An island is the most requested feature in the DMV kitchens we remodel. It adds prep space, storage, and a place to sit — and in an open-concept layout it becomes the center of the house. It can also be a surprisingly wide price range, because “add an island” can mean anything from a cabinet run with a top on it to a second sink with a dishwasher. The island above — espresso cabinets, a white quartz top and an undermount sink — is from a recent project.
2026 KITCHEN ISLAND COSTS
| Island Type | Typical DMV Range (Installed) |
|---|---|
| Basic island, stock cabinets, outlets only | $4,000 – $8,000 |
| Semi-custom with seating overhang | $7,000 – $14,000 |
| Island with prep sink or main sink | $11,000 – $20,000 |
| Island with sink, dishwasher & cooktop or range | $18,000 – $30,000+ |
The ranges assume flooring under the island is already in place or being replaced as part of a larger project. Patching existing flooring around a new island footprint is one of the hidden costs to plan for.
WHERE THE MONEY GOES
Countertop
Islands are big slabs. A 4×8-foot island top is 32 square feet before overhang — at $70–$150 per square foot installed for quartz or granite, the top alone can run $2,500–$5,000. Larger islands may need a seam; ask where it will fall before you approve the template. Our quartz vs. granite guide helps with the material choice.
Electrical
Code requires receptacles at an island. On a slab or over a finished ceiling, getting power to the middle of the room means opening the floor or ceiling below — often $500–$1,500 handled by a licensed electrician.
Plumbing
A sink in the island needs supply lines, a drain, and a vent. Islands can't use a standard wall vent, so plumbers use an island loop vent or an air admittance valve where local code allows. This is the single biggest jump in island cost.
Seating
A 12" overhang works for counter stools; 15" is more comfortable. Overhangs beyond about 10–12" need steel brackets or corbels to support stone.
DOES AN ISLAND FIT?
- Aisles: 42" minimum between the island and surrounding counters for one cook; 48" for two cooks or if an appliance door opens into the aisle.
- Behind seating: 36" behind stools if nobody walks behind; 44–60" if it's a walkway.
- Minimum size: an island under about 2×4 feet tends to feel like an obstacle. If the room can't fit that plus clearances, a peninsula usually works better.
Tape the island footprint on the floor and live with it for a weekend. Open the dishwasher and the oven. Walk through with groceries. It's the cheapest design review you'll ever do.
ISLAND VS. PENINSULA
In many older DMV colonials and split-levels, the kitchen is narrower than an island needs. A peninsula — attached to the existing counter run on one end — gives most of the benefits (seating, prep space, storage) in less floor area, and plumbing and power are easier to reach. If you're considering taking out a wall to make room, see our open concept remodel guide first.
RELATED READING
KITCHEN REMODEL COST GUIDE FOR THE DMV (2026)
What a kitchen remodel actually costs in DC, Maryland, and Virginia -- broken down by scope, materials, and timeline.
QUARTZ VS. GRANITE FOR A BUSY KITCHEN
Heat, stains, sealing, seams and cost — the real differences for family kitchens.
OPEN CONCEPT REMODEL GUIDE FOR DMV HOMES
Load-bearing vs. non-load-bearing walls, real costs, permit requirements, and what else changes when you open up a floor plan.
Planning a project? See our Kitchen Remodeling service page for scope, process and recent work.
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