Wraparound extension drawings in Wandsworth

Conservation areas, listed streets and the permitted development route

Wandsworth has 46 conservation areas, and a wraparound is the extension type that suffers most inside them. The national rule is plain: On article 2(3) land (conservation areas etc.): no side extensions, no cladding, no rear extension of more than one storey under Class A. Because a wraparound contains a side element by definition, it cannot be built under permitted development in a conservation area, so a planning application is the route.

Listed property adds a second layer. Historic England records 312 list entries in the borough, of which 5 are Grade I. A listed house, or one that shares a party wall with a listed neighbour, needs its own consent for most changes, and that is a different conversation from the one on this page.

Outside those areas the permitted development limits still apply to the combined enlargement: Limits apply to the total enlargement (new part plus any existing enlargement it joins). We test the total on the model before suggesting a route, and where it fails we move straight to a householder application drawn as a set of planning drawings.

Who builds wraparounds here: houses are the minority

Only 31.4 per cent of Wandsworth households live in a house or bungalow, so a wraparound belongs to a particular kind of street. The average terraced house sold for £970,844 in the latest figures and a semi-detached one for £1,345,411, which is why owners here tend to extend rather than move.

We treat that as context and make no promise from it. Nothing in the price data tells you what an extension adds to your own house, and we do not guess at it. What it does tell us is that the drawings need to be careful: a mistake on a house at this value is expensive to put right on site.

How Wandsworth has been deciding householder applications

In its latest published year the council decided 977 householder applications, granted 91.9 per cent and decided 92.4 per cent inside eight weeks or an agreed extension. Those figures cover every householder project from dormers to porches, so they describe the council's pace and temper, not the chance of any one scheme.

There is a second route for the rear arm alone. The larger home extension prior approval covers a single-storey rear extension beyond the usual depth, and the borough decided 13 in favour and 12 against in the latest quarterly returns. That near-even split is a reminder that neighbour objections carry weight, and that a wraparound with a deep rear arm needs a careful look at the adjoining windows before you notify.

What we measure and what goes on the sheets

We survey the original house, not the house as it stands today, because earlier conservatories and outriggers use up part of the allowance. The rear limit for a simple extension is 3 m (attached) / 4 m (detached) beyond the original rear wall, single storey, and the side arm is capped by Side extension: single storey, max 4 m high, max half the width of the original house.

Glass needs thought early. The energy guidance expects openings to stay within a share of the new floor area: Windows, roof windows, rooflights and doors in an extension should not exceed 25% of the extension floor area plus the area of openings removed or covered. A kitchen that wraps two sides of a garden can reach the cap without trying, so the elevations are drawn with that sum beside them.

A wraparound touches at least two boundaries, and the party wall rules follow: Line-of-junction (new wall) notice at least 1 month before work. We prepare the drawings for the notices and suggest you speak to both neighbours before the letters arrive.

Price, fees and next steps

Wraparound extension drawings in Wandsworth start at £1,195 including VAT, fixed before you commit. A householder application also carries a council fee of £548, paid to the council, not to us. A second chartered technologist checks every set, and if the council asks for changes we redraw at no charge until approval.

Not sure a wraparound is the right shape? Compare rear extension drawings in Wandsworth or side return extension drawings in Wandsworth, and see the full local picture under architectural drawings in Wandsworth. The general guide is at wraparound extension drawings. Next door, the same service is covered for Lambeth, Merton and Richmond upon Thames.