There’s a particular charm to a mews house: the old coach doors, the cobbled yard, the sense of a secret village tucked behind grand terraces. But come January, that charm can feel a little thin. Many mews properties were built as stables and coach houses, with solid brick walls, single-glazed windows and little thought for keeping the cold at bay. The good news is that you can make one noticeably warmer without ripping out its soul. It takes a methodical approach, a respect for historic fabric, and — often — a bit of cottage-garden cunning.

Understanding Your Mews House’s Quirks

Before you reach for the sealant gun, spend an hour or two understanding how your home behaves. Mews houses are often narrow, with rooms arranged over two or three floors and a footprint that leaves little room for conventional insulation. Walls are frequently solid brick, which means they breathe — and that breathability is a feature, not a fault. If you trap moisture inside, you risk damp and timber decay. Similarly, many mews have no loft in the traditional sense; the roof space may be a shallow void or a converted room. That limits what you can do, but it doesn’t rule out improvements. Note where draughts appear on a windy day: around window frames, under doors, through letterboxes, and up chimneys. These are your first targets.

Draught-Proofing Windows and Doors

Draught-proofing is the cheapest, least invasive way to make an old mews feel warmer. Start with windows. For original sash windows, fit brush or wiper seals into the staff beads and meeting rails. A good quality seal can cut draughts without stopping the window from opening. If your windows are casement style, foam or rubber seals around the frame work well. For a quick fix, removable secondary glazing film is surprisingly effective — it creates an air gap that slows heat loss, and you can take it down in spring. Heavy curtains, lined with thermal fabric, add another layer. Draw them at dusk and tuck them behind radiators where possible.

Doors are just as important. A mews house often has a stable door or a wide coach door that looks wonderful but leaks air. Fit a brush draught excluder to the bottom, and use a letterbox flap with a brush seal. For period doors, a traditional ‘snake’ draught excluder — a fabric tube filled with rice or sand — is both useful and charming. Don’t forget keyholes and cat flaps. Finally, a chimney balloon in an unused flue stops warm air vanishing up the chimney, but remove it if you ever light a fire.

Insulating Lofts and Other Tight Spots

Insulating a mews loft is rarely straightforward, but where there is a void above the top floor, it is worth doing properly. If you have a cold roof space with joists, lay mineral wool or a breathable alternative such as sheep’s wool or wood fibre between the joists, then cross-lay a second layer. Aim for at least 270mm in total, but keep the eaves clear for ventilation. If your roof is pitched and you see rafters, you may need rigid insulation boards between them — a job for a specialist, because you must maintain an air gap. In a converted loft room, insulate the walls and ceiling with breathable materials, not foil-backed products that trap moisture. Underfloor insulation is another option if you have a suspended timber floor, but lifting old boards can be disruptive. Radiator reflector panels behind radiators on solid walls are a simple, cheap win.

Cottage Gardening as a Windbreak and Insulator

Here is where your cottage garden earns its keep. A mews often sits in an exposed spot, with wind funnelling down the cobbles. A well-planted boundary can cut that wind and reduce heat loss through walls. Evergreen shrubs such as holly, yew or bay make excellent windbreaks — plant them in a double row if space allows, but keep them at least a metre from the house to avoid damp brickwork. Climbing plants like ivy or pyracantha, trained against a wall, create a still layer of air that acts as extra insulation. On a smaller scale, use window boxes and pots to break the wind at ground level. Cottage gardening is not just about pretty flowers; it is about creating a sheltered microclimate. Even a simple trellis with a climbing rose will help. Just remember: never plant anything that will grow into gutters or block air bricks.

Getting Expert Advice Before You Alter Anything

This is the most important rule. Old mews houses are often in conservation areas or are listed buildings, and altering windows, doors, or external walls without consent can land you in trouble. More practically, well-meant changes can cause serious damage. Fitting cement render to a solid brick wall, for example, traps moisture and leads to spalling. Replacing breathable lime mortar with hard cement is a classic mistake. Before you insulate a loft, change a window, or attach anything to the exterior, speak to your local conservation officer or a surveyor who specialises in historic buildings. They can advise on breathable materials, ventilation, and what is permitted. If you are a tenant, always ask your landlord first. A short conversation now saves a costly repair later.

A Gentle, Practical Plan

You do not need to overhaul everything at once. Start with draught-proofing — it costs little and gives immediate comfort. Then add thermal curtains and a chimney balloon. If you have a loft, insulate it with breathable materials, but get advice on ventilation. Turn to the garden for a windbreak, and let cottage planting do some of the work. Finally, when you are ready to tackle windows, walls, or roofs, call in the experts. A warm mews house is not about sealing it up like a plastic box; it is about working with the building’s character, layer by layer. Do that, and you can enjoy the charm of old stables without the chill.