Window Seat Ideas for London Homes: Bay, Alcove and Built-In
The best window seats in London homes are built in: a bench fitted to the bay or recess, storage underneath, and shelving or cupboards in the alcoves beside it. Made to the exact walls, they use space that is otherwise wasted, and they look as though they were always part of the house. At Tenen we build this kind of carpentry as part of our refurbishments across West and Central London, and this guide shows you which layouts work, which sizes to aim for and what to decide before anyone picks up a saw.
TL;DR
A built-in seat in a bay or alcove adds seating, storage and a calm corner without taking any floor area.
Aim for a finished seat height of about 45 to 47 cm, so it sits like a dining chair, and plan the cushion thickness into that figure.
Pair the seat with shallow alcove shelving or cupboards on either side, so the nook feels framed rather than crowded.
Decide on radiators, sockets, curtains or blinds and storage access before the joinery is drawn, not after.
Period London houses suit bespoke carpentry best, because walls, floors and window reveals are rarely square.
Table of Contents
Why a window seat earns its place
House & Garden’s gallery of designer-led ideas calls the window seat a space-saving way to add seating to a living room, a restful spot in a bedroom and a storage solution in small spaces. That covers most London homes. Rooms are often compact, ceilings high and windows generous, so the window is the best place to put an extra function.
There is also an old logic to it. House & Garden traces the built-in seat to the Arts and Crafts movement, when furniture moved from ornate freestanding pieces to features conceived as part of the architecture, as at William Morris’s Red House. Its writer suggests the appeal is a softer kind of privacy: a place at the edge of a busy room where you can observe and still be included. That is exactly what a seat at a front window gives a family living room.
Bay window seat ideas
Bay windows are the most common reason Londoners ask about window seats, and the Victorian and Edwardian terraces of Fulham, Chiswick and Hammersmith have plenty of them. House Beautiful UK says seats work well in bays to encourage you to pause and enjoy the view, and that an upholstered seat with plenty of cushions is even better with storage beneath.
Follow the shape of the bay
A bay has three or five faces, and a seat that follows them all feels generous. A single continuous bench wrapped around the angles gives the most seating and looks the most intentional. Because Victorian walls are seldom straight, each angle needs scribing to the plaster. This is the main reason a made-to-measure seat looks better than a flat-pack bench pushed into the recess.
Make it part of the room’s panelling
A lovely example comes from a renovated Victorian terrace in north-east London, where the owners built a bench seat in the office bay with half-height tongue-and-groove panelling, with shelving and storage alongside. Panelling to the same height as the rest of the room ties the seat into the architecture. Ideal Home shows the same idea from another angle, with the seat front panelled to match the wall panelling behind it.
Curves and kitchens
If your bay is rounded, a curved seat is possible. Dezeen’s lookbook of built-in seats features a curved window seat with black-leather cushions that works as seating and storage in a Paris apartment, and a curved plywood seat with storage spaces in a large rounded bay. In a kitchen, a bay bench is an informal breakfast spot. House & Garden describes designer Matilda Goad’s London kitchen, where a reeded bench built into the bay is upholstered in blue denim, balancing informality with a bit of grandeur. If you are planning a new kitchen anyway, the seat can be designed with the cabinetry so the two line up.
Alcove ideas beside a chimney breast
Many West London living rooms have a pair of alcoves either side of the chimney breast. They are the easiest place to start if you want built-in storage, and they combine well with a window seat when the chimney breast sits near a window or when a bay is flanked by two recesses.
Shelves, cupboards or both
The classic London treatment is a cupboard below and open shelving above. Closed doors at the bottom hide the things that never look tidy: games, paperwork, the router and its cables. Open shelves above carry books and objects. Mu-Art Design is among the firms who suggest mixing glazed doors, open shelves and concealed drawers for a balance of display and everyday storage, though the principle is simple: keep what you use daily behind a door and show what you love.
Built-in shelves work best when they are made to the exact depth and height of the alcove. Our own guide to carpentry ideas for homes covers the types of fitted joinery that suit period rooms.
Floor-to-ceiling around a window
Where a window sits between two walls, full-height bookcases on both sides frame it. Matching units on either side create balance and help a smaller room feel more cohesive. The seat then becomes the centrepiece of a symmetrical wall, and the whole thing reads as one piece of furniture rather than three.
Keep shelves shallow beside a seat
A seat in a narrow recess needs elbow room. A good rule is to keep side shelves shallow, in the region of 20 to 25 cm, so books stay within reach without eating into the seat width. Deeper cupboards belong below the seat or on a wall that does not frame it. Adjustable shelves let you change spacing later for large art books or smaller paperbacks.
Window seat storage ideas
Storage is why most people choose a built-in seat over a loose bench. There are three main ways to do it, and each suits a different room.
Storage type | Best for | Watch for |
Lift-up lid | Bedding, seasonal items, rarely used things | Cushion must be removed to open it; items at the bottom are hard to reach |
Drawers in the front | Everyday items, toys, shoes | Needs clear floor space in front of the seat |
Open cubbies or shelves under the seat | Baskets, books, children’s things | Looks tidy only if you keep it tidy |
Ideal Home suggests drawers with push-click fronts where there is space in front of the seat, as they are easier to reach than lift-up cushions. In a hallway or kitchen where the floor in front stays clear, drawers are the practical choice. In a bedroom bay with a bed close by, a lift lid with gas struts is often better.
Our article on space-saving storage ideas shows how seat storage fits into a wider plan for a small home.
Window seats for every room
Living room
Use the seat for an extra place to sit when guests come, and flank it with shelves for books and lamps. An extra-deep cushion can turn the seat into a day bed, as Ideal Home shows with a seat extended out from a shelving unit. A reading lamp on a swing arm or a wall light in the alcove makes the corner usable after dark.
Bedroom
A seat at the foot of the bed or in a bedroom bay gives you somewhere to sit while putting on shoes and a home for spare bedding. If you are redoing the whole room, our bedroom renovation ideas guide will help you place the seat alongside wardrobes and lighting.
Kitchen and dining area
A seat at the end of a run of cabinets creates informal seating, as House Beautiful UK points out. In an open-plan extension, a bench along a glazed wall with a table in front is a sociable arrangement that saves the space of several chairs. If you are considering a bigger project, our extension service includes the joinery for details like this, and our guide to wrap-around extension design shows how a glazed side return suits a bench.
Loft and eaves
Sloping ceilings waste floor space, but they make fine seats. SheerLuxe’s tour of a small west London Victorian flat describes built-in storage and window seats in the eaves, with ceiling-high bookcases and upholstered pads for guests. If you are converting a loft, plan the seat and eaves storage at the design stage, when the structure is open. See our loft conversion service.
Stairs, landings and hallways
A landing window is often the quietest spot in the house. A shallow seat with drawers underneath turns it into a reading corner without blocking the route to the bedrooms.
Sizes that make a seat comfortable
A seat that looks right but feels wrong ends up as a place for laundry. These are the dimensions to settle first.
Seat height. Grand Designs Magazine says benches sit comfortably at 45 to 47 cm, and that the window height and cushion depth should be factored into the final frame height. Remember the cushion is on top, so the timber box is lower than the finished height.
Depth. Enough for upright sitting with your back against the wall, which in many homes means roughly half a metre. If you want to lounge or lie down, go deeper, but add back cushions, because a deep bench with no back support is uncomfortable.
Cushion. A firm, high-resilience foam with a removable washable cover lasts far better than soft foam. Choose it for support first and thickness second.
Sill clearance. Leave enough space between the seat and the window sill or handle so that windows open freely and cushions do not catch.
Storage opening. Make the opening big enough for the things you want to store, such as boxes or folded bedding.
How it is framed
Grand Designs Magazine describes framing a seat with 45 x 95 mm timber battens fixed to all three walls of the recess at seat height, plus a floor batten and supports. On a plain, square recess that is straightforward. In a period house with bowed plaster and a sloping floor, it is where a joiner’s scribing and fitting pay off.
Practical points to settle before building
Radiators and heating
Many London bay windows have a radiator beneath them. A seat built over one must not trap the heat or block the output: the front needs a ventilated panel or grille, and you should ask your heating engineer whether the radiator should be moved or replaced with a slimmer model first. Doing this during a wider refurbishment is far easier than changing it afterwards.
Sockets, lighting and cables
Place a double socket within reach of the seat for lamps and chargers, and decide on lighting before the joinery is made. Chasing cables into finished panelling is messy. Our full property refurbishment covers electrical, plumbing and carpentry together, which keeps these decisions in one plan.
Curtains and blinds
Seat tops, curtains and blinds all compete for the same window zone. Decide whether curtains hang to the floor behind the seat or stop at the sill, and whether a blind fits inside the reveal. A seat in front of a window with floor-length curtains needs curtains that hang clear of the cushion.
Sunlight and fabric
South-facing windows take a lot of sun. Aspiration Blinds’ UK bay window guide notes that UV rays can fade fabric colours, so it makes sense to choose fabrics that withstand sunlight for furniture near the glass. The same thinking applies to floors: if the seat sits in a sunny bay or sunroom, a floor that stays stable in strong light matters, and these sunlight-resistant flooring ideas are worth a look when choosing finishes.
Period features
If your house has original sash windows, shutters or cornicing, the seat should respect them. Shutters need space to fold back, and sashes need to slide. Our guides to period property renovation and the advantages of period upgrades in West London explain how to add modern comfort without losing character. If your building is listed or in a conservation area, check with your local council whether permission is needed before altering windows or fixed features.
Materials and finishes
Painted MDF suits panelled, contemporary schemes and takes a sharp, even finish. Solid timber or veneered plywood suits natural or stained looks, and plywood edges can themselves be a feature, as in the curved seat Dezeen describes. Painting the seat and surrounding alcove units in one colour is a popular way to make the whole wall feel unified, and a deeper tone makes the nook feel cosier. For the seat top, an upholstered cushion in a hard-wearing fabric is the norm; a slim cushion on a wide sill is the simplest option where there is no room for a box.
Why joinery works best done properly
A window seat looks simple, but it joins carpentry, decorating, sometimes electrics and heating, and it has to fit walls that were built a century ago. That is why we treat it as part of a project rather than a flat-pack job. Our piece on the role of joinery in a home build explains how joinery is planned alongside the rest of the work so the finished room feels cohesive.
We have been refurbishing homes in West and Central London since 2006, and the window seat is one of the details that delights homeowners most. It is rarely the biggest item in a project, yet it is the one people sit in every day. Our approach is to design the seat, alcove units and finishes together, as one piece of carpentry that suits the room. We carry out the work in-house with director oversight rather than passing it down a chain of subcontractors, and we give an itemised quotation after a site survey, so you know what the seat, the shelving and the decorating involve before you commit. If you are already planning a refurbishment, a kitchen, a loft or an extension, that is the ideal moment to add a seat: the walls are open, the heating and electrics are being planned and the joinery can be built to match everything around it. Mateja
Our view on window seats
Planning a window seat with Tenen
If you would like a seat, alcove shelving or a full set of fitted units for your home, our team works across Fulham, Chelsea, Kensington, Chiswick, Hammersmith and Notting Hill. Tell us about the room and we will arrange a site visit. You can see the range of work on our services page, or start with a kitchen refurbishment or full property refurbishment if the seat is part of a bigger plan.
FAQ
How deep should a window seat be?
For sitting upright with your back against the wall, around half a metre is a comfortable depth. If you want to stretch out, go deeper and add back cushions. Whatever the depth, set the finished height, with cushion, at roughly 45 to 47 cm, as Grand Designs Magazine suggests.
Can I build a window seat in a bay window with a radiator underneath?
Yes, but the radiator needs planning. The front of the seat should be ventilated so heat can escape, and in some cases the radiator is better moved or replaced with a slimmer one. Speak to a heating engineer, or have it handled as part of a wider refurbishment.
What is the best storage for a window seat?
Drawers suit places with clear floor space in front, as they are easier to reach than a lift-up lid. Lift-up lids suit bedding and seasonal items in bedrooms. Open cubbies work for books and baskets if you are happy to keep them tidy.
What can I put in alcoves either side of a chimney breast?
Cupboards below with open shelves above is the classic London treatment. Keep shelves shallow if they sit beside a seat, and use adjustable shelves so you can change the spacing. Full-height doors suit rooms where storage volume matters more than display.
Is a window seat suitable for a small room?
Yes. House & Garden notes that a window seat is an excellent space-saving idea, adding seating and storage in one piece. In a small room it also uses the window zone, which would otherwise go unused.
Sources
Recommended
Comments