
Kevin, Corona business park, Corona
Tenant Improvement Countertops
- Material
- white quartz
- Size
- 3 break room counters
- Est. investment
- $3,400 to $5,600
- Est. duration
- 1 to 2 days
Office tenant improvement with three break rooms on two floors
Riverside Custom Countertops stands as Southern California's go-to pros in tenant improvement countertops, working with general contractors, property managers and facility managers on office break rooms, medical casework tops and retail transaction counters. We handle TI scopes from one 12 to 20 sq ft break room counter to multi-floor packages spread across several suites in the same building.
Our crews work in occupied office buildings, medical suites and retail centers, phasing installs around tenants and business hours so the rest of the building keeps operating. Backed by 12 years in business, we have delivered more than 1,870 projects, from a single reception top to 10-unit apartment packages, and references from contractors and property managers are available on request.
From plan takeoff and submittal review to after-hours installs and the closeout package, our team handles the parts of a tenant improvement that decide whether the tenant moves in on schedule. Serving Riverside and neighboring Norco, Corona and Eastvale, we hold the general contractor's schedule, work nights and weekends when the landlord requires it, and leave every counter ready for punch and inspection.
Request a bid with your TI drawings and move-in date, and we will price every counter in the suite from the plans.
What you can hold us to

Kevin, Corona business park, Corona
Office tenant improvement with three break rooms on two floors
Investment and duration figures are estimates. Your written quote sets the final price and schedule.
Kevin's company was finishing an office tenant improvement in the Corona business park, with 3 break room counters on two floors and a move-in date that could not slip. We installed white quartz after hours so the floors already occupied stayed open, one floor per evening, an estimated $3,400 to $5,600 job spread over an estimated 1 to 2 days of night work. All three break rooms were finished before the tenant's move-in date, and the general contractor closed the suite on schedule.
Our tenant improvement work in Riverside County ranges from a single break room counter to every stone surface in a multi-suite buildout, and these are the scopes we bid most often:

Tenant improvement demand in our area comes from real building stock: office suites downtown near the county buildings, the Hunter Industrial Park and Sycamore Canyon Industrial Park, and medical offices around Riverside Community Hospital and the Kaiser campus. In Corona we work the office and biotech suites of the business park corridor, in Eastvale the distribution offices of the Goodman Commerce Center, and in Temescal Valley the small professional suites along Interstate 15. Retail TIs at centers like the Galleria at Tyler and Riverside Plaza add cash wraps and display tops to the list.
A tenant improvement countertop job runs on the general contractor's schedule, and our part of it follows seven fixed steps.
Most tenant improvements happen in buildings where the neighboring suites stay open, so we treat quiet and clean as part of the scope. Stone arrives finished from the shop, field cuts are kept to small trims under dust extraction, and slabs ride the freight elevator on protected carts at the times building management sets. Medical buildings get an install window outside patient hours, and the work area is sealed off from occupied corridors.

Tear-out, laser template, new 3cm tops, undermount sink and eased edge
Standard 40 x 80 inch island, overhang support checked
Slab from countertop to the upper cabinets or hood
12 to 20 sq ft bar top with a bar sink cutout
Added to a replacement job; old tops removed and recycled
Investment and duration figures are estimates. Your written quote sets the final price and schedule.
Tenant improvement countertops in Riverside are priced per top or per square foot from the plans, and installed surfaces are estimated at roughly $65 to $145 per sq ft for quartz, $70 to $130 per sq ft for solid surface and $55 to $120 per sq ft for porcelain.
| Surface | Est. installed price | Where it fits in a TI |
|---|---|---|
| Engineered quartz | Est. $65 to $145 per sq ft | Break rooms and reception, never needs sealing |
| Solid surface | Est. $70 to $130 per sq ft | Medical and lab tops, integrated sinks |
| Porcelain and sintered stone | Est. $55 to $120 per sq ft | Hot coffee stations, stain resistant |
| Granite | Est. $55 to $135 per sq ft | Lobby and executive suites, sealed at install |
The count of tops, sink and grommet cutouts, edge upgrades and after-hours labor move a TI price the most, and repeated tops on several floors typically come in toward the low end of each range.
These numbers are budgetary estimates for Riverside and are subject to change; the written quote, confirmed on bid from your drawings and the field template, sets the final price and the install schedule.
General contractors choose us because one company handles takeoff, fabrication and install, so the stone schedule never depends on a broker. Our owner signs off on every shop drawing, our estimator stays the contact from bid to punch, and our installers carry the 1-year workmanship warranty on seams, fit and sink mounting on every top. After 12 years of Inland Empire work, we can send references from builders and property managers with the bid.

We bid tenant improvements across a 35-mile radius of our Riverside fabrication shop, from downtown Riverside to Corona, Eastvale and Norco. We also take TI work in Woodcrest, Temescal Valley and Chino Hills, and in Yorba Linda and Villa Park offices on the Orange County side.
Landlords and builders often pair a TI with other stone work. Our commercial countertop installation team covers ground-up retail and mixed-use projects, our restaurant and hospitality countertops crew handles bars and hotel vanities, multifamily countertop packages cover unit turnovers like the 10 apartment kitchens we turned in the University area, and builders send drawings to our fabrication service for contractors.

A single break room counter of roughly 12 to 20 sq ft is the smallest tenant improvement we bid, typically estimated at $750 to $2,400 installed.
Yes, we bid from the architect's drawings and the finish schedule, then confirm every dimension with a laser template once the casework is in place.
Most TI tops install an estimated 1 to 3 weeks after the field template, so we schedule the template the day the casework installer finishes.
Yes, night and weekend installs are standard on occupied floors, which is how the Corona office got one floor per evening.
Yes, repeated break rooms and vanities are priced per top, the same way our builder white quartz unit turnovers are priced, and volume typically lowers the per-top estimate.
Our lead installer runs every install, and our estimator remains the general contractor's single point of contact.
Our own crews template, fabricate and install every top, with only the plumbing hookup handled by the project plumber.
You get finish care sheets, the warranty letter and the quartz maker's warranty details for the building owner's file.
Contact us with your drawings, suite count and move-in date, and we will send a written, itemized proposal your general contractor can drop straight into the TI schedule.



Start to finish
We check the cabinets for level and take a digital laser template before any slab is cut.
You pick the slab and approve where every seam and vein will fall.
The stone is cut wet, edged and polished in our Riverside shop, cutouts included.
A crew of 2 to 3 installers sets the tops, mounts the sink and walks the job with you.
Where we work
Call us or send the form, and we will book a site visit and a laser template.
Calls only, we do not receive text messages.