Dormer, hip-to-gable and mansard loft conversion drawings for East Downs homes — prepared to Swale Borough Council's design guidance, delivered in days and revised free until your decision lands, with a free approval-odds score first.
Swale Borough Council granted 94% of the householder planning decisions it made in its latest published year — 7 points above the 87% England-wide householder average. East Downs contains Badlesmere, Doddington and Newnham, Eastling conservation areas (Badlesmere designated 1982), so materials, fenestration and roof form are assessed against the appraisal, which is where a policy-literate drawing pack earns its keep. Its dominant Victorian (1837–1901), 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. East Downs carries at least one Article 4 direction, and conservation areas including Badlesmere, Doddington and Newnham and Eastling remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in East Downs is determined against an 8-week statutory target.
Badlesmere (conservation area designated in 1982), Doddington and Newnham (conservation area designated in 1973), Eastling (conservation area designated in 1973), Painter's Forstal (conservation area designated in 1992), Stalisfield Green (conservation area designated in 1975), Syndale (conservation area designated in 2008), Throwley Forstal (conservation area designated in 1973), Whitehill (conservation area designated in 1975), Badlesmere (civil parish within East Downs), Doddington (civil parish within East Downs), Eastling (civil parish within East Downs), Leaveland (civil parish within East Downs), Newnham (civil parish within East Downs) and Ospringe (civil parish within East Downs) — these are the East Downs pockets our drawings cover most. Heritage designations here include Badlesmere, Doddington and Newnham, Eastling, Painter's Forstal, Stalisfield Green, Syndale, Throwley Forstal and Whitehill. Swale Borough Council weighs each proposal against the adopted Swale local plan and Swale Borough Council's design guidance for householder work, where the 1,240 homes here are 48% pre-1900, 8% 1945-1954, 7% 1930-1939, which is what sets the realistic roof and rear-projection options. On roofs the borough is steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 building and simple gabled and hipped roofs typical of early postwar building, over Victorian and earlier houses (48% of 1,240 homes), early postwar houses (8%) and 1930s semi-detached and detached houses (7%).
Before anything is drawn we check your address against the designations that apply in East Downs: Badlesmere (conservation area designated in 1982), Doddington and Newnham (conservation area designated in 1973), Eastling (conservation area designated in 1973), Painter's Forstal (conservation area designated in 1992), Stalisfield Green (conservation area designated in 1975), Syndale (conservation area designated in 2008), Throwley Forstal (conservation area designated in 1973) and Whitehill (conservation area designated in 1975). Inside those boundaries permitted development is curtailed and Swale Borough Council assesses materials, window detail and roof form against the area's own appraisal, so a scheme that would be waved through two streets away can need a full application here.
Beyond the designated areas, East Downs takes in Badlesmere, Doddington, Eastling, Leaveland, Newnham and Ospringe. Swale Borough Council has 22 recorded Article 4 directions, removing permitted development for rear and side extensions — check the address before assuming PD applies in East Downs.
On stock, East Downs is Victorian and earlier houses (48% of 1,240 homes), early postwar houses (8%) and 1930s semi-detached and detached houses (7%) — which is why steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 building and simple gabled and hipped roofs typical of early postwar building govern what a loft or rear projection can realistically be. Swale Borough Council decided 329 householder applications in the latest published year and granted 94%, with 37% issued inside the eight-week target. That decision record, not a national figure, is what we design to.
The full build-period split for East Downs runs pre-1900 48% (590 homes), 1900-1918 2% (20 homes), 1919-1929 5% (60 homes), 1930-1939 7% (90 homes), 1945-1954 8% (100 homes), 1955-1964 6% (70 homes), 1965-1972 6% (80 homes), 1973-1982 3% (40 homes), 1983-1992 3% (40 homes), 1993-1999 2% (30 homes) and 2000-2008 2% (30 homes). That distribution is why pre-1900 detailing dominates the drawings here, and it is measured from council-tax records rather than assumed from the street name.
Swale Borough Council also decides for Abbey, Borden and Grove Park, Boughton and Courtenay, Sheerness, Teynham and Lynsted, Watling and West Downs, so a decision in East Downs sits inside a wider pattern of decisions we track across the same authority — useful when an officer cites a precedent from the next area over.
The Article 4 directions recorded for this council include 1 and 2 Flint Cottages, 20 East Street, 43-47, 49-51, 54, 56, 57, 59-72 Marine Parade and 49, 88, 90, 104, 114-128(evens), 132-140(evens) The Street and 1 & 2 Chapel Cottages. Each removes a specific permitted-development right inside its own boundary, which is why the check is done on the address rather than on the town.
Published figures for East Downs and Swale Borough Council. These are the numbers that decide what is realistic on your street, so we work from them rather than from national averages.
| Measure | East Downs |
|---|---|
| Dwellings recorded | 1,240 |
| Built pre-1900 | 590 (48%) |
| Built 1900-1918 | 20 (2%) |
| Built 1919-1929 | 60 (5%) |
| Built 1930-1939 | 90 (7%) |
| Built 1945-1954 | 100 (8%) |
| Built 1955-1964 | 70 (6%) |
| Built 1965-1972 | 80 (6%) |
| Built 1973-1982 | 40 (3%) |
| Built 1983-1992 | 40 (3%) |
| Built 1993-1999 | 30 (2%) |
| Built 2000-2008 | 30 (2%) |
| Built before 1919 | 49% |
| Built 1919–1939 | 12% |
| Built 1945–2008 | 31% |
| Conservation areas in East Downs | 8 (Badlesmere, Doddington and Newnham…) |
| Conservation areas district-wide | 52 |
| Article 4 directions recorded | 22 |
| Householder applications decided | 329 |
| Householder applications granted | 94% |
| Decided within 8 weeks | 37% |
Dwelling stock from VOA council-tax data at 31 March 2025; conservation-area and Article 4 counts from planning.data.gov.uk (MHCLG); decision figures are Swale Borough Council's own, from MHCLG live table PS2 for the year to 31 March 2026.
East Downs's roofs set the brief. The borough is built largely from Victorian and earlier houses (48% of 1,240 homes), early postwar houses (8%) and 1930s semi-detached and detached houses (7%), and its lofts sit under steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 building and simple gabled and hipped roofs typical of early postwar building — the geometry that decides whether a rear dormer, a hip-to-gable or a mansard gives you the headroom you want. Swale Borough Council assesses loft proposals against the adopted Swale local plan and Swale Borough Council's design guidance for householder work, 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 Swale Borough Council can verify them. East Downs contains Badlesmere, Doddington and Newnham, Eastling conservation areas (Badlesmere designated 1982), so materials, fenestration and roof form are assessed against the appraisal, so we resolve it on the page rather than leave it for the case officer to raise.
East Downs also carries protected streets — Badlesmere, Doddington and Newnham, Eastling, Painter's Forstal, Stalisfield Green, Syndale, Throwley Forstal and Whitehill among them. Swale Borough Council has 22 recorded Article 4 directions, removing permitted development for rear and side extensions — check the address before assuming PD applies in East Downs. We check your address against those designations before a line is drawn.
Many East Downs 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 Swale Borough Council if any of these apply:
We draw the roof line, the ridge height and the neighbour's daylight on the page — the relationships Swale Borough 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 Swale Borough Council's real householder decision record, pulled from official planning statistics and updated as new data lands. Swale Borough Council granted 94% of its householder applications in the year to 31 March 2026, and Badlesmere shapes what is approved here. 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 Badlesmere, Doddington and Newnham and Eastling, 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 steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 building, that is usually the most efficient use of the roof; where the stock is simple gabled and hipped roofs typical of early postwar building, a hip-to-gable followed by a rear dormer unlocks far more space, though it needs a full application.
The 1,240 homes here are 48% pre-1900, 8% 1945-1954, 7% 1930-1939, which is what sets the realistic roof and rear-projection options. 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 Swale Borough 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 East Downs roofs come up most often:
Loft conversion drawings for Badlesmere's conservation area designated in 1982 — measured, volume-checked and drawn to Swale Borough Council's guidance.
Loft conversion drawings for Doddington and Newnham's conservation area designated in 1973 — measured, volume-checked and drawn to Swale Borough Council's guidance.
Loft conversion drawings for Eastling's conservation area designated in 1973 — measured, volume-checked and drawn to Swale Borough Council's guidance.
Loft conversion drawings for Painter's Forstal's conservation area designated in 1992 — measured, volume-checked and drawn to Swale Borough Council's guidance.
Loft conversion drawings for Stalisfield Green's conservation area designated in 1975 — measured, volume-checked and drawn to Swale Borough Council's guidance.
Loft conversion drawings for Syndale's conservation area designated in 2008 — measured, volume-checked and drawn to Swale Borough Council's guidance.
The right loft in East Downs 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 Swale Borough 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 Badlesmere and Doddington and Newnham and Article 4 directions can remove permitted-development rights.
A fixed process built around how Swale Borough Council validates and decides householder loft applications — most drawings are submission-ready within seven days of survey.
Tell us your East Downs 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 Swale Borough 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 Swale Borough Council's roof-alteration guidance.
We submit the certificate or application, manage validation and case-officer queries, and revise the drawings free until Swale Borough 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 East Downs the main exceptions are hip-to-gable conversions, dormers visible from the highway, and homes in conservation areas such as Badlesmere and Doddington and Newnham or on streets with an Article 4 direction. Swale Borough Council is the decision-maker.
Generally no. In conservation areas including Badlesmere and Doddington and Newnham, Class B permitted-development rights for lofts are removed, so a rear dormer that would be lawful elsewhere needs a full application to Swale Borough Council. Swale Borough Council has 22 recorded Article 4 directions, removing permitted development for rear and side extensions — check the address before assuming PD applies in East Downs. We check your exact address before drawing.
On steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 building, common across East Downs, a rear dormer is usually the most efficient conversion and often permitted development. Where the roof is simple gabled and hipped roofs typical of early postwar building, 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. Swale Borough Council is the decision-maker.
A householder planning application in East Downs 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. Swale Borough Council is the decision-maker.
If your dormer is permitted development, a lawful development certificate from Swale Borough 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 East Downs address specifically.
Every roof is different, so we quote each East Downs project individually — a fixed, no-obligation price back within one working day. The quote covers the full drawing pack with free revisions until Swale Borough 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.