Rear dormer drawings for Tandridge roofs — the box across the back slope that turns a low attic into a full-height room, drawn to Tandridge District Council's guidance and the volume limits, delivered in days and revised free until your decision, with a free approval-odds check first.
Tandridge District Council granted 87% of the householder planning decisions it made in its latest published year — level with the 87% England-wide householder average. Metropolitan Green Belt covers around 94% of the district, one of the highest proportions in England, so the presumption against inappropriate development dominates decisions, 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.
Under Class B, a rear dormer stays permitted development up to 40m³ of added roof volume on a terrace or 50m³ on a semi-detached or detached house, while Class A allows a single-storey rear extension of 3m beyond the original rear wall on a terrace and 4m on a detached house before a full application is needed. Tandridge carries at least one Article 4 direction, and conservation areas including Oxted, Limpsfield and Godstone remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Tandridge is determined against an 8-week statutory target.
Oxted (the principal town with railway-era Victorian and Edwardian housing, twentieth-century growth and a conservation area), Caterham (the district's largest settlement, dense Victorian-to-postwar housing across Caterham-on-the-Hill and the Valley), Warlingham (a hilltop commuter village of largely interwar and postwar detached houses and semis), Godstone (a historic green-belt village around a pond and green with a conservation area), Limpsfield (an affluent AONB-edge village of period and large detached stock with a conservation area) and Lingfield (a historic rural village with a medieval core and a conservation area) — these are the Tandridge pockets our drawings cover most. Heritage designations here include Oxted, Limpsfield, Godstone, Bletchingley, Lingfield and Chaldon. Tandridge District Council weighs each proposal against the Tandridge District Core Strategy (adopted 2008) and Local Plan Part 2: Detailed Policies (adopted July 2014), where the Surrey Hills and High Weald National Landscapes (AONBs) affect the district around Limpsfield, Oxted and the south, adding national landscape protection. Converted flats appear around Oxted and Caterham, and none of them hold householder permitted-development rights.. On roofs the borough is dual-pitch tiled roofs on the railway-era terraces and villas and hipped roofs on the interwar and postwar semis, over Victorian and Edwardian and interwar railway-era housing in Oxted and Caterham, postwar suburban semis and detached houses, large detached houses on generous plots at Woldingham and Limpsfield and historic vernacular cottages in the green-belt villages of Godstone, Bletchingley and Lingfield.
The box dormer is the workhorse loft, and most of Tandridge is built for it — the borough runs to Victorian and Edwardian and interwar railway-era housing in Oxted and Caterham, postwar suburban semis and detached houses, large detached houses on generous plots at Woldingham and Limpsfield and historic vernacular cottages in the green-belt villages of Godstone, Bletchingley and Lingfield under dual-pitch tiled roofs on the railway-era terraces and villas and hipped roofs on the interwar and postwar semis, and a flat-roofed box across the rear slope is the cheapest cubic metre of full-height space those roofs give up. Tandridge District Council tests the dormer against the Tandridge District Core Strategy (adopted 2008) and Local Plan Part 2: Detailed Policies (adopted July 2014), and because permitted development turns on a number, the volume you propose against the volume you have left is the first thing an officer or a certificate checks.
That is why the arithmetic goes on the drawings. We calculate the box against the 40- or 50-cubic-metre allowance, count any earlier roof enlargement into the total, hold the flat roof below the ridge and set the face back off the eaves so the dormer reads as subordinate. Metropolitan Green Belt covers around 94% of the district, one of the highest proportions in England, so the presumption against inappropriate development dominates decisions, so the cheeks, the window line and the material are drawn to answer it rather than invite a query.
Where Tandridge's streets are protected — Oxted, Limpsfield, Godstone, Bletchingley, Lingfield and Chaldon among them — the Class B dormer right is switched off and even a modest rear box needs consent. Tandridge has Article 4 directions removing permitted-development rights in parts of the district, which owners can check against the council's constraints map before assuming suburban PD rights, and its conservation areas such as Oxted, Limpsfield and Godstone add further character controls. We confirm the designation before the box is sized.
Many rear dormers in Tandridge are permitted development, but the volume and position decide it. You will normally need a full application to Tandridge District Council if any of these apply:
We draw the box within its volume allowance, the flat roof below the ridge and the face set back off the eaves — the three things a dormer stands or falls on — and submit a validation-complete pack, whether that is a lawful development certificate or a full householder application.
Below is Tandridge District Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Tandridge grants a fair share of applications broadly in line with the national picture, with overwhelming Green Belt coverage and AONB protection the pressures on anything beyond modest householder work. A dormer is decided on volume and set-back, so a pack that shows the calculation and the eaves detail is cleared faster and refused less often than a DIY submission.
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 Oxted, Caterham and Warlingham, the dormer that goes through is the subordinate rear box: flat roof kept low, cheeks clad to recede, side windows obscure-glazed against overlooking, and the whole thing set back so the original eaves line still reads from the garden. On dual-pitch tiled roofs on the railway-era terraces and villas, this returns a full-height double and en-suite from what was standing-room-only, usually inside the permitted-development volume.
The Surrey Hills and High Weald National Landscapes (AONBs) affect the district around Limpsfield, Oxted and the south, adding national landscape protection. We keep the box off the ridge, match the cheek material to the roof, and where the volume is already spent — or the street is designated — draw the dormer as a householder application composed to Tandridge District Council's roof-alteration guidance rather than push a certificate that would be refused.
We draw rear dormers on the terraced and semi-detached streets across the borough. A few of the neighbourhoods where Tandridge dormers come up most often:
Dormer loft drawings for Oxted's the principal town with railway-era Victorian and Edwardian housing, twentieth-century growth and a conservation area — volume-checked, set-back-detailed and drawn to Tandridge District Council's guidance.
Dormer loft drawings for Caterham's the district's largest settlement, dense Victorian-to-postwar housing across Caterham-on-the-Hill and the Valley — volume-checked, set-back-detailed and drawn to Tandridge District Council's guidance.
Dormer loft drawings for Warlingham's a hilltop commuter village of largely interwar and postwar detached houses and semis — volume-checked, set-back-detailed and drawn to Tandridge District Council's guidance.
Dormer loft drawings for Godstone's a historic green-belt village around a pond and green with a conservation area — volume-checked, set-back-detailed and drawn to Tandridge District Council's guidance.
Dormer loft drawings for Limpsfield's an affluent AONB-edge village of period and large detached stock with a conservation area — volume-checked, set-back-detailed and drawn to Tandridge District Council's guidance.
Dormer loft drawings for Lingfield's a historic rural village with a medieval core and a conservation area — volume-checked, set-back-detailed and drawn to Tandridge District Council's guidance.
Whether a dormer in Tandridge needs permission comes down to where it sits and how big the box is. This is how the cases compare.
| Dormer type | Permitted development? | What it gains | What Tandridge District Council checks |
|---|---|---|---|
| Rear box, within volume | Usually yes | Full-height room across the back | Volume total, 20cm eaves set-back |
| Rear box, over volume limit | No — full application | A larger room | How far over the allowance, bulk |
| Front or side dormer | No — full application | Light to the front rooms | Visibility from the street, character |
| Dormer in a conservation area | No — full application | Same space, extra scrutiny | Roof form and street appearance |
In conservation areas such as Oxted and Limpsfield, Class B dormer rights are removed and every dormer needs a full application.
A fixed process built around how Tandridge District Council validates and decides dormer applications — most drawings are submission-ready within seven days of survey.
Send us your Tandridge postcode and roof type. We confirm your conservation and Article 4 status, work out how much permitted-development volume you have left, and score your odds against live Tandridge District Council decisions.
We measure ridge and eaves heights, roof pitch and the existing loft floor — the numbers the volume calculation, the set-back and the head heights depend on.
Chartered designers develop the box to your brief, drawn inside the Class B volume limits or, where those are exhausted or removed, to Tandridge District Council's roof-alteration guidance.
We submit the certificate or application, manage validation and case-officer queries, and revise the drawings free until Tandridge District Council issues its decision.
Often not. A rear box dormer within 40 cubic metres on a terrace, or 50 on a semi or detached house, set back at least 20 centimetres from the eaves and kept below the ridge, is usually permitted development. In Tandridge you will need a full application to Tandridge District Council for a front or side dormer, a box that exceeds the volume, and any dormer in a conservation area such as Oxted and Limpsfield, where those rights are removed.
The permitted-development limit is a volume, not a footprint: 40 cubic metres of added roof space on a terraced house and 50 on a semi-detached or detached one, and any earlier loft enlargement counts against that total. In Tandridge the box must also sit below the ridge and back from the eaves. We measure your roof and calculate the exact volume you have left before drawing. Tandridge District Council is the decision-maker.
Not under permitted development. A dormer on the front roof slope, or one facing a highway, always needs a full application to Tandridge District Council, because it changes how the house reads from the street. Rear box dormers are far more likely to be approved — or to be permitted development outright — which is why almost every Tandridge dormer we draw sits on the back slope.
Often, on a terrace or semi. If the dormer or the loft steelwork meets the party wall with your neighbour, the Party Wall etc. Act applies and notice must be served before work starts — separately from Tandridge District Council's planning decision. We flag the party-wall junction on the drawings so a surveyor can be appointed early and the build is not held up.
If your dormer is permitted development, a lawful development certificate from Tandridge District Council is council-stamped proof of it — worth holding, because a buyer's solicitor will ask for it when you sell. We prepare and submit the certificate with the same measured drawing pack that shows the box within its volume allowance.
We price each Tandridge dormer individually, because the roof pitch and the volume left vary house to house, and send a fixed, no-obligation quote within one working day. It covers the full drawing pack with free revisions until Tandridge District Council approves, and we confirm at the outset whether your box is permitted development or needs an application. 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.