Riverside Custom Countertops is Riverside County's trusted expert in quartz countertops, specializing in engineered quartz slabs, Calacatta-look quartz, and undermount sink cutouts. We offer quartz waterfall islands and full-height quartz backsplashes.
Our team provides digital laser templating, delivering low-care kitchens for homes and stain-resistant work surfaces for both residential and commercial projects. With 12 years in business and our 1-year workmanship warranty standing behind every seam, we've completed over 1,870 projects, from a single quartz bar top to multi-unit kitchen packages.
From seam layout that follows the vein to clip-and-epoxy sink mounting, our team handles every detail. Serving Riverside and neighboring Eastvale, Corona and Norco, we bring each quartz kitchen in on the agreed day and leave the tops level, tight at the seams and ready to use.
Request a free estimate, and we will bring quartz samples and a laser template to your kitchen.
What you can hold us to
Priya, a 2006 tract near the Goodman Commerce Center, Eastvale
Builder-grade granite with a chipped edge at the dishwasher
Investment and duration figures are estimates. Your written quote sets the final price and schedule.
Priya lives in a 2006 tract near the Goodman Commerce Center, and her kitchen still had builder-grade granite with a chipped edge at the dishwasher. The cabinets were sound, so we recommended keeping them and replacing only the tops with warm white quartz. We templated the 40 sq ft kitchen, cut it in our shop and set it with an undermount sink, an estimated $3,100 to $4,000 job that took an estimated 1 to 2 days on site. The result is a brighter kitchen with no sealing schedule to keep up.
Tear-out, laser template, new 3cm tops, undermount sink and eased edge
Standard 40 x 80 inch island, overhang support checked
Mitered vertical panel with the vein carried down the side
Slab from countertop to the upper cabinets or hood
Granite rated for sun and heat on a block or steel BBQ island
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.
Quartz countertop installation in Riverside is estimated at roughly $65 to $145 per sq ft installed, and the brand, the pattern grade and the number of cutouts move the price most. A plain white builder quartz sits near the low end, while a marble-look pattern with long veins needs more slab to line up, which pushes most kitchens toward the top of the range.
Edges and openings add to the slab price. An undermount sink cutout with polishing and mounting is typically estimated at $75 to $125, and the old top coming off is typically estimated at $150 to $500 when we replace an existing counter. For a standard 30 to 45 sq ft Riverside kitchen, most quartz jobs land at an estimated $2,100 to $4,800 all in.
These quartz figures are estimates for Riverside and can change with slab pricing. Your written quote after the laser template sets the final price and the install schedule, and it depends on the quartz pattern you choose, the edge profile and the cutouts in your layout.
We fabricate the major engineered quartz lines, including Caesarstone, Silestone and Cambria, plus the builder-grade white quartz most property managers ask for. Engineered quartz is roughly 90 to 93 percent ground quartz bound with polyester resin and pigment, which is why it is non-porous and never needs a sealer.
Grade shows up in the pattern, not the strength. Builder grades are uniform whites and greys; designer grades carry long Calacatta-look veins that need careful slab layout so the vein does not break at a seam. Every quartz brand we set carries its maker's own warranty, typically 10 years to lifetime, on top of our 1-year workmanship warranty on seams, fit and sink mounting.
Quartz wins indoors on upkeep, while granite and porcelain win on heat and sun. The table compares the three surfaces our Riverside customers weigh most often.
| Surface | Est. installed price | Heat tolerance | Sealing |
|---|---|---|---|
| Engineered quartz | Est. $65 to $145 per sq ft | Resin can scorch near 300°F | Never |
| Granite | Est. $55 to $135 per sq ft | Handles 400°F and up | Sealed every 1 to 2 years |
| Porcelain or sintered stone | Est. $55 to $120 per sq ft | Handles 1,000°F and up | Never |
A family that cooks hard and sets pans down fast may be happier with granite, while a busy Corona or Eastvale kitchen that wants zero upkeep usually goes quartz.
The biggest quartz risk is heat: the resin binder can discolor or scorch at around 300°F, so a hot pan or a slow cooker set straight on the top can leave a permanent mark. Trivets solve it every time.
Sun is the second risk. Quartz resin can fade in direct sun, so for a patio or outdoor kitchen in Riverside's summer heat we steer customers to granite instead. The third risk sits in the shop: California adopted emergency rules on cutting engineered stone in December 2023 after silicosis cases among fabrication workers, and dry cutting quartz in a driveway is exactly what those rules target. Our shop cuts quartz wet, and our crew of 2 to 3 installers brings every top in already polished.
The same crew that templates your kitchen installs it, so nobody guesses at a measurement taken by someone else. Our owner still checks seam layouts on every marble-look quartz job before the saw starts, and every top we set carries our 1-year workmanship warranty on seams, fit and sink mounting. Meet the team behind the Riverside shop.
When quartz is not the right fit, we cut granite slab countertops for heat and outdoor use, quartzite and exotic stone for a natural look with quartz-like hardness, and solid surface tops with integrated sinks for a seamless finish.
We install quartz across a 35-mile radius of our Riverside shop, from Canyon Crest and Orangecrest to quartz kitchens in Eastvale, countertop work in Corona and Chino Hills kitchen upgrades. Norco, Woodcrest, Yorba Linda, Villa Park and Temescal Valley are on our full service area list.
Quartz kitchens often grow into a quartz waterfall island or a full-height slab backsplash, and many start as a countertop replacement over existing cabinets.
Quartz is typically estimated at $65 to $145 per sq ft installed, and your written quote sets the final price after the laser template.
No, quartz is non-porous and never needs sealing, which is the main reason Priya's Eastvale kitchen went quartz.
Use a trivet, because the resin in quartz can scorch near 300°F while granite handles far more heat.
Most kitchens take an estimated 1 to 2 days on site, typically 1 to 3 weeks after the template.
We cut Caesarstone, Silestone, Cambria and builder-grade quartz, and each carries its maker's warranty, typically 10 years to lifetime.
We do not recommend it in full sun, since quartz resin can fade, so outdoor kitchens in Norco and Woodcrest usually get granite.
Yes when they are sound and level, which is how we handled the 40 sq ft kitchen in Eastvale.
Book a free estimate, and we will laser template your kitchen, show you quartz patterns side by side and give you a written, itemized quote.
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.
