Dormer, hip-to-gable and mansard loft conversion drawings for North Downs West homes — prepared to Folkestone and Hythe Council's design guidance, delivered in days and revised free until your decision lands, with a free approval-odds score first.
Folkestone and Hythe Council granted 88% of the householder planning decisions it made in its latest published year — 1 point above the 87% England-wide householder average. North Downs West contains Etchinghill, Postling conservation areas (Etchinghill designated 1973), 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) and postwar (1945–1970) 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. In conservation areas such as Etchinghill and Postling those rights are removed, so we confirm your exact address before a line is drawn. A validated householder application in North Downs West is determined against an 8-week statutory target.
Etchinghill (conservation area designated in 1973), Postling (conservation area designated in 1973), Elmsted (civil parish within North Downs West), Lyminge (civil parish within North Downs West), Monks Horton (civil parish within North Downs West), Postling (civil parish within North Downs West), Sellindge (civil parish within North Downs West) and Stanford (civil parish within North Downs West) — these are the North Downs West pockets our drawings cover most. Heritage designations here include Etchinghill and Postling. Folkestone and Hythe Council weighs each proposal against Folkestone and Hythe Council's development plan and the design policies it applies to householder applications, where the 2,290 homes here are 18% pre-1900, 17% 1965-1972, 9% 1955-1964, 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 shallow-pitched roofs and integral garages typical of that period's building, over Victorian and earlier houses (18% of 2,290 homes), late-1960s and early-1970s houses (17%) and late-1950s and early-1960s houses (9%).
What is permitted in North Downs West turns on designation first, so that is where we start: Etchinghill (conservation area designated in 1973) and Postling (conservation area designated in 1973). Inside those boundaries permitted development is curtailed and Folkestone and Hythe 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, North Downs West takes in Elmsted, Lyminge, Monks Horton, Postling, Sellindge and Stanford. No Article 4 direction is recorded for Folkestone and Hythe Council, but North Downs West's 2 conservation areas still limit permitted development on those streets.
On stock, North Downs West is Victorian and earlier houses (18% of 2,290 homes), late-1960s and early-1970s houses (17%) and late-1950s and early-1960s houses (9%) — which is why steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 building and shallow-pitched roofs and integral garages typical of that period's building govern what a loft or rear projection can realistically be. Folkestone and Hythe Council decided 345 householder applications in the latest published year and granted 88%, with 96% issued inside the eight-week target. We draw to that record rather than to a national average.
The full build-period split for North Downs West runs pre-1900 18% (410 homes), 1900-1918 4% (90 homes), 1919-1929 3% (60 homes), 1930-1939 4% (90 homes), 1945-1954 4% (100 homes), 1955-1964 9% (200 homes), 1965-1972 17% (390 homes), 1973-1982 5% (120 homes), 1983-1992 6% (130 homes), 1993-1999 4% (100 homes) and 2000-2008 6% (140 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.
Folkestone and Hythe Council also decides for Hythe, Hythe Rural, New Romney, North Downs East, Romney Marsh and Walland & Denge Marsh, so a decision in North Downs West 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.
Published figures for North Downs West and Folkestone and Hythe Council. These are the numbers that decide what is realistic on your street, so we work from them rather than from national averages.
| Measure | North Downs West |
|---|---|
| Dwellings recorded | 2,290 |
| Built pre-1900 | 410 (18%) |
| Built 1900-1918 | 90 (4%) |
| Built 1919-1929 | 60 (3%) |
| Built 1930-1939 | 90 (4%) |
| Built 1945-1954 | 100 (4%) |
| Built 1955-1964 | 200 (9%) |
| Built 1965-1972 | 390 (17%) |
| Built 1973-1982 | 120 (5%) |
| Built 1983-1992 | 130 (6%) |
| Built 1993-1999 | 100 (4%) |
| Built 2000-2008 | 140 (6%) |
| Built before 1919 | 22% |
| Built 1919–1939 | 7% |
| Built 1945–2008 | 52% |
| Conservation areas in North Downs West | 2 (Etchinghill, Postling) |
| Conservation areas district-wide | 21 |
| Article 4 directions recorded | 0 |
| Householder applications decided | 345 |
| Householder applications granted | 88% |
| Decided within 8 weeks | 96% |
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 Folkestone and Hythe Council's own, from MHCLG live table PS2 for the year to 31 March 2026.
North Downs West's roofs set the brief. The borough is built largely from Victorian and earlier houses (18% of 2,290 homes), late-1960s and early-1970s houses (17%) and late-1950s and early-1960s houses (9%), and its lofts sit under steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 building and shallow-pitched roofs and integral garages typical of that period's building — the geometry that decides whether a rear dormer, a hip-to-gable or a mansard gives you the headroom you want. Folkestone and Hythe Council assesses loft proposals against Folkestone and Hythe Council's development plan and the design policies it applies to householder applications, 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 Folkestone and Hythe Council can verify them. North Downs West contains Etchinghill, Postling conservation areas (Etchinghill designated 1973), 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.
North Downs West also carries protected streets — Etchinghill and Postling among them. No Article 4 direction is recorded for Folkestone and Hythe Council, but North Downs West's 2 conservation areas still limit permitted development on those streets. We check your address against those designations before a line is drawn.
Many North Downs West 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 Folkestone and Hythe Council if any of these apply:
We draw the roof line, the ridge height and the neighbour's daylight on the page — the relationships Folkestone and Hythe 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 Folkestone and Hythe Council's real householder decision record, pulled from official planning statistics and updated as new data lands. Folkestone and Hythe Council granted 88% of its householder applications in the year to 31 March 2026, and Etchinghill 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 Etchinghill, Postling and Elmsted, 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 shallow-pitched roofs and integral garages typical of that period's building, a hip-to-gable followed by a rear dormer unlocks far more space, though it needs a full application.
The 2,290 homes here are 18% pre-1900, 17% 1965-1972, 9% 1955-1964, 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 Folkestone and Hythe 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 North Downs West roofs come up most often:
Loft conversion drawings for Etchinghill's conservation area designated in 1973 — measured, volume-checked and drawn to Folkestone and Hythe Council's guidance.
Loft conversion drawings for Postling's conservation area designated in 1973 — measured, volume-checked and drawn to Folkestone and Hythe Council's guidance.
Loft conversion drawings for Elmsted's civil parish within North Downs West — measured, volume-checked and drawn to Folkestone and Hythe Council's guidance.
Loft conversion drawings for Lyminge's civil parish within North Downs West — measured, volume-checked and drawn to Folkestone and Hythe Council's guidance.
Loft conversion drawings for Monks Horton's civil parish within North Downs West — measured, volume-checked and drawn to Folkestone and Hythe Council's guidance.
Loft conversion drawings for Postling's civil parish within North Downs West — measured, volume-checked and drawn to Folkestone and Hythe Council's guidance.
The right loft in North Downs West 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 Folkestone and Hythe 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 Etchinghill and Postling and Article 4 directions can remove permitted-development rights.
A fixed process built around how Folkestone and Hythe Council validates and decides householder loft applications — most drawings are submission-ready within seven days of survey.
Tell us your North Downs West 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 Folkestone and Hythe 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 Folkestone and Hythe Council's roof-alteration guidance.
We submit the certificate or application, manage validation and case-officer queries, and revise the drawings free until Folkestone and Hythe 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 North Downs West the main exceptions are hip-to-gable conversions, dormers visible from the highway, and homes in conservation areas such as Etchinghill and Postling or on streets with an Article 4 direction. Folkestone and Hythe Council is the decision-maker.
Generally no. In conservation areas including Etchinghill and Postling, Class B permitted-development rights for lofts are removed, so a rear dormer that would be lawful elsewhere needs a full application to Folkestone and Hythe Council. No Article 4 direction is recorded for Folkestone and Hythe Council, but North Downs West's 2 conservation areas still limit permitted development on those streets. We check your exact address before drawing.
On steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 building, common across North Downs West, a rear dormer is usually the most efficient conversion and often permitted development. Where the roof is shallow-pitched roofs and integral garages typical of that period's 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. Folkestone and Hythe Council is the decision-maker.
A householder planning application in North Downs West 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. Folkestone and Hythe Council is the decision-maker.
If your dormer is permitted development, a lawful development certificate from Folkestone and Hythe 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 North Downs West address specifically.
Every roof is different, so we quote each North Downs West project individually — a fixed, no-obligation price back within one working day. The quote covers the full drawing pack with free revisions until Folkestone and Hythe 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.