Countertop and backsplash service costs depend on your project and location. Check with a local pro for your specific job.
Onyx countertops range from $4,000 to $7,000, and your total depends on the size and color you choose.
The color you select changes your price, with gray as the most affordable option and pink or green as the priciest choices.
You should account for removing your old countertop and disposal, which adds $150 to $300 to your budget.
Hiring a local marble and granite professional who handles fragile onyx carefully can reduce the risk of cracks during your installation.
In 2026, the national average cost for onyx countertops is $1,750. Most homeowners pay between $4,000 and $7,000, with the final price driven by countertop size, color selection, and installation complexity. You should also budget an extra $150 to $300 for old countertop removal and disposal.
Onyx countertops range from $4,000 to $7,000 for most projects, with size and color serving as the two biggest drivers of where your total lands. Costs break down by each factor below.
Countertop size is one of the primary cost drivers for onyx, with material costs ranging from $40 to $250 per square foot, depending on the slab you choose. Here's what you can expect to pay for materials based on countertop size:
| Countertop Size in Square Feet | Cost per Square Foot |
|---|---|
| 20 | $800–$5,000 |
| 30 | $1,200–$7,500 |
| 40 | $1,600–$10,000 |
| 50 | $2,000–$12,500 |
| 60 | $2,400–$15,000 |
The color you choose has a significant impact on price, with gray being the most affordable option at $35 to $120 per square foot and pink commanding the highest prices at $230 to $355 per square foot. Other available colors include green, white or off-white, and red, each falling at different points in that range depending on rarity and demand.
Your final color choice will come down to both your budget and the design direction of your kitchen or bathroom. The following table shows costs by color:
| Color | Cost per Square Foot |
|---|---|
| Gray | $35–$120 |
| Pink | $230–$355 |
| Green | $196–$250 |
| White/Off-White | $105–$190 |
| Red | $82–$126 |
Choosing among the several types of countertop edges available will affect both the look and cost of your onyx countertop, with options ranging from $10 to $40 per linear foot.
Bevel and bullnose edges are the most budget-friendly choices, with bullnose offering a fully curved profile that suits busy households and bevel providing a similar look with a cut-in slope at the corner.
Mitered and ogee edges step up in complexity, with mitered edges joining two pieces at 45-degree angles for a sharp finish and ogee edges delivering an elegant soft S curve.
Dupont edges are the most distinctive option and carry the highest price to match. Costs vary by edge style, as shown in the table below:
| Edge Design | Cost per Linear Foot |
|---|---|
| Bevel | $10–$15 |
| Bullnose | $10–$15 |
| Dupont | $20–$40 |
| Mitered | $20–$25 |
| Ogee | $20–$25 |
Where you live can meaningfully shift the cost of an onyx countertop installation, since both high-cost-of-living urban areas and remote rural locations tend to push prices up. In cities with elevated costs of living, labor and materials run higher across the board, while rural homeowners may face added shipping costs for materials and a smaller pool of pros experienced with onyx.
Labor for onyx countertop installation typically runs 10% to 20% of the project cost, and contractors may charge per project or per day, depending on how they structure their work. A general contractor costs around $300 to $500 per day, with each additional worker adding $150 to $250 per day to your total.
If you're replacing an existing countertop, budget an additional $50 to $300 to remove an existing countertop, plus $20 to $25 for proper disposal. Removal costs vary based on complexity, particularly when a contractor needs to work around plumbing or electrical lines.
Adding a sink or cooktop to your onyx countertop requires your contractor to cut openings in the stone, which costs $100 per cutout for standard shapes. More complex cutout configurations will add to that base price.
A matching onyx tile backsplash adds $10 to $50 per square foot to your total project cost and serves a practical purpose by protecting walls in your kitchen or bathroom while complementing the look of your countertops.
The cost to install onyx countertops is only part of the puzzle. Like other countertop materials, onyx has several ongoing costs to be aware of, including the following.
Because onyx is a porous stone, it must be sealed regularly to prevent damage, and sealing costs range from $100 to $1,200 depending on the sealant type and the size of the surface. Some onyx arrives pre-sealed, but most installations will require sealing upon completion and resealing every few years to maintain protection.
When your onyx countertop sustains damage, repair is often a viable alternative to full replacement, with countertop repairs costing between $210 and $540, depending on the type and extent of the damage.
Onyx is a solid stone material, so it’s heavy and difficult to install. It’s also quite fragile and susceptible to damage if handled improperly. Therefore, we recommend skipping the DIY and hiring a local marble and granite contractor to complete this project. Saving a few bucks with a DIY installation can quickly become expensive if you drop the countertop and it cracks—or if you drop it on your foot and break it.
Installing an onyx backsplash yourself while leaving the countertop installation to the pros is a good compromise. If you choose to go this route, choose small, easy-to-work-with tiles.
Installing onyx countertops can be an expensive project with a wide price range between $40 and $250 per square foot. Luckily, there are ways to save money without giving up on your dream countertops.
Shop around: Get quotes from at least three contractors before you choose who to hire for your countertop installation project.
Choose a cheaper color: Gray is often the most affordable color for onyx countertops, while pink and green are the priciest.
Look for discounts: Check several onyx countertop sellers and see whether they have any products on sale that will suit your home’s design.
Remove old countertops yourself: Doing this prep work yourself can save you between $50 and $300 on your countertop project.
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We extensively research project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We rely on reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.
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