wage labor, and a public-art canopy delivered to a hard municipal deadline.
Schedule and quality live in the structure. So Keystone keeps concrete, steel, and supervision in-house — and manages the rest of the trades like our name is on every one of them.
Our own union crews self-perform cast-in-place concrete, tilt-up panels, and slab work. When the structure is on our payroll, the floor cycle is on our schedule — not a sub's.
Real estimates from real drawings. We pull a guaranteed maximum price together with you before the first shovel, then defend it through value engineering and tight buyout.
In-house erection crews and a detailing partner mean structural steel goes up on our cadence, with bolt-up and decking sequenced to keep the trades behind us moving.
Every project gets a dedicated superintendent on site daily — not a roaming PM. One person owns the schedule, the safety, and the punch list from day one to closeout.
A live four-week look-ahead, weekly trade coordination, and a critical path we share openly. You always know what's next, what's at risk, and what we're doing about it.
We finish the punch list before we leave, hand over a complete O&M package, and stand behind the work with a two-year workmanship warranty and a real phone number.
A safe site is a productive site. Keystone runs a zero-incident program because the fastest way to lose a deadline is to lose a crew. Our 0.61 EMR is below the industry average for a reason.
Our experience modification rate sits well under 1.0 — a record built on training, not luck. Lower risk on site means lower cost and fewer delays for you.
Every Keystone foreman and superintendent carries an active OSHA 30 card, with daily toolbox talks and a site-specific safety plan before mobilization.
Our superintendents document the site every morning with photos and a hazard log. Problems get caught at framing, not at inspection.
Full surety bonding capacity and $90M in coverage, so owners and lenders sleep easy. We carry the risk so the project doesn't.
“Keystone topped out three weeks early and came in under the GMP. After two bad experiences with other GCs, I finally had a builder who treated my schedule like their own money.”
“They built a surgical wing onto a hospital that never closed. Eighteen months, four live operating rooms next door, and not one unplanned shutdown. That's not luck — that's planning.”
“Same superintendent on site every single day, from groundbreaking to keys. When I called, I got the person who actually knew the answer. That alone is worth hiring Keystone.”
Send us your plans or just the napkin sketch. You'll get a senior estimator on a call within two business days and a real preconstruction number — not a salesperson and a brochure.