Alcove Shelving and Cupboards: Getting the Proportions Right

Alcoves either side of a chimney breast are one of the most useful spaces in an older house, and one of the easiest to get wrong. A cupboard that sits too tall, shelves that are too deep or spacing that looks random can make even well-made joinery feel like an afterthought. Get the proportions right and the same alcove looks as if it was always meant to be there. This guide covers the measurements and rules of thumb we work to, so you can plan your own alcoves with confidence.

Start with the room, not the cupboard

Before thinking about doors and shelves, look at what the room already gives you. The chimney breast, the skirting, the picture rail, the window heights and the fireplace itself all set lines that fitted joinery should respect. In many Victorian and Edwardian homes across Hampshire, the fireplace mantel is the strongest horizontal line in the room, and it is a natural reference point for the top of a base cupboard.

Walls in period properties are rarely square or plumb, and chimney breasts often lean or taper. That is fine, because bespoke joinery is scribed to the walls rather than pushed into a gap, but it means every alcove needs measuring at several heights and depths. Two alcoves in the same room can differ by a few centimetres, and good design hides that difference rather than exaggerating it.

Base cupboard height and depth

The base cupboard does most of the visual work. A few guidelines that suit most rooms:

• Height: roughly 75 to 90cm to the top of the worktop. Lining it up with the mantelpiece or just below it usually looks best.
• Depth: follow the depth of the chimney breast where you can, often 30 to 45cm, so the cupboard front sits flush or just proud of the breast.
• Top thickness: a 25 to 30mm top reads as solid and furniture-like; thinner tops can look flimsy on a wide alcove.
• Plinth: set the kickboard to match the existing skirting height, or carry the skirting profile across the front for a built-in look.

If the cupboard will house a TV box, speakers or a games console, allow for cable routes and ventilation at the planning stage. Drilling holes after the fact rarely looks tidy. Deeper cupboards also make it harder to reach the back, so for storage of toys or files, a pull-out shelf or drawer can be more useful than a single deep void.

Shelf depth and spacing

Shelves above a base cupboard should usually be shallower than the cupboard beneath. A shelf depth of 25 to 30cm handles most books and ornaments, and the step back from the worktop gives a useful ledge and stops the upper section feeling top heavy. Where the alcove is shallow, the shelves can simply run the full depth.

Spacing matters more than people expect. Evenly spaced shelves look calm and deliberate, while spacing that increases slightly towards the bottom, with the tallest gap nearest the worktop, has a traditional, grounded feel. As a rough guide, 25 to 35cm between shelves suits paperbacks and display items, with 35cm or more for larger books and records. Avoid lining a shelf up exactly with a picture rail or window head unless you mean to, as near misses look like mistakes.

Shelf thickness affects both appearance and strength. On a typical alcove span of 90 to 120cm, a shelf of 25mm or more with support along the back, or concealed brackets fixed into sound masonry, will resist sagging under a full load of books. Thin shelves on long spans will bow over time, however good they look on day one.

Doors, frames and finishing details

The style of the doors should suit the house. Shaker style panels work in most period and modern homes, while beaded or moulded panels can echo original features in older properties. Keep the door rails and stiles in proportion to the cupboard width; narrow doors with chunky frames can look heavy, so wider alcoves often suit a pair of doors rather than one.

Small details make the difference between fitted and furniture. A face frame scribed tight to the wall, a top that overhangs the doors slightly and matching the existing skirting and architrave profiles all help the joinery sit comfortably in the room. Painting the units the same colour as the walls makes a small room feel bigger, while a contrasting colour turns the alcoves into a feature.

Think about lighting too. LED strips under shelves or in a recessed channel need to be planned before anything is built, so the wiring can run behind the joinery rather than across it.

Planning your alcove joinery

Every job differs, and the best proportions depend on your room, your walls and what you actually want to store. Our advice is to start with a clear list of what goes in the cupboards and on the shelves, then let the room's existing lines guide the heights. A carpenter will then survey each alcove properly, allow for out-of-true walls and suggest adjustments that keep the two sides balanced.

PRM Carpentry designs and builds made-to-measure alcove cupboards, shelving and other fitted furniture across Hampshire. If you would like help planning yours, have a look at our custom projects page or get in touch for a free, no-obligation quote.