Dormer, hip-to-gable and mansard loft conversion drawings for Herne & Broomfield homes — prepared to Canterbury City Council's design guidance, delivered in days and revised free until your decision lands, with a free approval-odds score first.
Canterbury City Council granted 97% of the householder planning decisions it made in its latest published year — 10 points above the 87% England-wide householder average. Herne & Broomfield contains BROOMFIELD - Reg: 05/01/1998, HAWE FARM, HERNE WINDMILL conservation areas (HAWE FARM designated 1990), so materials, fenestration and roof form are assessed against the appraisal, which is where a policy-literate drawing pack earns its keep. Its dominant 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. Herne & Broomfield carries at least one Article 4 direction, and conservation areas including BROOMFIELD - Reg: 05/01/1998, HAWE FARM and HERNE WINDMILL remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Herne & Broomfield is determined against an 8-week statutory target.
BROOMFIELD - Reg: 05/01/1998 (designated conservation area), HAWE FARM (conservation area designated in 1990), HERNE WINDMILL (conservation area designated in 1990), The Herne (conservation area designated in 1990) and Herne and Broomfield (civil parish within Herne & Broomfield) — these are the Herne & Broomfield pockets our drawings cover most. Heritage designations here include BROOMFIELD - Reg: 05/01/1998, HAWE FARM, HERNE WINDMILL and The Herne Conservation Area. Canterbury City Council weighs each proposal against Canterbury City Council's adopted local plan and its householder design guidance, where the 4,070 homes here are 16% 1973-1982, 16% 1955-1964, 12% 1983-1992, which is what sets the realistic roof and rear-projection options. On roofs the borough is shallow trussed roofs typical of 1970s building and shallow gabled roofs typical of that period's building, over 1970s and early-1980s houses (16% of 4,070 homes), late-1950s and early-1960s houses (16%) and 1980s estate houses (12%).
Herne & Broomfield's designated heritage is specific, and it is the first thing we check against your address: BROOMFIELD - Reg: 05/01/1998 (designated conservation area), HAWE FARM (conservation area designated in 1990), HERNE WINDMILL (conservation area designated in 1990) and The Herne (conservation area designated in 1990). Inside those boundaries permitted development is curtailed and Canterbury City 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, Herne & Broomfield takes in Herne and Broomfield. Canterbury City Council has 463 recorded Article 4 directions — check the address before assuming PD applies in Herne & Broomfield.
On stock, Herne & Broomfield is 1970s and early-1980s houses (16% of 4,070 homes), late-1950s and early-1960s houses (16%) and 1980s estate houses (12%) — which is why shallow trussed roofs typical of 1970s building and shallow gabled roofs typical of that period's building govern what a loft or rear projection can realistically be. Canterbury City Council decided 580 householder applications in the latest published year and granted 97%, with 43% issued inside the eight-week target. Those are the numbers our drawings are prepared against.
The full build-period split for Herne & Broomfield runs pre-1900 6% (260 homes), 1900-1918 1% (50 homes), 1919-1929 2% (80 homes), 1930-1939 5% (200 homes), 1945-1954 2% (80 homes), 1955-1964 16% (650 homes), 1965-1972 8% (340 homes), 1973-1982 16% (660 homes), 1983-1992 12% (490 homes), 1993-1999 5% (200 homes) and 2000-2008 9% (370 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.
Canterbury City Council also decides for Blean Forest, Chestfield, Gorrell, Heron, St Stephen's, Westgate, Wincheap and Little Stour & Adisham, so a decision in Herne & Broomfield 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 CHURCH COTTAGES, CHURCH LANE, NACKINGTON, 1 BOURNE COTTAGES, THE STREET, BISHOPSBOURNE, 1 BOX TREE COTTAGES, BOLTS HILL and 1 BUTTS COTTAGES, LOWER HARDRES. 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 Herne & Broomfield and Canterbury City Council. These are the numbers that decide what is realistic on your street, so we work from them rather than from national averages.
| Measure | Herne & Broomfield |
|---|---|
| Dwellings recorded | 4,070 |
| Built pre-1900 | 260 (6%) |
| Built 1900-1918 | 50 (1%) |
| Built 1919-1929 | 80 (2%) |
| Built 1930-1939 | 200 (5%) |
| Built 1945-1954 | 80 (2%) |
| Built 1955-1964 | 650 (16%) |
| Built 1965-1972 | 340 (8%) |
| Built 1973-1982 | 660 (16%) |
| Built 1983-1992 | 490 (12%) |
| Built 1993-1999 | 200 (5%) |
| Built 2000-2008 | 370 (9%) |
| Built before 1919 | 8% |
| Built 1919–1939 | 7% |
| Built 1945–2008 | 69% |
| Conservation areas in Herne & Broomfield | 4 (BROOMFIELD - Reg: 05/01/1998, HAWE FARM…) |
| Conservation areas district-wide | 98 |
| Article 4 directions recorded | 463 |
| Householder applications decided | 580 |
| Householder applications granted | 97% |
| Decided within 8 weeks | 43% |
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 Canterbury City Council's own, from MHCLG live table PS2 for the year to 31 March 2026.
Herne & Broomfield's roofs set the brief. The borough is built largely from 1970s and early-1980s houses (16% of 4,070 homes), late-1950s and early-1960s houses (16%) and 1980s estate houses (12%), and its lofts sit under shallow trussed roofs typical of 1970s building and shallow gabled roofs 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. Canterbury City Council assesses loft proposals against Canterbury City Council's adopted local plan and its householder design guidance, 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 Canterbury City Council can verify them. Herne & Broomfield contains BROOMFIELD - Reg: 05/01/1998, HAWE FARM, HERNE WINDMILL conservation areas (HAWE FARM designated 1990), 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.
Herne & Broomfield also carries protected streets — BROOMFIELD - Reg: 05/01/1998, HAWE FARM, HERNE WINDMILL and The Herne Conservation Area among them. Canterbury City Council has 463 recorded Article 4 directions — check the address before assuming PD applies in Herne & Broomfield. We check your address against those designations before a line is drawn.
Many Herne & Broomfield 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 Canterbury 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 Canterbury 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 Canterbury City Council's real householder decision record, pulled from official planning statistics and updated as new data lands. Canterbury City Council granted 97% of its householder applications in the year to 31 March 2026, and BROOMFIELD - Reg: 05/01/1998 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 BROOMFIELD - Reg: 05/01/1998, HAWE FARM and HERNE WINDMILL, 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 shallow trussed roofs typical of 1970s building, that is usually the most efficient use of the roof; where the stock is shallow gabled roofs 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 4,070 homes here are 16% 1973-1982, 16% 1955-1964, 12% 1983-1992, 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 Canterbury 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 Herne & Broomfield roofs come up most often:
Loft conversion drawings for BROOMFIELD - Reg: 05/01/1998's designated conservation area — measured, volume-checked and drawn to Canterbury City Council's guidance.
Loft conversion drawings for HAWE FARM's conservation area designated in 1990 — measured, volume-checked and drawn to Canterbury City Council's guidance.
Loft conversion drawings for HERNE WINDMILL's conservation area designated in 1990 — measured, volume-checked and drawn to Canterbury City Council's guidance.
Loft conversion drawings for The Herne's conservation area designated in 1990 — measured, volume-checked and drawn to Canterbury City Council's guidance.
Loft conversion drawings for Herne and Broomfield's civil parish within Herne & Broomfield — measured, volume-checked and drawn to Canterbury City Council's guidance.
The right loft in Herne & Broomfield 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 Canterbury 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 BROOMFIELD - Reg: 05/01/1998 and HAWE FARM and Article 4 directions can remove permitted-development rights.
A fixed process built around how Canterbury City Council validates and decides householder loft applications — most drawings are submission-ready within seven days of survey.
Tell us your Herne & Broomfield 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 Canterbury 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 Canterbury City Council's roof-alteration guidance.
We submit the certificate or application, manage validation and case-officer queries, and revise the drawings free until Canterbury 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 Herne & Broomfield the main exceptions are hip-to-gable conversions, dormers visible from the highway, and homes in conservation areas such as BROOMFIELD - Reg: 05/01/1998 and HAWE FARM or on streets with an Article 4 direction. Canterbury City Council is the decision-maker.
Generally no. In conservation areas including BROOMFIELD - Reg: 05/01/1998 and HAWE FARM, Class B permitted-development rights for lofts are removed, so a rear dormer that would be lawful elsewhere needs a full application to Canterbury City Council. Canterbury City Council has 463 recorded Article 4 directions — check the address before assuming PD applies in Herne & Broomfield. We check your exact address before drawing.
On shallow trussed roofs typical of 1970s building, common across Herne & Broomfield, a rear dormer is usually the most efficient conversion and often permitted development. Where the roof is shallow gabled roofs 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. Canterbury City Council is the decision-maker.
A householder planning application in Herne & Broomfield 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. Canterbury City Council is the decision-maker.
If your dormer is permitted development, a lawful development certificate from Canterbury 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 Herne & Broomfield address specifically.
Every roof is different, so we quote each Herne & Broomfield project individually — a fixed, no-obligation price back within one working day. The quote covers the full drawing pack with free revisions until Canterbury 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.