Rear dormer drawings for Kemp Town roofs — the box across the back slope that turns a low attic into a full-height room, drawn to Brighton & Hove City Council's guidance and the volume limits, delivered in days and revised free until your decision, with a free approval-odds check first.
Brighton & Hove City Council granted 89% of the householder planning decisions it made in its latest published year — 2 points above the 87% England-wide householder average. The Kemp Town estate holds one of the densest concentrations of Grade I and Grade II* listing in the city, so alterations are assessed against the original architectural set piece, which is where a policy-literate drawing pack earns its keep. Its dominant Georgian (1714–1837) and Victorian (1837–1901) 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. Kemp Town carries at least one Article 4 direction, and conservation areas including Kemp Town, East Cliff and Queen's Park remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Kemp Town is determined against an 8-week statutory target.
Kemp Town estate (Busby and Wilds' 1820s set piece of Sussex Square and Lewes Crescent), East Cliff (bow-fronted Regency terraces stepping up from Marine Parade), Queen's Park (Victorian terraces and villas around the park bowl), College (planned Victorian streets near Brighton College), Kemptown Village (the compact St George's Road high-street terraces) and Whitehawk fringe (later housing climbing the eastern downland slope) — these are the Kemp Town pockets our drawings cover most. Heritage designations here include Kemp Town, East Cliff, Queen's Park and College. Brighton & Hove City Council weighs each proposal against Brighton & Hove City Plan (Parts One 2016 and Two 2022) and the relevant SPDs, where basement, lightwell and seafront-frontage proposals meet detailed structural and heritage tests before the usual householder considerations. Large tracts of the Regency terraces are long since converted into flats and maisonettes, which hold no householder permitted-development rights.. On roofs the borough is parapet-hidden flat and shallow leaded roofs on the Regency estate, butterfly roofs behind the terrace fronts and pitched slate roofs on the Victorian streets, over Grade I and Grade II* Regency stucco terraces, bow-fronted seafront houses, Victorian bay-fronted terraces and converted flats and maisonettes.
The box dormer is the workhorse loft, and most of Kemp Town is built for it — the borough runs to Grade I and Grade II* Regency stucco terraces, bow-fronted seafront houses, Victorian bay-fronted terraces and converted flats and maisonettes under parapet-hidden flat and shallow leaded roofs on the Regency estate, butterfly roofs behind the terrace fronts and pitched slate roofs on the Victorian streets, and a flat-roofed box across the rear slope is the cheapest cubic metre of full-height space those roofs give up. Brighton & Hove City Council tests the dormer against Brighton & Hove City Plan (Parts One 2016 and Two 2022) and the relevant SPDs, 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. The Kemp Town estate holds one of the densest concentrations of Grade I and Grade II* listing in the city, so alterations are assessed against the original architectural set piece, so the cheeks, the window line and the material are drawn to answer it rather than invite a query.
Where Kemp Town's streets are protected — Kemp Town, East Cliff, Queen's Park and College among them — the Class B dormer right is switched off and even a modest rear box needs consent. Kemp Town falls under the city-wide Article 4 direction removing permitted-development rights for small HMOs, and the Kemp Town and East Cliff conservation-area controls pull most external alterations to the listed Regency terraces into the application system. We confirm the designation before the box is sized.
Many rear dormers in Kemp Town are permitted development, but the volume and position decide it. You will normally need a full application to Brighton & Hove City 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 Brighton & Hove City Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. The council approves most householder schemes across the city, yet in Kemp Town the concentration of high-grade listed terraces means heritage impact, not principle, decides how far a project can go. 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 Kemp Town estate, East Cliff and Queen's Park, 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 parapet-hidden flat and shallow leaded roofs on the Regency estate, this returns a full-height double and en-suite from what was standing-room-only, usually inside the permitted-development volume.
Basement, lightwell and seafront-frontage proposals meet detailed structural and heritage tests before the usual householder considerations. 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 Brighton & Hove City 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 Kemp Town dormers come up most often:
Dormer loft drawings for Kemp Town estate's Busby and Wilds' 1820s set piece of Sussex Square and Lewes Crescent — volume-checked, set-back-detailed and drawn to Brighton & Hove City Council's guidance.
Dormer loft drawings for East Cliff's bow-fronted Regency terraces stepping up from Marine Parade — volume-checked, set-back-detailed and drawn to Brighton & Hove City Council's guidance.
Dormer loft drawings for Queen's Park's Victorian terraces and villas around the park bowl — volume-checked, set-back-detailed and drawn to Brighton & Hove City Council's guidance.
Dormer loft drawings for College's planned Victorian streets near Brighton College — volume-checked, set-back-detailed and drawn to Brighton & Hove City Council's guidance.
Dormer loft drawings for Kemptown Village's the compact St George's Road high-street terraces — volume-checked, set-back-detailed and drawn to Brighton & Hove City Council's guidance.
Dormer loft drawings for Whitehawk fringe's later housing climbing the eastern downland slope — volume-checked, set-back-detailed and drawn to Brighton & Hove City Council's guidance.
Whether a dormer in Kemp Town 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 Brighton & Hove City 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 Kemp Town and East Cliff, Class B dormer rights are removed and every dormer needs a full application.
A fixed process built around how Brighton & Hove City Council validates and decides dormer applications — most drawings are submission-ready within seven days of survey.
Send us your Kemp Town 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 Brighton & Hove City 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 Brighton & Hove City Council's roof-alteration guidance.
We submit the certificate or application, manage validation and case-officer queries, and revise the drawings free until Brighton & Hove City 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 Kemp Town you will need a full application to Brighton & Hove City Council for a front or side dormer, a box that exceeds the volume, and any dormer in a conservation area such as Kemp Town and East Cliff, 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 Kemp Town 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. Brighton & Hove City 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 Brighton & Hove City 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 Kemp Town 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 Brighton & Hove City 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. This applies to your Kemp Town address specifically.
If your dormer is permitted development, a lawful development certificate from Brighton & Hove City 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. This applies to your Kemp Town address specifically.
We price each Kemp Town 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 Brighton & Hove City Council approves, and we confirm at the outset whether your box is permitted development or needs an application. Call 020 7864 7245 to start.
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