Areas We Cover

We cover London and the South East — Greater London plus Surrey, Kent, Sussex, Essex, Hertfordshire, Berkshire, Buckinghamshire and Oxfordshire. The work is done from inside the room, so no scaffolding is required and upper floors and flats are no harder than ground floors.

Where we work

Our work is concentrated where the housing stock is: the Georgian, Victorian and Edwardian terraces and villas that still have their original box sashes. That means central and inner London most of all, and the older parts of the commuter towns around it.

London

Most of what we do is in London — north, south, east and west. Typical work is a whole terraced house, six to twelve sashes, done over two or three days, room by room. In conservation areas, which cover a great deal of inner London, draught proofing is usually the most acceptable way of improving an old window precisely because it keeps the window. Do check whether an Article 4 Direction applies to your street before assuming anything about replacement.

The South East

Outside London we cover Surrey, Kent, Sussex, Essex, Hertfordshire, Berkshire, Buckinghamshire and Oxfordshire. Travel is easier to justify on a whole-house job, so if you are at the edge of that area and have several windows, ask.

The properties we mostly work on

Georgian and early Victorian townhouses — often six-over-six or larger, frequently listed, sometimes with Venetian or curved sashes that price differently.
Victorian and Edwardian terraces — the bulk of the work. Usually two-over-two with horns, and usually a whole house at a time.
Period conversions and flats — commonly a handful of sashes, so worth grouping with neighbours if you can.
1920s and 1930s houses — later box sashes and some solid-frame sashes, which have no weight box and are sealed slightly differently.

What makes a job practical

Three things move the price more than distance does.

Number of windows. The dominant factor. Most of the cost is skilled time and set-up, so the second window in a visit is cheaper than the first. See the cost page.
Condition. Rot at the cill or the base of the stiles has to be repaired before sealing — Historic England is explicit that repairs come first, and notes repairs alone can cut air infiltration and heat loss by up to a third.
Access and parking. Sashes are heavy and awkward. A controlled parking zone with no loading bay adds real time to a job.

If you would like a guide price, send the number of sashes and your postcode via the contact page.

Last reviewed: 28 July 2026.

Coverage: common questions

Do you cover my area?

We work across London and the surrounding counties — Surrey, Kent, Sussex, Essex, Hertfordshire, Berkshire, Buckinghamshire and Oxfordshire. If you are just outside that and have a houseful of sashes, it is still worth asking: whole-house jobs travel better than single windows.

Is there a minimum number of windows?

No fixed minimum, but there is a practical one. Almost every sash specialist applies a minimum callout charge — one London firm publishes £500 plus VAT — so a single window costs a disproportionate amount per window. If you can group several, or do a floor or the whole house at once, the price per window drops substantially.

Do you charge for the survey?

Surveys for residential work are normally free and without obligation, and take around 40 to 60 minutes. We will give you a guide price by email before that, so nobody's time is wasted if the budget is not close.

Do you need scaffolding or access from outside?

Not for draught proofing. The work is done in situ from inside the room, which is one of the reasons it is a relatively low-disruption way of improving an old window. External decoration or masonry repairs are separate and may need access equipment.

Can you work on flats and upper floors?

Yes. Because everything is done from inside, upper floors and flats are straightforward. What does affect the price is carrying and parking — sashes are heavy, and a top-floor Victorian conversion with no loading takes longer than a ground-floor terrace.