An island is the feature most people ask for when they open up an HDB kitchen, and the one most often squeezed into a space that cannot take it. The test is simple: if two people cannot pass each other comfortably between the island and the counter, the island is making the kitchen worse, not better.
In Singapore, the decision also depends on the flat. You need HDB approval to remove a kitchen wall, and only non-structural walls can go. Gas pipes, the gas riser, sanitary stacks and floor slabs limit where a hob or sink can move. A full island with a hob needs gas or power in the middle of the room and a hood above it, which is rarely practical in an HDB flat.
This page compares every island type a Singapore homeowner realistically considers, from a full island to a peninsula, a dining extension and a mobile trolley, with the clearances to plan for and the rules that decide what is possible.
Kitchen islands options at a glance
| Option | Cost | Durability | Upkeep | Best for |
|---|---|---|---|---|
| Full freestanding island (prep and storage) | Upper | excellent | low | Large condo, landed and combined-space HDB kitchens |
| Peninsula | Mid-range | excellent | low | Open-concept BTO and resale HDB kitchens |
| Island with hob | Premium | excellent | medium | Large condo and landed kitchens with light cooking |
| Island with sink | Premium | excellent | medium | Condo and landed kitchens with a clear route for waste pipes |
| Island with dining extension | Upper | excellent | low | Couples and small families who eat most meals in the kitchen |
| Slim island or bar counter | Mid-range | good | low | Smaller HDB flats and galley-style kitchens opened to the living room |
| Mobile island or kitchen trolley | Budget | moderate | low | Small kitchens, rentals and owners who are unsure about a fixed island |
| Two-level island (prep plus raised ledge) | Upper | excellent | low | Open kitchens where you want to hide the mess |
Cost is relative within kitchen islands ($ budget to $$$$ premium). Actual prices depend on brand, size and workmanship, so compare itemised quotes.
Full freestanding island (prep and storage)
- Upper Upper
- Durability: excellent
- Upkeep: low
A standalone block of cabinets with a countertop, accessible from all sides, used for prep, storage and serving. The classic island, but it needs the most floor space.
Best for: Large condo, landed and combined-space HDB kitchens
Pros
- Extra counter and storage on all sides
- Creates a social hub between kitchen and living area
- No plumbing or gas needed, so fewer rules apply
- Can include drawers, a wine rack or appliance housing
Cons
- Needs walkways on all four sides
- Often too big for a standard HDB kitchen
- Collects clutter if there is no clear purpose
- Power points in the island need floor or ceiling routing
NKBA planning guidelines (from the US National Kitchen and Bath Association) recommend work aisles of at least 42 inches (about 1,070mm) for one cook and 48 inches (about 1,220mm) for more than one cook, and walkways of at least 36 inches (about 915mm). Applied to an island, that means roughly 1 metre or more on every working side.
SmartCalculator estimates a kitchen island or peninsula at about $1,500 to $4,000 per unit (2026, indicative), before any premium countertop.
If you want power points in the island for a kettle or mixer, plan the cable route early. In HDB flats, electrical works must be done by a licensed electrical worker, and floor slabs must not be tampered with.
Peninsula
- Mid-range Mid-range
- Durability: excellent
- Upkeep: low
A counter that extends from an existing run or wall, open on three sides. The most practical island alternative for HDB flats, as it needs a walkway on one side less.
Best for: Open-concept BTO and resale HDB kitchens
Pros
- Fits where a full island will not
- Uses fewer walkways, so more floor space is left
- Can replace a removed kitchen wall as a soft divider
- Easy to connect to existing power and plumbing
Cons
- Only one end is free, so circulation is less flexible
- Can create a dead-end corner
- Less of a statement than a full island
- Seating on the open side needs knee space
A peninsula is often the best answer in an HDB flat where a kitchen wall has been removed. Instead of a wall, the counter continues into the living or dining space, giving prep space on the kitchen side and a bar or serving ledge on the other.
HDB requires approval for demolishing or altering internal walls, and lightweight partition walls can only be removed up to the underside of the RC beam or slab. Reinforced concrete structures must not be tampered with. Check what is possible before designing around a removed wall.
Plan the same clearances as for an island on the open sides (about 1 metre for a work aisle).
Island with hob
- Premium Premium
- Durability: excellent
- Upkeep: medium
An island with the cooktop in it, so the cook faces the room. Popular in show kitchens, but it needs a hood above the island and a gas or power supply in the middle of the floor.
Best for: Large condo and landed kitchens with light cooking
Pros
- The cook faces family and guests
- Dramatic focal point
- Frees up wall space for tall units
- Works well with induction for light cooking
Cons
- Needs an island or ceiling hood, which captures fumes less effectively than a wall hood
- Gas or power must be routed to the middle of the room
- Oil splatter reaches the dining or living area
- Rarely practical in HDB flats
NKBA guidance (as reported by kitchen industry references) recommends about 9 inches (about 230mm) of counter behind a cooktop on an island, plus landing space of about 12 inches (305mm) on one side and 15 inches (380mm) on the other.
In HDB flats, HDB says gas pipes must not be embedded in floor screed or finishes, gas pipes must not be enclosed in false ceilings, and gas appliances and gas pipe terminations are not allowed in sleeping areas. All gas pipe alterations must be done by City Energy or an EMA-licensed gas service worker. Together these rules make a gas hob in a central island difficult in most HDB flats.
An induction hob in an island is simpler, as it needs only a dedicated power supply. See cooker hobs and hoods.
Island with sink
- Premium Premium
- Durability: excellent
- Upkeep: medium
An island with a prep or main sink, so you can wash and chop facing the room. Needs water supply and a waste pipe routed through the floor finishes.
Best for: Condo and landed kitchens with a clear route for waste pipes
Pros
- Wash and prep while facing the room
- Keeps the wall run free for cooking and appliances
- A small prep sink adds a second work zone
- No hood needed
Cons
- Waste pipe needs a fall to the stack, which limits position
- Water splashes onto the dining side
- Dirty dishes are on display
- Plumbing works add cost and must be done by a licensed plumber
HDB's guidelines allow diversion of a sink waste pipe within the floor finishes but not in the floor slab, and require works to comply with PUB requirements and be carried out by a PUB licensed plumber. The distance from the sink to the existing stack, and the thickness of floor finishes available for a pipe with a fall, decide whether an island sink is possible.
NKBA guidance (as reported by kitchen industry references) suggests landing space of about 24 inches (610mm) on one side of a sink and 18 inches (455mm) on the other.
Raise the counter edge on the dining side, or add a small upstand, if you want to keep splashes off guests.
Island with dining extension
- Upper Upper
- Durability: excellent
- Upkeep: low
An island with an overhang or a lower table section for seating, so it doubles as the dining table. A good way to save space in smaller homes.
Best for: Couples and small families who eat most meals in the kitchen
Pros
- Replaces a separate dining table
- Brings people together while cooking
- A lower table section is more comfortable than bar stools
- Can mix materials (stone island, timber table)
Cons
- Overhangs need support brackets under stone
- Bar-height seating is less comfortable for long meals
- Needs clearance behind seated diners
- Food prep mess is next to the eating area
Kitchen design references based on NKBA guidance give knee space depths of about 15 inches (380mm) at standard counter height (about 36 inches or 915mm), 12 inches (305mm) at bar height (about 42 inches or 1,070mm) and 18 inches (455mm) at table height (about 30 inches or 760mm), with each seat about 24 inches (610mm) wide.
Behind seated diners, allow about 32 inches (815mm) if nobody passes, 36 inches (915mm) to edge past, and 44 inches (1,120mm) for a walkway behind.
A stone overhang needs steel brackets or a supporting leg; ask your fabricator what overhang the slab can take unsupported.
Slim island or bar counter
- Mid-range Mid-range
- Durability: good
- Upkeep: low
A narrow island (often 400mm to 600mm deep) used as a prep ledge, breakfast counter or divider. Fits spaces where a full-depth island would block circulation.
Best for: Smaller HDB flats and galley-style kitchens opened to the living room
Pros
- Fits narrow spaces
- Adds a breakfast or work-from-home spot
- Visually lighter than a full island
- Cheaper than a full island
Cons
- Limited storage
- Not enough depth for a hob or sink
- Narrow tops can feel cramped for prep
- Stools need tucking away to keep the walkway clear
A slim island is the most common island that genuinely fits in a 3-room or 4-room HDB kitchen. Its job is usually to be a breakfast counter or serving ledge rather than a work station.
Work out the walkway first, then the island depth. If your kitchen space allows only a narrow counter while keeping about 1 metre clear on each working side, a slim island will feel better than a deeper one that blocks movement.
Consider a timber or compact laminate top for a lighter edge, and add a power point for a laptop or small appliances. See countertops for top options.
Mobile island or kitchen trolley
- Budget Budget
- Durability: moderate
- Upkeep: low
A freestanding island on lockable castors, or a sturdy kitchen trolley. Moves where you need it and leaves the floor clear when you do not.
Best for: Small kitchens, rentals and owners who are unsure about a fixed island
Pros
- Lowest cost and no renovation works
- Moves out of the way when not needed
- Can be tested before committing to a fixed island
- Takes nothing away from resale flexibility
Cons
- Less stable for heavy chopping or kneading
- Limited storage and counter area
- No built-in power, water or gas
- Castors need locking and can mark floors
A mobile island is the low-risk way to find out whether you actually use an island. Choose one with locking castors, a top at the same height as your counter, and a heavy enough frame that it does not wobble when you chop.
If you want it to feel built-in, ask your carpenter to make one in the same finish as your cabinets, on heavy-duty castors. Park it against a wall or under a counter when not in use.
This suits IKEA-style and minimalist homes and rental flats.
Two-level island (prep plus raised ledge)
- Upper Upper
- Durability: excellent
- Upkeep: low
An island or peninsula with a raised ledge on the living side, hiding prep mess from view while giving a bar-height counter for drinks and seating.
Best for: Open kitchens where you want to hide the mess
Pros
- Hides dirty dishes and prep from the living room
- Creates a bar-height counter for seating
- Gives a splash guard for an island sink
- Clear zoning between kitchen and living area
Cons
- Breaks up the counter into smaller surfaces
- Bar-height seating is less comfortable
- More complex to fabricate in stone
- Can look bulky in a small space
A raised ledge, often about 100mm to 300mm above the working counter, works well where an open kitchen faces the living room. You get a clean view from the sofa, and guests get a perch to sit at.
At bar height (about 42 inches or 1,070mm), NKBA-based references suggest about 12 inches (305mm) of knee space. Use bar stools with footrests.
The raised section can be a different material (timber or a contrasting stone) to break up the volume. This is a common detail in contemporary and urban open-plan homes.
Does an island fit your kitchen?
Measure the space, then subtract the clearances. NKBA planning guidelines, the most widely used kitchen planning reference, recommend:
- Work aisle (between the island and the counter where you cook): at least 42 inches (about 1,070mm) for one cook, 48 inches (about 1,220mm) for two
- Walkway (where people pass but do not work): at least 36 inches (about 915mm)
- Behind seated diners: about 32 inches (815mm) if no one passes, 36 inches (915mm) to edge past, 44 inches (1,120mm) to walk behind
If the island leaves less than about 1 metre on its working sides, choose a peninsula, a slim counter or a mobile island instead. Mock it up first: tape the island outline on the floor and walk around it with the fridge and oven doors open.
HDB and condo rules that affect islands
- Walls: HDB requires approval for demolishing or altering internal walls. Lightweight partition walls can be removed up to the underside of the RC beam or slab, existing RC structures must not be tampered with, and removing non-load-bearing RC elements needs a Professional Engineer to supervise. Structural walls cannot be hacked. See our HDB renovation permit guide.
- Gas: HDB says all gas pipe alterations must be carried out by City Energy or an EMA-licensed gas service worker, gas pipes must not be embedded in floor screed or finishes or enclosed in false ceilings, and gas appliances are not allowed in sleeping areas. In flats where the kitchen opens to a flexible space used as a bedroom (such as some 2-room Flexi flats), HDB requires a full-height wall with a door between the gas appliances and that space.
- Water and waste: sink waste pipes can be diverted within floor finishes but not the floor slab, and must be done by a PUB licensed plumber.
- Electrical: power points in an island must be installed by a licensed electrical worker.
- Condos: check your MCST by-laws for renovation approvals and works hours before planning floor or wall works.
Choosing the right type
- Small HDB kitchen, wall stays: mobile island or nothing.
- HDB kitchen opened to the dining area: peninsula or slim island, used for prep and casual meals.
- Large HDB (5-room, executive) or condo with space for 1 metre on all sides: full island for prep and storage, optionally with a dining extension.
- Large condo or landed home: island with a sink or induction hob, with a proper hood.
Budget
SmartCalculator estimates a kitchen island or peninsula at about $1,500 to $4,000 per unit (2026, indicative). Add the countertop (a large island top can be the single most expensive piece of stone in the kitchen), any power, plumbing or gas works, and a ceiling or island hood if there is a hob. For overall costs, see resale HDB renovation costs.
Common mistakes
- Planning the island from a plan drawing without checking real clearances.
- Putting a gas hob in an island in a flat where gas cannot legally be routed there.
- Forgetting power points, which leaves a big counter with no place to plug in a kettle.
- Choosing bar-height stools for an island that will be the main dining table.
How JIAHOME helps
We test island layouts in 2D and 3D before anything is built, so you can see walkways and sight lines from the living room. Book a free consultation.
