Kitchen Island Planning – Hob or Sink?

Key Takeaways

• A hob on your island puts you at the centre of the room while you cook, facing your guests rather than a wall
• A sink offers a cleaner workflow for food prep and washing up, with fewer ventilation constraints and lower installation cost
• Both options require specialist work (gas or electrical re-routing, or a new plumbing run) so factor the additional cost into your budget early

Adding your hob or sink to your island also removes the need for base cabinets against your walls. If you’re looking for a more modern look, this means you can have larder and pantry units along the wall and have your worktop, hob, and sink on your island creating a streamlined look. This also allows you to maximise your storage and have more storage solutions too!

Before diving into island decisions, it helps to have the full picture — read our complete guide to planning and designing a new kitchen.

Deciding between a hob or a sink is largely down to personal preference. There are lots of different things to consider when deciding if you should have a hob or a sink, or both, on your kitchen island. Hobs make the cooking process much more sociable, where sinks make prep much easier! Our designers are full of tips and tricks to make the most of your kitchen space. We’ve compiled everything you need to know if you’re considering adding a hob or a sink to your island.

Gas or electricity supply
If you’re moving your hob to your island, you’ll need to consider the power or gas supply that will go along with it. You may need to get specialists in to re-route your gas pipes or to rewire your electrics. Bare this in mind not only for the inconvenience but for the cost too.

If you are going with an induction hob, you will need a dedicated electrical circuit installed by a qualified electrician. Induction is the most popular choice for island hobs because there is no open flame, it is faster to heat than gas, and the surface stays cool to the touch around the cooking zone, reducing the risk of burns for anyone passing the island.

Air flow and extraction

Consider how you’ll remove all that steam, smoke and other pollutants from the air. Can you have a floating extractor above your hob, a built-in extractor/hob, or a pop-up extractor in your island? If the answer to all of these questions is ‘no’ or ‘I don’t want to’ then consider other air flow solutions such as air bricks. As long as you have enough air flow you are not legally required to have an extractor fan with your hob. Although it is advised.

One of the most popular extraction solutions for island hobs is a downdraft extractor. These units sit flush with the worktop when not in use and rise up behind the hob when cooking. They are a cleaner aesthetic choice than a ceiling-mounted hood, do not obstruct sightlines across the kitchen, and work well for both induction and gas island hobs. If you are planning a hob on your island, it is worth discussing downdraft extraction with your designer early, as the unit affects the island dimensions and worktop specification.

Space around your hob
As well as the space you’ll need for the hob itself, you also need to leave yourself a minimum of 300mm either side (500mm would be better) this allows plenty of space for your pan handles – so no one knocks them off as they walk around your island.

Usability
Adding a hob on your island can make cooking a sociable experience! Rather than facing the wall if your hob is on a run of base cabinets, you can face the room and keep an eye on the chaos.

Aesthetics

Whilst we strongly believe all kitchens should be practical and work well for their owners, we also want them to look beautiful too. Think about the flow of your kitchen and how it will look from each angle with your hob on your island. If you opt for an extractor fan above your hob, will this block the view of your kitchen or prove to be unsightly? Does it feel like the hob should actually be elsewhere?

A sink on the island suits kitchens where workflow and food preparation take priority. It keeps you connected to the rest of the room while you rinse, prep, and wash up, which works especially well in open-plan spaces. Here is what to consider before committing to a sink on your island.

Things to consider when adding a sink to your kitchen island:

Plumbing
Similarly to your gas and electric with a hob, if you want a sink and tap on your island, you’ll need to plumb it in. This can be expensive depending on where your plumbing is currently. Running water and waste pipes a long distance will likely add a significant cost to your project.

Space around your sink
You want plenty of space for splashes, so give yourself around 300mm of space for this. Plus, if you’re going to be piling up the dishes next to your sink, consider how much space you’ll need for this. As a minimum we would suggest having 500mm on the dish draining side of your sink.

Usability
Like with a hob, consider where you want to wash the dishes. Do you want to look out to the garden, or into your room? Think about the answer to these questions and don’t just put your sink in the island for the sake of it. It can be expensive and impractical in some instances, so be sure you’re doing what will actually work for you!

Aesthetics
Unlike with a hob, you don’t need to consider an extractor fan with a sink, so other than the tap, there isn’t a lot to spoil your view across the kitchen. It also means you can add pendant lights above the island for a striking feature.

If your island is large enough, having both is a genuine option and one that many of our customers choose. A kitchen island with both a hob and a sink gives you a fully functional working area at the centre of the room, with everything within reach during cooking.

As a general guide, you will need an island of at least 2.4 metres in length to comfortably accommodate both a hob and a sink, with the space between them acting as a dedicated prep zone. Most designers recommend positioning the hob and sink at opposite ends of the island rather than side by side, which separates the cooking heat and the splash zone from the sink.

The installation cost will be higher, as you’ll need both the plumbing run and the gas or electrical re-route. If budget allows, it is the most practical island configuration for households that do a lot of cooking and entertaining. For more on planning the layout, take a look at our guide to the dos and don’ts of kitchen island design.

Everybody has different priorities when it comes to using their kitchen and designing a new kitchen, that’s why deciding between a hob or a sink on your island largely depends on your preference. It’s important to factor in the different costs and implications of including both in your design. If you’d like more advice, why not get in touch? Our designers are on hand to walk you through our personal design process and discuss all of your wants and needs for your new dream kitchen.

A few questions that can help you decide:

• Do you cook for guests regularly? A hob on the island keeps you part of the room while you cook. A sink can also work socially, but doesn’t carry the same focal-point quality.

• How is your kitchen used day to day? If prep and washing up are the priority, a sink will earn its place more than a hob.

• What is your island size? Smaller islands often work better with one or the other. Larger islands can support both.

• What is your budget for installation? A hob generally costs more to install than a sink due to extraction and gas or electrical requirements. Get quotes from your tradesperson before committing.

• What does your existing plumbing and electrical layout look like? The closer your island is to existing supplies, the lower the installation cost.

Our team of designers can help you map this out during your free design consultation. You might also find our complete guide to planning a new kitchen useful before your first appointment.

Related reading: Window placement: is a window under the sink better than in the island?

If you would like to explore next steps, you can download our brochure for inspiration.

If you’re looking at designing your new kitchen but not sure what to do next, book a short, 15 minute call with one of Smile Kitchens expert designers.

Is it better to have a sink or a hob on a kitchen island?

A kitchen island hob is better for households who prioritise social cooking and entertaining, as it faces you into the room while you cook. A kitchen island sink is better for households who prioritise food preparation workflow and practical cleanup. In simpler terms, choose a hob if cooking is the main event, and a sink if prep and washing up matter most. Neither is universally better. It depends on how your household uses the kitchen.

Should you have a sink on a kitchen island?

A sink on a kitchen island is worth having if your kitchen is open-plan and you want to stay connected to the room while working. A kitchen island sink is a practical addition that improves food preparation workflow and reduces the feeling of being cut off when cleaning up. In simpler terms, if your island is large enough to accommodate the plumbing run and you spend a lot of time at the sink, it is very likely worth the installation cost.

Can you have both a hob and a sink on a kitchen island?

Yes, you can have both a hob and a sink on a kitchen island if the island is large enough, typically 2.4 metres or more in length. A kitchen island with both a hob and a sink gives you a fully functional central workstation for cooking, prepping, and washing up. In simpler terms, if your kitchen layout and budget allow it, combining both is the most practical island configuration for households who cook regularly.

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