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Prefab Granite Depot installs custom kitchen countertops for homes across San Diego County. Whether you live in a coastal La Jolla home or a family house in Poway, we focus our entire business solely on kitchen remodeling. This strict focus allows our team to provide highly accurate measurements, precise stone cutting, and reliable installation for your Southern California cooking space. We supply and install five specific types of surfaces: Quartzite, Granite, Porcelain, Prefabricated, and Marble countertops.
Our Kitchen Countertop Materials
We source heavy solid stone materials and fabricate them to fit the exact dimensions of your kitchen cabinets. Read about our specific material options below to decide which surface fits your cooking habits and your San Diego lifestyle.

Nature creates quartzite when sandstone undergoes extreme heat and pressure beneath the earth. This natural process changes the stone into a very dense and hard material. Quartzite countertops score high on the hardness scale. They resist scratches from knives and heavy pots during your weekly meal prep. You get a visual style very similar to marble but with strength that stands up to heavy daily cooking. Because quartzite remains a porous natural stone, you need to apply a penetrating stone sealer once a year to prevent dark stains from liquids like olive oil or wine.
Granite is an igneous rock that forms from cooling magma. San Diego homeowners consistently choose granite countertops for their exceptional durability and high heat resistance. You can place hot baking sheets directly on the surface without cracking the stone. We carry a massive inventory of raw granite slabs featuring speckled, veined, and solid patterns. Granite is highly porous. You must commit to sealing your granite countertops regularly to keep liquids from seeping into the stone and harboring bacteria.


Manufacturers create porcelain countertops by baking dense natural clay and mineral mixtures at extreme temperatures. This modern manufacturing process produces a completely non-porous surface. Porcelain countertops resist stains, deep scratches, and ultraviolet light. You can install porcelain in your indoor kitchen or your outdoor Mission Valley barbecue area without worrying about the bright California sun fading the colors. You do not ever need to seal porcelain. It provides a highly sanitary surface for preparing raw food.
Suppliers cut prefabricated countertops to standard kitchen dimensions before shipping them to our local San Diego fabrication shop. These pieces arrive with one edge already polished and finished. We then take these pre-cut pieces and trim them down to fit your specific kitchen cabinets and sink layout. This option significantly reduces material waste. It saves you money and speeds up the entire installation timeline. You can choose prefabricated countertops in several different natural and engineered stone types.Â


Marble forms from limestone and primarily consists of calcium carbonate. This composition gives marble its traditional style and famous white or gray veining. Serious bakers often prefer marble countertops because the stone stays naturally cool to the touch. This cool surface helps immensely when you roll out pastry dough on warm summer days. However, marble has a much softer surface than granite or quartzite. Acidic liquids like lemon juice, tomato sauce, and coffee will chemically react with the calcium carbonate. This reaction causes dull spots called etching. You must wipe up spills immediately and adhere to a strict sealing schedule to protect marble surfaces.Â
We follow a highly structured four-step process to make sure your new countertops fit your kitchen layout safely and accurately.
• Material Selection and Estimate: You visit our local showroom to view our stone inventory. You select your exact slabs. You provide us with basic measurements of your kitchen, and we give you a clear itemized price estimate.
• In-Home Digital Templating: Once you secure your base cabinets to the wall, our technicians visit your home. We use laser measuring tools to create a digital map of your cabinets, sink locations, and stove cutouts. We use this digital map to plan highly precise cuts.
• Custom Fabrication: We transport your chosen slabs to our local cutting facility. Our team uses waterjet technology and computer-guided saws to cut the stone. We shape the edges, polish the surfaces, and prepare the exact cutouts for your specific sink and cooktop appliances.
• Delivery and Installation: Our heavy-lifting crew delivers the finished stone pieces to your home. We carefully set the stone onto your cabinets. We level the pieces, secure them with professional adhesives, and fill any necessary seams with color-matched epoxy. We clean the stone and the surrounding work area before we drive away.

Get answers to common queries about our Solid Wood Cabinets in San Diego, ensuring you make informed decisions for your kitchen upgrade.
No. We specialize strictly in kitchen remodeling and kitchen countertop installation. By focusing exclusively on kitchens, our fabrication and installation teams maintain a high level of expertise in dealing with large kitchen islands, heavy kitchen sinks, and complex cooktop cutouts. We do not install bathroom vanities, shower walls, or fireplace surrounds.
The overall timeline from the day we measure your cabinets to the day we install the stone usually takes between one to two weeks. The actual installation day goes very quickly. Our crew arrives in the morning and generally finishes installing, seaming, and cleaning your new countertops within four to six hours.
Custom slabs arrive as massive uncut pieces of stone. We use custom slabs when you have a very large or uniquely shaped kitchen island that requires a continuous piece of stone without seams. Prefabricated countertops arrive pre-cut to standard rectangular sizes with pre-finished front edges. We use prefabricated pieces for standard straight cabinet runs. Prefabricated pieces cost less because they require less labor in our cutting shop.
Granite and porcelain offer the highest level of heat resistance among all our materials. You can confidently set hot roasting pans or boiling water pots directly on these surfaces without causing thermal shock or burn marks. While quartzite also handles heat well, we still recommend using trivets to protect the chemical sealer sitting on top of the stone.
Yes. If you choose to include demolition in your project scope, our team will safely remove your existing countertops. We carefully detach the old material to avoid damaging your existing cabinets. We load the old materials into our trucks and handle all the disposal fees at the local waste facility.
You should clean daily sand or food messes using a soft cloth, warm water, and a few drops of mild dish soap. You must actively avoid harsh chemical cleaners, bleach, ammonia, and acidic products like vinegar. These harsh chemicals break down the protective sealer and eat into the actual stone over time. You should dry the surface with a microfiber towel to prevent water spots.
Yes. We apply an initial heavy layer of professional stone sealer to all porous materials like granite, marble, and quartzite immediately after we finish the installation. This gives you immediate protection against liquids. We will instruct you on how to test your stone with water drops to know exactly when you need to reapply sealer in the future.
Marble etches because it contains high amounts of calcium. When an acidic liquid touches calcium, a chemical reaction occurs instantly. This reaction dissolves a microscopic layer of the stone and leaves a dull chalky mark. You prevent etching by using cutting boards for all food preparation, placing coasters under all drinks, and wiping up any spills the exact second they happen.
Standard structurally sound base cabinets easily support the weight of granite, quartzite, or porcelain countertops. However, if your cabinets show signs of water damage, rotting wood, or loose joints, you must repair them before we install the heavy stone. Our templating technician will inspect your cabinets during the measuring appointment to ensure they can hold the weight.
We cannot make seams completely invisible, but we do make them very hard to notice. When your kitchen layout requires two pieces of stone to meet, we use a specialized machine to pull the two pieces tightly together. We then mix a strong epoxy resin and tint it to match the exact background color of your specific stone. We fill the joint and shave it flat so the surface feels entirely smooth to the touch.
Schedule a consultation today and let us bring your vision to life. Contact Us to get started.
Prefab Granite Depot is servicing all San Diego
$1,500 Kitchen Hardware Credit