Service 04 of 11 · Phoenix, AZ
Kitchen Islands in Phoenix, AZ
An island only works if the aisle around it works. This page covers the island sizes that fit a Phoenix kitchen, the clearances that decide it, what the build costs and where the work goes wrong.
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01Islands
Do you have room for an island?
Measure the aisle before you measure the island. An island needs 42 inches of clear floor between its counter edge and the counter, wall or appliance behind it, and NKBA treats 36 inches as the minimum for a walkway, not a work aisle. If the room gives you 36 inches on one side and 42 on the other, what fits is a peninsula, not an island. Islands fail in Phoenix for one reason: the room was sized for a table, not for a work aisle. Put tape on the floor at the proposed edge and live with it for a day. A 12 by 12 foot room can hold one. An 8 by 10 foot galley usually cannot. If you have to turn sideways to reach the refrigerator, the island is too big.
02Costs
How much aisle does an island need?
The number is 42 inches for a 1 cook aisle and 48 inches for multiple cooks (NKBA (opens in a new tab)). NKBA measures the aisle between counter frontage, tall cabinets and appliances, so the width is taken from counter edge to counter edge or to the face of the appliance, not from cabinet box to cabinet box, and at the narrowest point. That is usually the open dishwasher door or the range handle. Clearance behind seating is a separate number: NKBA recommends 32 inches from the island edge to a wall where no one passes behind a seated diner, 36 inches where people edge past and 44 inches where people walk past. In a room with a wall oven across from the island, measure with the door down. A 42 inch aisle with a wall oven open is a 24 inch aisle. One 48 inch aisle and one 36 inch aisle usually beats 2 aisles of 42 inches, because the working side is where people stand.
03Islands
What size and shape island fits the room?
Island size starts from the base cabinet out, not from the top down. Base cabinets are 24 inches deep and the counter sits at 36 inches, so an island with no seating is 24 inches plus a 1 inch overhang on the back. Add 15 inches of seating overhang on the working side and the same island is about 40 inches deep. Length follows the seats: 24 inches of knee space per seat is the minimum, 30 inches is comfortable, and each end wants 6 to 9 inches of counter past the last seat. That puts a 2 seat island near 6 feet and a 4 seat island at 9 to 10 feet. Past 10 feet, one slab counter becomes a seam question, and an L shape buys a corner that is hard to reach and harder to light.
04Islands
Can an island hold a sink, a cooktop or a dishwasher?
Yes, and each function adds a trade to the job. A prep sink needs supply and drain, which in a single story Phoenix house usually means cutting the slab so the drain can reach the stack with fall. A cooktop needs a 240 volt circuit or a gas line with a shutoff in reach, plus a hood and a duct path. The duct goes up through the ceiling or turns to a wall, and the ceiling framing decides which. A dishwasher in the island needs 36 inches of clear floor in front of it and a drain connection. Plan an outlet at counter height on the island too, on its own circuit. A gas cooktop also needs the hood to vent outside, not into the cabinet below it. Get the appliance cut sheets before the cabinet order goes in.
05Islands
How deep can a seating overhang be?
NKBA recommends 15 inches deep at a 36 inch counter, 12 inches at a 42 inch bar and 18 inches at a 30 inch table height (NKBA (opens in a new tab)), each with 24 inches of width per seat. Those are the depths that let an adult sit with their knees under the top instead of leaning in. Anything past 12 inches needs support: corbels, a steel frame or legs, because a stone top cantilevered that far will crack at a seam or tip when someone leans on the end. A quartz or granite top over a 15 inch overhang usually gets a substrate and brackets. Past 18 inches it gets legs. Knee space is its own number: 24 inches wide per seat and 15 inches deep from the front edge. A stool at a 36 inch counter wants a seat 24 to 26 inches off the floor. A 42 inch bar wants 28 to 30.
067 steps
What does an island build involve, step by step?
Order of work.
Measure the room and confirm the aisle at the narrowest point.
Decide the function
prep, seating, sink, cooktop, storage, or a mix.
Draw the island to the inch and check every appliance spec.
Permit the electrical, gas or plumbing if the island carries any of them.
Build the base, set it level, and anchor it to the floor.
Run the services and get them inspected before the top goes on.
Template the counter, then install the top, the seats and the trim.
The template is where a 1 inch error in the base becomes a 1 inch error in the slab. Set the base dead level first. The counter follows the base, never the other way around.
07Costs
What does an island cost?
An island price is built from cabinets, counter, labor and whatever services it carries, so it moves with all 4. Cabinet work is nearly 30% of a kitchen budget (a national cost guide), and an island is cabinet work plus a slab plus a trade. A freestanding island with no services sits at the low end. An 8 foot island with a prep sink, a dishwasher and 3 seats sits at the high end, and the sink and the stone do most of the damage. Published ranges put a minor refresh at $10,000 to $20,000 and a major remodel at $20,000 to $65,000, which is where most island additions land when the room is being redone. Published market ranges, not a quote: the final price is set after an on-site assessment.
08Islands
What local conditions change an island in Phoenix?
3 things. The slab: a drain or a gas line in the island means cutting concrete, and some Valley slabs are post tensioned, with cables under tension that have to be located and the cut planned around them. The sun: an island under west facing glass takes the afternoon load, so a dark stone gets hot to the touch and a polished light one shows every water ring. The permit: new circuits, gas and plumbing in an island are permitted work. The City of Phoenix lists adding or moving sinks, electrical updates and gas line modifications as work that needs a permit (City of Phoenix (opens in a new tab)), and the work is inspected before the top goes on. Ceiling height counts too. At 8 feet, a hood over an island cooktop has to be low profile, and the duct still has to leave the room. Check the ceiling framing before the cabinet order.
095 steps
What goes wrong with islands?
5 things.
The aisle is measured to the cabinet box instead of the counter edge, and the room loses 2 inches it never had.
The overhang is deep enough to look right and not supported, and the stone cracks.
The island clears the wall and not the refrigerator, so the door will not open.
Outlets, a disposal switch or a hood duct get forgotten until after drywall.
The island is sized to the room width instead of the walk path, so people go around it.
All 5 can show up in the first week of use. Taping the outline on the floor, opening every appliance, and walking the path from the sink to the refrigerator with the island in place catches many of them. Aisles that feel fine on a drawing feel tight with 2 people in them.
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104 questions
Questions people ask
Still have a question? Call (747) 243-2089 and describe the kitchen.
01How wide should the aisle around an island be?
42 inches is the working number for one cook, 48 inches where 2 people share the space. Below 36 inches the island stops being usable and becomes an obstacle. Measure at the narrowest point, which is usually an open appliance door, not the cabinet face. If the room cannot give you 36 inches on both long sides, drop the island and use a peninsula.
02Can I add an island without moving the plumbing?
Yes, if the island has no sink and no dishwasher. A prep sink is what forces a drain line, and in a single story house that means cutting the slab to reach the stack. An island used for prep, seating and storage needs no plumbing at all, only an outlet. That version is the cheaper project by a wide margin.
03Is a 2 tier island better than 1 level?
Only when the sink is in it. A raised bar hides the sink from the room and gives the seats a back. On a flat island the whole top reads as one surface and the room looks larger, which matters in a 10 by 12 foot kitchen. In a bigger room with a prep sink, the 2 tier version keeps the mess out of sight.
04How many stools fit at an 8 foot island?
An 8 foot island seats 3 comfortably, at 24 to 26 inches each with 6 to 9 inches of counter past the last seat. It seats 4 only at the 24 inch minimum with no counter past the last stool, which is tight. NKBA calls for at least 24 inches of width per seat.
11Keep reading
Related
- Kitchen remodeling services: all 11 service pages in one place.
- Kitchen remodel cost in Phoenix: the full range table and what moves it.
- Kitchen layout remodels: when the island is part of a bigger plan.
- Kitchen countertops: slab choice, seams and overhang support.
- Kitchen lighting: pendants, cans and the light an island needs.
- Contact: send the room dimensions to talk through what fits.
