How to Plan a Kitchen Extension with Coastal Views

Design for the weather first, the view second

There is a moment on every coastal project when somebody suggests a full wall of glass facing the sea. It is a lovely idea, and on a still July evening it is exactly right. But a kitchen extension on the UK coast has to earn its keep in February, when the wind is coming off the water at forty miles an hour and the rain is travelling sideways.

So start with the site rather than the mood board. Which way does your best view face, and which way does the weather come from? On much of the British coastline those two things arrive from the same quarter, usually the south-west. That does not mean abandoning the glazing, but it shapes everything downstream: the depth of the roof overhang, the door type, the frames, and where you stand to make a cup of tea.

Walk the plot at different times of day if you can. Note where wind funnels between neighbouring buildings, where sand collects against a wall, and where salt is already dulling the paintwork on your car.

Glazing that frames the view without letting the weather in

Think of the glass as a series of framed pictures rather than one enormous hole in the wall. A single uninterrupted pane can be magnificent, but it is also the most exposed to wind loading, the hardest to clean, and the most likely to overheat a south-facing room in August.

• Sill height matters. Dropping the sill to floor level opens the view beautifully, but check with your builder that the structural lintel and drainage detail can take it, and that you are not creating a wind tunnel at ankle height.
• Sliding doors versus bi-folds. Sliders give you a bigger clear opening per leaf and seal better against driving rain. Bi-folds open the whole wall, which is wonderful on a calm day and a liability in a gale. Many coastal homes end up with one large slider plus a separate fixed picture window.
• Specify the glass properly. Triple glazing with a solar-control coating reduces glare and overheating without losing the view. If the elevation faces the worst of the weather, ask for enhanced weather sealing and consider a slightly recessed track.

Whichever you choose, make sure the frame finish is a powder-coated aluminium or a good quality timber-aluminium composite. Bare timber on a west-facing coastal wall will need repainting far more often than you would like.

Roof overhangs, shelter and the outdoor room

The single most useful thing you can add to a coastal extension is a decent overhang. A projection of 600mm to 900mm keeps rain off the doors, shades summer sun, and turns the threshold into a usable space rather than a wet step.

Think about where the wind drops too. A projecting wing wall, a planted windbreak of hardy hedging, or a slatted screen on the exposed side can transform an open terrace into somewhere you actually sit in April. Choose materials that will not lift or rot: powder-coated metal, marine-grade fixings, and paving laid on a properly bound base rather than loose sand.

Materials that survive salt, wind and UV

Salt spray travels further inland than most people expect, and UV will fade anything that is not specified for the job. A few rules of thumb:

• Fixings first. Use A4 grade stainless steel for anything external. Ordinary steel screws will bleed rust stains down a new render within a season.
• Timber. Thermally modified or naturally durable species perform best. Avoid anything with a soft, open grain on a west-facing elevation.
• External joinery. Aluminium is low maintenance and does not mind salt. Powder-coated steel is fine too, provided the coating is intact.
• Flooring. Inside, porcelain tiles with a low-slip rating cope with sandy feet and wet dogs. Engineered oak is warm underfoot but wants a durable, sealed finish.

Ask yourself one question about every external material: how will this look in ten years if nobody touches it?

Kitchen layout: working with the light and the view

The temptation is to put the sink under the window so you can watch the sea while you wash up. That works if the window faces north or east. On a west-facing wall, a sink directly under the glass becomes a mirror of glare for half the afternoon.

Consider instead an island or peninsula set back from the glazing, with the hob and prep area facing the view. Keep the working triangle short, and plan the flow from car to fridge to worktop so sandy shoes and shopping bags do not cross the cooking zone. A dedicated landing area near the entrance, with a hard floor and a place to drop wellies, will save the rest of the room.

Warmth, ventilation and the practical details

Glass is a poor insulator compared with a solid wall, so a heavily glazed extension needs a properly sized heating source and an underfloor system that responds gently rather than blasting hot air. It also needs ventilation: coastal homes suffer from condensation as much as from draughts, and a mechanical extract or a well-placed trickle vent keeps the room fresh without opening a door to the wind.

Finally, check the planning position early. Many coastal extensions fall under permitted development, but conservation areas, Areas of Outstanding Natural Beauty and listed buildings all bring their own rules, and a quick conversation with the local authority will save months later on.

Get the shelter, the fixings and the glazing right, and the view will look after itself for years to come.