Dormer, hip-to-gable and mansard loft conversion drawings for Mole Valley homes — prepared to Mole Valley District Council's design guidance, delivered in days and revised free until your decision lands, with a free approval-odds score first.
Mole Valley District Council granted 83% of the householder planning decisions it made in its latest published year — 4 points below the 87% England-wide householder average. Metropolitan Green Belt covers the bulk of the district and the adopted plan releases well under one per cent of it, so countryside development is tightly controlled, which is where a policy-literate drawing pack earns its keep. Its dominant Victorian (1837–1901), Edwardian (1901–1910), interwar (1918–1939) and postwar (1945–1970) housing stock sets the design brief on most streets.
The permitted-development ceilings are fixed: 40m³ of new roof volume for a terraced loft and 50m³ for a semi or detached house under Class B, plus a 3m single-storey rear extension on a terrace or 4m on a detached house under Class A. Mole Valley carries at least one Article 4 direction, and conservation areas including Dorking, Leatherhead and Brockham remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Mole Valley is determined against an 8-week statutory target.
Dorking (a historic market town with a Victorian and Edwardian core, a conservation area and an Article 4 direction), Leatherhead (a market town of mixed period and postwar housing with a conservation area and an Article 4 direction), Great Bookham (an affluent commuter village with its own conservation-area character), Fetcham (largely interwar and postwar suburban semis and detached houses near Leatherhead), Brockham (a green-belt village around a classic green with a conservation area and an Article 4 direction) and Westhumble (a small Surrey Hills village of detached rural stock below Box Hill) — these are the Mole Valley pockets our drawings cover most. Heritage designations here include Dorking, Leatherhead, Brockham, Great Bookham and Little Bookham. Mole Valley District Council weighs each proposal against the Mole Valley Local Plan 2020–2039 (adopted October 2024), where the Surrey Hills National Landscape (AONB) covers much of the south and west around Dorking and Box Hill, where landscape scrutiny is heightened. Converted flats appear around Dorking and Leatherhead town centres, and none of them hold householder permitted-development rights.. On roofs the borough is dual-pitch tiled roofs on the town villas and terraces and hipped roofs on the interwar suburban semis, over Victorian and Edwardian terraces and villas in the market towns of Dorking and Leatherhead, interwar and postwar suburban semis and detached houses around the towns, substantial detached housing and period cottages in the green-belt and Surrey Hills villages and larger rural country properties to the south and west.
Mole Valley's roofs set the brief. The borough is built largely from Victorian and Edwardian terraces and villas in the market towns of Dorking and Leatherhead, interwar and postwar suburban semis and detached houses around the towns, substantial detached housing and period cottages in the green-belt and Surrey Hills villages and larger rural country properties to the south and west, and its lofts sit under dual-pitch tiled roofs on the town villas and terraces and hipped roofs on the interwar suburban semis — the geometry that decides whether a rear dormer, a hip-to-gable or a mansard gives you the headroom you want. Mole Valley District Council assesses loft proposals against the Mole Valley Local Plan 2020–2039 (adopted October 2024), 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 Mole Valley District Council can verify them. Metropolitan Green Belt covers the bulk of the district and the adopted plan releases well under one per cent of it, so countryside development is tightly controlled, so we resolve it on the page rather than leave it for the case officer to raise.
Mole Valley also carries protected streets — Dorking, Leatherhead, Brockham, Great Bookham and Little Bookham among them. Mole Valley has Article 4 directions removing permitted-development rights in the Dorking, Leatherhead and Brockham conservation areas, so that features contributing to their character cannot be altered without consent. We check your address against those designations before a line is drawn.
Many Mole Valley 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 Mole Valley District Council if any of these apply:
We draw the roof line, the ridge height and the neighbour's daylight on the page — the relationships Mole Valley District 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 Mole Valley District Council's real householder decision record, pulled from official planning statistics and updated as new data lands. Mole Valley grants a lower share of applications than the national average, with near-total Green Belt coverage and the Surrey Hills AONB the constraints behind most refusals of larger schemes. 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, England, 1 April 2025 - 31 March 2026). 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 Dorking, Leatherhead and Great Bookham, 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 dual-pitch tiled roofs on the town villas and terraces, that is usually the most efficient use of the roof; where the stock is hipped roofs on the interwar suburban semis, a hip-to-gable followed by a rear dormer unlocks far more space, though it needs a full application.
The Surrey Hills National Landscape (AONB) covers much of the south and west around Dorking and Box Hill, where landscape scrutiny is heightened. 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 Mole Valley District 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 Mole Valley roofs come up most often:
Loft conversion drawings for Dorking's a historic market town with a Victorian and Edwardian core, a conservation area and an Article 4 direction — measured, volume-checked and drawn to Mole Valley District Council's guidance.
Loft conversion drawings for Leatherhead's a market town of mixed period and postwar housing with a conservation area and an Article 4 direction — measured, volume-checked and drawn to Mole Valley District Council's guidance.
Loft conversion drawings for Great Bookham's an affluent commuter village with its own conservation-area character — measured, volume-checked and drawn to Mole Valley District Council's guidance.
Loft conversion drawings for Fetcham's largely interwar and postwar suburban semis and detached houses near Leatherhead — measured, volume-checked and drawn to Mole Valley District Council's guidance.
Loft conversion drawings for Brockham's a green-belt village around a classic green with a conservation area and an Article 4 direction — measured, volume-checked and drawn to Mole Valley District Council's guidance.
Loft conversion drawings for Westhumble's a small Surrey Hills village of detached rural stock below Box Hill — measured, volume-checked and drawn to Mole Valley District Council's guidance.
The right loft in Mole Valley 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 Mole Valley District 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 Dorking and Leatherhead and Article 4 directions can remove permitted-development rights.
A fixed process built around how Mole Valley District Council validates and decides householder loft applications — most drawings are submission-ready within seven days of survey.
Tell us your Mole Valley 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 Mole Valley District 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 Mole Valley District Council's roof-alteration guidance.
We submit the certificate or application, manage validation and case-officer queries, and revise the drawings free until Mole Valley District 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 Mole Valley the main exceptions are hip-to-gable conversions, dormers visible from the highway, and homes in conservation areas such as Dorking and Leatherhead or on streets with an Article 4 direction. Mole Valley District Council is the decision-maker.
Generally no. In conservation areas including Dorking and Leatherhead, Class B permitted-development rights for lofts are removed, so a rear dormer that would be lawful elsewhere needs a full application to Mole Valley District Council. Mole Valley has Article 4 directions removing permitted-development rights in the Dorking, Leatherhead and Brockham conservation areas, so that features contributing to their character cannot be altered without consent. We check your exact address before drawing.
On dual-pitch tiled roofs on the town villas and terraces, common across Mole Valley, a rear dormer is usually the most efficient conversion and often permitted development. Where the roof is hipped roofs on the interwar suburban semis, 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. Mole Valley District Council is the decision-maker.
A householder planning application in Mole Valley 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. Mole Valley District Council is the decision-maker.
If your dormer is permitted development, a lawful development certificate from Mole Valley District 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 Mole Valley project individually — a fixed, no-obligation price back within one working day. The quote covers the full drawing pack with free revisions until Mole Valley District 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.