Kitchen islands are more than a design trend—they’re the functional centerpiece of the modern kitchen. Whether you’re remodeling your entire space or simply upgrading your island for more prep space and storage, knowing the cost to build or replace a kitchen island helps you plan smarter.
The price of a kitchen island can vary widely based on materials, size, and design features. In this guide, we break down the average costs to build, install, or replace a kitchen island, explore your material and labor options, and share how to get more value—especially if you’re using ready-to-assemble (RTA) cabinets.
Average Cost to Build a Kitchen Island
In 2026, the average cost to build a kitchen island ranges between $600 and $7,000+, depending on whether you’re choosing a prefabricated model, building from scratch, or going with a custom or semi-custom design.
Here’s a breakdown by budget tier:
- Basic / Prefab Kitchen Island: $600–$2,000
- Mid-Range (RTA Cabinets + Standard Countertop): $1,000–$3,000
- Semi-Custom Kitchen Island: $3,000–$7,000
- Custom Kitchen Island: $5,000+
The great news? RTA kitchen islands offer the sweet spot between full customization and affordability—giving you the ability to personalize your island without the fully custom price tag.
What Affects Kitchen Island Costs?
The cost of a kitchen island isn’t just about the cabinets. Several key elements impact the final price.
1. Size and Layout
A small prep island can be affordable, while a large island with seating, built-ins, or multi-level surfaces costs more.
2. Cabinet Type
- Prefabricated islands are budget-friendly but limited in style and size.
- RTA cabinets offer flexible configurations at a mid-range price for personalized or semi-custom islands.
- Custom cabinetry offers a high-end fit and finish but comes with a higher cost.
3. Countertop Material
- Laminate: Budget-friendly
- Butcher block: Warm and affordable
- Stone or quartz: More expensive but durable
4. Features and Upgrades
- Sink or cooktop installation cost depends on selection
- Outlets or under-cabinet lighting add cost that’s well worth it
- Pull-out trash bins, wine storage, or seating overhangs adds cost but makes the kitchen more functional
5. Labor and Installation
Professional installation can add $500–$1,200 or more, especially if plumbing or electrical is involved.
Cost to Install an Island in Your Kitchen
Replacing a kitchen island involves both removal and reinstallation.
- Removal of old island: $100–$300 depending on size/disposal
- Replacement with prefab/RTA island: $1,000–$3,000 on average
- Custom replacement: $4,000–$7,000+
- Extra Costs: Floor patching, matching cabinetry or finishes
RTA cabinets are ideal for replacements because they allow you to match existing cabinetry styles and save on custom work.
Comparison: RTA vs Prefab vs Custom Islands
| Type | Cost Range | Pros | Cons |
| RTA Island | $1,000–$3,000 | Affordable, customizable look | Requires assembly (can be ordered pre-assembled at RTA Cabinet Store) |
| Prefab | $600–$2,000 | Quickest install | Limited sizing and finishes |
| Custom | $3,000+ | Fully tailored to your space | Most expensive and time-heavy |
How to Save on Kitchen Island Costs
- Choose RTA cabinets: Custom look, lower price
- Stick to standard sizes and materials
- Skip plumbing/electrical to avoid extra labor
- Do it yourself (DIY) if you’re handy
- Shop sales or in-stock inventory for better deals
By choosing RTA kitchen cabinets, you can often build an island that looks high-end but stays well within budget.
FAQs: Kitchen Island Cost Questions Answered
How much does it cost to install a kitchen island with a sink?
Expect to pay $2,500–$5,000 including plumbing and a mid-range sink and faucet.
Is it cheaper to replace or build a new kitchen island?
Replacing an island is typically cheaper, especially if plumbing and electrical are already in place.
Can I install a kitchen island myself?
Yes! RTA cabinets make it easy for DIYers to build and install their own islands with basic tools.
How much do RTA kitchen islands cost?
Most fall in the $1,000–$3,000 range, depending on size, configuration, and countertop selection.
Design Your Kitchen Island for Less with RTA Cabinets
You don’t have to sacrifice style or functionality to stay within your kitchen remodeling budget. At RTA Cabinet Store, we make it easy to design a custom-style island at an affordable price. With a wide selection of cabinets, finishes, and accessories, you can create the perfect kitchen island to fit your space and your lifestyle.