Dormer, hip-to-gable and mansard loft conversion drawings for Wandsworth homes — prepared to Wandsworth Council's design guidance, delivered in days and revised free until your decision lands, with a free approval-odds score first.
Wandsworth Council granted 88% of the householder planning decisions it made in its latest published year — 1 point above the 87% England-wide householder average. Side returns, mansards and dormers are judged in centimetres against the party wall and shared roofline, which is where a policy-literate drawing pack earns its keep. Its dominant Victorian (1837–1901) and Edwardian (1901–1910) housing stock sets the design brief on most streets.
Before permission is required, Class B allows 40m³ of added loft volume on a terrace and 50m³ on a semi or detached house, and Class A allows a 3m single-storey rear extension on a terrace or 4m on a detached house. Wandsworth carries at least one Article 4 direction, and conservation areas including Wandsworth Common, Nightingale Triangle and Tonsleys remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Wandsworth is determined against an 8-week statutory target.
Battersea (Victorian terraces and mansion flats near the park), Balham (Edwardian terraces around the Nightingale Triangle), Tooting (long Victorian terraces off the high road), Putney (Edwardian villas and riverside streets), Earlsfield (compact Victorian terraces between the commons) and Southfields (the Magdalen Park grid of Edwardian houses) — these are the Wandsworth pockets our drawings cover most. Heritage designations here include Wandsworth Common, Nightingale Triangle, Tonsleys, Magdalen Park and Battersea Park. Wandsworth Council weighs each proposal against Wandsworth Local Plan and the borough's Housing and Basements SPDs, where the borough applies detailed basement-development policies on top of the usual tests. Much of Battersea and Balham is converted flats and maisonettes, which carry no householder permitted-development rights.. On roofs the borough is butterfly / valley roofs on the terraces and pitched roofs on the villas, over Victorian terraces, Edwardian mansion flats and Putney and Wandsworth villas.
Wandsworth's roofs set the brief. The borough is built largely from Victorian terraces, Edwardian mansion flats and Putney and Wandsworth villas, and its lofts sit under butterfly / valley roofs on the terraces and pitched roofs on the villas — the geometry that decides whether a rear dormer, a hip-to-gable or a mansard gives you the headroom you want. Wandsworth Council assesses loft proposals against Wandsworth Local Plan and the borough's Housing and Basements SPDs, and its case officers read each roof against the pair next door and the wider street before they read the plans.
That makes drawing quality decisive. We measure ridge and eaves heights, roof pitch and the existing stair, calculate the added volume against the permitted-development limits exactly, and show the workings on the drawings so Wandsworth Council can verify them. Side returns, mansards and dormers are judged in centimetres against the party wall and shared roofline, so we resolve it on the page rather than leave it for the case officer to raise.
Wandsworth also carries protected streets — Wandsworth Common, Nightingale Triangle, Tonsleys, Magdalen Park and Battersea Park among them. Several Wandsworth conservation areas carry Article 4 directions, and the borough's dense conservation coverage means many terraced streets need a full application for works that would be PD elsewhere. We check your address against those designations before a line is drawn.
Many Wandsworth loft conversions proceed without planning permission — a rear dormer within the permitted-development volume limits (40 cubic metres on a terrace, 50 on a semi or detached house) is usually lawful. You will normally need a full application to Wandsworth Council if any of these apply:
We draw the roof line, the ridge height and the neighbour's daylight on the page — the relationships Wandsworth Council's officers check first — and submit a validation-complete pack, whether that is a lawful development certificate or a full householder application.
Below is Wandsworth Council's real householder decision record, pulled from official planning statistics and updated as new data lands. Wandsworth grants a healthy share of householder applications, but its uniform Victorian terraces mean side returns and roof alterations are assessed in centimetres against the neighbours. Professionally prepared loft drawings anticipate those pressure points before submission, which is why complete, policy-literate packs are decided faster and refused less often than DIY applications.
Source: MHCLG planning application statistics (householder decisions, rolling year). Compare every borough on our London approval-rate league table.
Tell us about your project and get a fixed, no-obligation quote back within one working day. If you don't need planning permission at all, we'll tell you that too — for free.
Across Battersea, Balham and Tooting, the recurring loft is the rear dormer — a box across the back roof slope that turns a cramped attic into a full-height double bedroom and en-suite. On butterfly / valley roofs on the terraces, that is usually the most efficient use of the roof; where the stock is pitched roofs on the villas, a hip-to-gable followed by a rear dormer unlocks far more space, though it needs a full application.
The borough applies detailed basement-development policies on top of the usual tests. We draw the dormer inside the volume allowance, keep the flat-roof build-up below the ridge, and set the face back from the eaves as the rules require — so the pack answers Wandsworth Council's questions before they are asked. Where permitted-development rights are exhausted or removed, we prepare a householder application composed to the borough's roof-alteration guidance instead.
We draw loft conversions on every street in the borough. A few of the neighbourhoods where Wandsworth roofs come up most often:
Loft conversion drawings for Battersea's Victorian terraces and mansion flats near the park — measured, volume-checked and drawn to Wandsworth Council's guidance.
Loft conversion drawings for Balham's Edwardian terraces around the Nightingale Triangle — measured, volume-checked and drawn to Wandsworth Council's guidance.
Loft conversion drawings for Tooting's long Victorian terraces off the high road — measured, volume-checked and drawn to Wandsworth Council's guidance.
Loft conversion drawings for Putney's Edwardian villas and riverside streets — measured, volume-checked and drawn to Wandsworth Council's guidance.
Loft conversion drawings for Earlsfield's compact Victorian terraces between the commons — measured, volume-checked and drawn to Wandsworth Council's guidance.
Loft conversion drawings for Southfields's the Magdalen Park grid of Edwardian houses — measured, volume-checked and drawn to Wandsworth Council's guidance.
The right loft in Wandsworth depends on your roof. This is how the main types compare on planning route and the space they add.
| Loft type | Permitted development? | Space & headroom | What Wandsworth Council checks |
|---|---|---|---|
| Rear dormer | Usually yes, within volume limits | Full-height double room at the back | Volume, set-back from eaves, ridge height |
| Hip-to-gable | No — full application | Extends the whole side of the roof | Roof bulk and the symmetry of the pair |
| Mansard | No — full application | Maximum floor area across the roof | Street character, especially in conservation areas |
| Rooflights only | Usually yes (Class C) | Light and headroom, no extra footprint | Whether rooflights sit within the existing slope |
Route depends on your street — conservation areas such as Wandsworth Common and Nightingale Triangle and Article 4 directions can remove permitted-development rights.
A fixed process built around how Wandsworth Council validates and decides householder loft applications — most drawings are submission-ready within seven days of survey.
Tell us your Wandsworth postcode and roof type. We confirm your conservation and Article 4 status, how much permitted-development volume you have left, and score your odds against live Wandsworth Council decisions.
We measure ridge and eaves heights, roof pitch, joist levels and the existing stair — the numbers the volume calculation and head heights depend on.
Chartered designers develop the dormer, hip-to-gable or mansard to your brief, drawn inside the Class B limits or to Wandsworth Council's roof-alteration guidance.
We submit the certificate or application, manage validation and case-officer queries, and revise the drawings free until Wandsworth Council issues its decision.
Often not. A rear dormer within 40 cubic metres on a terrace, or 50 on a semi-detached or detached house, set back from the eaves and no higher than the ridge, is usually permitted development. In Wandsworth the main exceptions are hip-to-gable conversions, dormers visible from the highway, and homes in conservation areas such as Wandsworth Common and Nightingale Triangle or on streets with an Article 4 direction. Wandsworth Council is the decision-maker.
Generally no. In conservation areas including Wandsworth Common and Nightingale Triangle, Class B permitted-development rights for lofts are removed, so a rear dormer that would be lawful elsewhere needs a full application to Wandsworth Council. Several Wandsworth conservation areas carry Article 4 directions, and the borough's dense conservation coverage means many terraced streets need a full application for works that would be PD elsewhere. We check your exact address before drawing.
On butterfly / valley roofs on the terraces, common across Wandsworth, a rear dormer is usually the most efficient conversion and often permitted development. Where the roof is pitched roofs on the villas, a hip-to-gable followed by a rear dormer gains far more usable space but needs planning permission. Our survey confirms which your roof supports before we draw. Wandsworth Council is the decision-maker.
A householder planning application in Wandsworth runs to a statutory eight-week target, and a lawful development certificate to eight weeks as well, though validation can add time if the pack is incomplete. We submit validation-complete drawings and manage case-officer queries to keep the decision on track. Wandsworth Council is the decision-maker.
If your dormer is permitted development, a lawful development certificate from Wandsworth Council is council-stamped proof of that — worth having, because every buyer's solicitor will ask for it when you sell. We prepare and submit the certificate application with the same drawing pack.
Every roof is different, so we quote each Wandsworth project individually — a fixed, no-obligation price back within one working day. The quote covers the full drawing pack with free revisions until Wandsworth Council approves, and we tell you upfront whether your loft qualifies as permitted development. Call 020 7864 7245 to start.
Answer five quick questions and get a free planning score for your exact address — instantly. Then, if you want the full picture, unlock the detailed analysis: your council's live approval rates, local precedents, constraints on your street and a step-by-step route to permission.
Same fixed quotes, same fast drawings — wherever your project is.