House extension drawings in Richmond upon Thames

Conservation areas, listed houses and Green Belt

Richmond upon Thames has 85 conservation areas, and Historic England records 819 list entries within the borough boundary. The borough also reports 2 per cent of its area as Green Belt.

The practical effect is a longer checklist at the start. We look up the address for conservation area status, listing, tree protection and any Article 4 direction before we propose a design, because each changes the route and the level of detail the council will want in the drawings.

Permitted development or a planning application

Under the national rules, a single-storey rear extension can be permitted development within these limits: 3 m (attached) / 4 m (detached) beyond the original rear wall, single storey. A larger home extension scheme lets you go further, at 6 m (attached) / 8 m (detached), single storey, height max 4 m; not on article 2(3) land or an SSSI, after a prior approval process in which neighbours are consulted.

In the latest published year Richmond upon Thames granted 78 and refused 30 larger home extension prior approvals, so neighbours' objections and the council's own checks are a live part of that route here. Where permitted development applies, a Lawful Development Certificate can confirm it; where it does not, you need householder planning permission, which our planning drawings in Richmond upon Thames support.

How Richmond has been deciding householder applications

The council decided 1,302 householder applications in its latest published year, granting 83.3 per cent, and decided 98.3 per cent within eight weeks or an agreed extension. Those are borough-wide figures for every kind of householder project. We use them to plan timing with you, not to predict how any one house will fare.

What the drawings include and what they cost

A Richmond extension set shows existing and proposed floor plans, all elevations, a section through the new work and the location and block plans. Prices start at £695 with VAT included, fixed before you commit. A second chartered technologist checks every sheet before it is submitted, and if the council asks for changes we redraw them at no charge until approval.

When the design is settled, the same drawings feed the structure and thermal detail. New elements in an existing house must meet Approved Document L, with limiting figures such as: New elements in existing dwellings, limiting U-values W/(m²·K): roof 0.15, wall 0.18, floor 0.18, windows 1.4 (or WER Band B), doors 1.4. Our building regulations drawings in Richmond upon Thames carry that detail through.

Extension types and neighbouring councils

If your plan is one particular shape, see rear extension drawings in Richmond upon Thames, the double-storey extension drawings or the side return extension drawings. For the whole borough, start at architectural drawings in Richmond upon Thames. Next door, compare house extension drawings in Kingston upon Thames and in Hounslow.