Dormer, hip-to-gable and mansard loft conversion drawings for Brunswick Town homes — prepared to Brighton & Hove City Council's design guidance, delivered in days and revised free until your decision lands, with a free approval-odds score 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 set-piece Regency squares and their bow-fronted seafront terraces are protected against any alteration that breaks the historic building line, 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. Brunswick Town carries at least one Article 4 direction, and conservation areas including Brunswick Town, Regency Square and Sackville Gardens remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Brunswick Town is determined against an 8-week statutory target.
Brunswick Square (Busby's monumental twin-terrace centrepiece off the seafront), Brunswick Terrace (the long bow-fronted seafront run either side of the square), Regency Square (the 1820s stucco square facing the West Pier site), Adelaide Crescent (the sweeping later-Regency crescent toward Hove), Sackville Gardens (smaller-scale piecemeal Victorian streets to the north-west) and Waterloo Street (the compact Regency lanes linking the estate inland) — these are the Brunswick Town pockets our drawings cover most. Heritage designations here include Brunswick Town, Regency Square and Sackville Gardens. Brighton & Hove City Council weighs each proposal against Brighton & Hove City Plan (Parts One 2016 and Two 2022) and the relevant SPDs, where the density of Grade I and Grade II* listing means external works are judged against the original architectural composition. Almost all of Brunswick Town's terraces are now flats and maisonettes, which hold no householder permitted-development rights of their own.. On roofs the borough is parapet-hidden flat and leaded roofs on the Regency terraces and shallow slated roofs behind the cornice lines, over Grade I and Grade II* Regency stucco terraces and squares, bow-fronted seafront houses and converted flats and maisonettes.
Brunswick Town's roofs set the brief. The borough is built largely from Grade I and Grade II* Regency stucco terraces and squares, bow-fronted seafront houses and converted flats and maisonettes, and its lofts sit under parapet-hidden flat and leaded roofs on the Regency terraces and shallow slated roofs behind the cornice lines — the geometry that decides whether a rear dormer, a hip-to-gable or a mansard gives you the headroom you want. Brighton & Hove City Council assesses loft proposals against Brighton & Hove City Plan (Parts One 2016 and Two 2022) and the relevant 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 Brighton & Hove City Council can verify them. The set-piece Regency squares and their bow-fronted seafront terraces are protected against any alteration that breaks the historic building line, so we resolve it on the page rather than leave it for the case officer to raise.
Brunswick Town also carries protected streets — Brunswick Town, Regency Square and Sackville Gardens among them. Brunswick Town is covered by the city-wide small-HMO Article 4 direction and by a conservation-area Article 4 that removes permitted-development rights on its Regency terraces, so even minor external changes to the stucco frontages require consent. We check your address against those designations before a line is drawn.
Many Brunswick Town 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 Brighton & Hove City Council if any of these apply:
We draw the roof line, the ridge height and the neighbour's daylight on the page — the relationships Brighton & Hove City 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 Brighton & Hove City Council's real householder decision record, pulled from official planning statistics and updated as new data lands. The council approves most householder applications city-wide, but in Brunswick Town the concentration of high-grade listed Regency stock means heritage impact governs what any scheme can achieve. 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 Brunswick Square, Brunswick Terrace and Regency Square, 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 parapet-hidden flat and leaded roofs on the Regency terraces, that is usually the most efficient use of the roof; where the stock is shallow slated roofs behind the cornice lines, a hip-to-gable followed by a rear dormer unlocks far more space, though it needs a full application.
The density of Grade I and Grade II* listing means external works are judged against the original architectural composition. 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 Brighton & Hove City 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 Brunswick Town roofs come up most often:
Loft conversion drawings for Brunswick Square's Busby's monumental twin-terrace centrepiece off the seafront — measured, volume-checked and drawn to Brighton & Hove City Council's guidance.
Loft conversion drawings for Brunswick Terrace's the long bow-fronted seafront run either side of the square — measured, volume-checked and drawn to Brighton & Hove City Council's guidance.
Loft conversion drawings for Regency Square's the 1820s stucco square facing the West Pier site — measured, volume-checked and drawn to Brighton & Hove City Council's guidance.
Loft conversion drawings for Adelaide Crescent's the sweeping later-Regency crescent toward Hove — measured, volume-checked and drawn to Brighton & Hove City Council's guidance.
Loft conversion drawings for Sackville Gardens's smaller-scale piecemeal Victorian streets to the north-west — measured, volume-checked and drawn to Brighton & Hove City Council's guidance.
Loft conversion drawings for Waterloo Street's the compact Regency lanes linking the estate inland — measured, volume-checked and drawn to Brighton & Hove City Council's guidance.
The right loft in Brunswick Town 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 Brighton & Hove City 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 Brunswick Town and Regency Square and Article 4 directions can remove permitted-development rights.
A fixed process built around how Brighton & Hove City Council validates and decides householder loft applications — most drawings are submission-ready within seven days of survey.
Tell us your Brunswick Town 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 Brighton & Hove City 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 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 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 Brunswick Town the main exceptions are hip-to-gable conversions, dormers visible from the highway, and homes in conservation areas such as Brunswick Town and Regency Square or on streets with an Article 4 direction. Brighton & Hove City Council is the decision-maker.
Generally no. In conservation areas including Brunswick Town and Regency Square, Class B permitted-development rights for lofts are removed, so a rear dormer that would be lawful elsewhere needs a full application to Brighton & Hove City Council. Brunswick Town is covered by the city-wide small-HMO Article 4 direction and by a conservation-area Article 4 that removes permitted-development rights on its Regency terraces, so even minor external changes to the stucco frontages require consent. We check your exact address before drawing.
On parapet-hidden flat and leaded roofs on the Regency terraces, common across Brunswick Town, a rear dormer is usually the most efficient conversion and often permitted development. Where the roof is shallow slated roofs behind the cornice lines, 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. Brighton & Hove City Council is the decision-maker.
A householder planning application in Brunswick Town 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. Brighton & Hove City Council is the decision-maker.
If your dormer is permitted development, a lawful development certificate from Brighton & Hove City 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. This applies to your Brunswick Town address specifically.
Every roof is different, so we quote each Brunswick Town project individually — a fixed, no-obligation price back within one working day. The quote covers the full drawing pack with free revisions until Brighton & Hove City 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.