Dormer, hip-to-gable and mansard loft conversion drawings for Arun homes — prepared to Arun District Council's design guidance, delivered in days and revised free until your decision lands, with a free approval-odds score first.
Arun District Council granted 94% of the householder planning decisions it made in its latest published year — 7 points above the 87% England-wide householder average. Arun contains Aldingbourne Church Road, Angmering, Barnham (Church Lane) conservation areas (Aldingbourne Church Road designated 1998), 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.
Class A and Class B set the thresholds — a rear dormer to 40m³ on a terrace or 50m³ on a semi or detached, and a single-storey rear extension to 3m on a terrace or 4m on a detached house — beyond which Arun District Council needs a full application. In conservation areas such as Aldingbourne Church Road, Angmering and Barnham (Church Lane) those rights are removed, so we confirm your exact address before a line is drawn. A validated householder application in Arun is determined against an 8-week statutory target.
Aldingbourne Church Road (conservation area designated in 1998), Angmering (designated conservation area), Barnham (Church Lane) (conservation area designated in 1998), Bognor Regis (Aldwick Road) (conservation area designated in 1994), Bognor Regis (Railway Station) (conservation area designated in 1994), Bognor Regis (The Steyne and Waterloo Square) (conservation area designated in 1994), Bognor Regis (Upper Bognor Road and Mead Lane) (conservation area designated in 1993), East Preston Station Road (conservation area designated in 1994), Angmering & Findon (ward of Arun), Arundel & Walberton (ward of Arun), Barnham (ward of Arun), Beach (ward of Arun), Bersted (ward of Arun), East Preston (ward of Arun), Hotham (ward of Arun) and Marine (ward of Arun) — these are the Arun pockets our drawings cover most. Heritage designations here include Aldingbourne Church Road, Angmering, Barnham (Church Lane), Bognor Regis (Aldwick Road), Bognor Regis (Railway Station), Bognor Regis (The Steyne and Waterloo Square), Bognor Regis (Upper Bognor Road and Mead Lane) and East Preston Station Road. Arun District Council weighs each proposal against Arun District Council's adopted local plan and its householder design guidance, where the 43,470 homes here are 9% pre-1900, 8% 1955-1964, 7% 1973-1982, 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 gabled roofs typical of that period's building, over Victorian and earlier houses (9% of 43,470 homes), late-1950s and early-1960s houses (8%) and 1970s and early-1980s houses (7%).
Heritage designation is the single biggest variable in Arun, and it is address-specific: Aldingbourne Church Road (conservation area designated in 1998), Angmering (designated conservation area), Barnham (Church Lane) (conservation area designated in 1998), Bognor Regis (Aldwick Road) (conservation area designated in 1994), Bognor Regis (Railway Station) (conservation area designated in 1994), Bognor Regis (The Steyne and Waterloo Square) (conservation area designated in 1994), Bognor Regis (Upper Bognor Road and Mead Lane) (conservation area designated in 1993) and East Preston Station Road (conservation area designated in 1994). Inside those boundaries permitted development is curtailed and Arun District 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, Arun takes in Angmering & Findon, Arundel & Walberton, Barnham, Beach, Bersted, East Preston, Hotham and Marine. No Article 4 direction is recorded for Arun District Council, but the district's 8 conservation areas still limit permitted development on those streets.
On stock, Arun is Victorian and earlier houses (9% of 43,470 homes), late-1950s and early-1960s houses (8%) and 1970s and early-1980s houses (7%) — which is why steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 building and shallow gabled roofs typical of that period's building govern what a loft or rear projection can realistically be. Arun District Council decided 453 householder applications in the latest published year and granted 94%, with 99% issued inside the eight-week target. We work from the council's own published record.
The full build-period split for Arun runs pre-1900 3% (190 homes), 1900-1918 0% (30 homes), 1919-1929 0% (10 homes), 1930-1939 6% (350 homes), 1945-1954 3% (170 homes), 1955-1964 30% (1,850 homes), 1965-1972 33% (1,990 homes), 1973-1982 4% (260 homes), 1983-1992 5% (310 homes), 1993-1999 4% (220 homes) and 2000-2008 3% (170 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.
Arun District Council also decides for Angmering & Findon, Arundel & Walberton, Barnham, Beach, Bersted, East Preston, Hotham and Marine, so a decision in Arun 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 Arun and Arun District Council. These are the numbers that decide what is realistic on your street, so we work from them rather than from national averages.
| Measure | Arun |
|---|---|
| Dwellings recorded | 43,470 |
| Built pre-1900 | 190 (3%) |
| Built 1900-1918 | 30 (0%) |
| Built 1919-1929 | 10 (0%) |
| Built 1930-1939 | 350 (6%) |
| Built 1945-1954 | 170 (3%) |
| Built 1955-1964 | 1,850 (30%) |
| Built 1965-1972 | 1,990 (33%) |
| Built 1973-1982 | 260 (4%) |
| Built 1983-1992 | 310 (5%) |
| Built 1993-1999 | 220 (4%) |
| Built 2000-2008 | 170 (3%) |
| Built before 1919 | 18% |
| Built 1919–1939 | 12% |
| Built 1945–2008 | 55% |
| Conservation areas in Arun | 8 (Aldingbourne Church Road, Angmering…) |
| Conservation areas district-wide | 23 |
| Article 4 directions recorded | 0 |
| Householder applications decided | 453 |
| Householder applications granted | 94% |
| Decided within 8 weeks | 99% |
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 Arun District Council's own, from MHCLG live table PS2 for the year to 31 March 2026.
Arun's roofs set the brief. The borough is built largely from Victorian and earlier houses (9% of 43,470 homes), late-1950s and early-1960s houses (8%) and 1970s and early-1980s houses (7%), and its lofts sit under steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 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. Arun District Council assesses loft proposals against Arun District 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 Arun District Council can verify them. Arun contains Aldingbourne Church Road, Angmering, Barnham (Church Lane) conservation areas (Aldingbourne Church Road designated 1998), 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.
Arun also carries protected streets — Aldingbourne Church Road, Angmering, Barnham (Church Lane), Bognor Regis (Aldwick Road), Bognor Regis (Railway Station), Bognor Regis (The Steyne and Waterloo Square), Bognor Regis (Upper Bognor Road and Mead Lane) and East Preston Station Road among them. No Article 4 direction is recorded for Arun District Council, but the district's 8 conservation areas still limit permitted development on those streets. We check your address against those designations before a line is drawn.
Many Arun 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 Arun District Council if any of these apply:
We draw the roof line, the ridge height and the neighbour's daylight on the page — the relationships Arun District 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 Arun District Council's real householder decision record, pulled from official planning statistics and updated as new data lands. Arun District Council granted 94% of 453 householder decisions in the year to 31 March 2026, 99% of them inside eight weeks. 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 Aldingbourne Church Road, Angmering and Barnham (Church Lane), 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 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 43,470 homes here are 9% pre-1900, 8% 1955-1964, 7% 1973-1982, 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 Arun District 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 Arun roofs come up most often:
Loft conversion drawings for Aldingbourne Church Road's conservation area designated in 1998 — measured, volume-checked and drawn to Arun District Council's guidance.
Loft conversion drawings for Angmering's designated conservation area — measured, volume-checked and drawn to Arun District Council's guidance.
Loft conversion drawings for Barnham (Church Lane)'s conservation area designated in 1998 — measured, volume-checked and drawn to Arun District Council's guidance.
Loft conversion drawings for Bognor Regis (Aldwick Road)'s conservation area designated in 1994 — measured, volume-checked and drawn to Arun District Council's guidance.
Loft conversion drawings for Bognor Regis (Railway Station)'s conservation area designated in 1994 — measured, volume-checked and drawn to Arun District Council's guidance.
Loft conversion drawings for Bognor Regis (The Steyne and Waterloo Square)'s conservation area designated in 1994 — measured, volume-checked and drawn to Arun District Council's guidance.
The right loft in Arun 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 Arun District 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 Aldingbourne Church Road and Angmering and Article 4 directions can remove permitted-development rights.
A fixed process built around how Arun District Council validates and decides householder loft applications — most drawings are submission-ready within seven days of survey.
Tell us your Arun 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 Arun District 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 Arun District Council's roof-alteration guidance.
We submit the certificate or application, manage validation and case-officer queries, and revise the drawings free until Arun District 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 Arun the main exceptions are hip-to-gable conversions, dormers visible from the highway, and homes in conservation areas such as Aldingbourne Church Road and Angmering or on streets with an Article 4 direction. Arun District Council is the decision-maker.
Generally no. In conservation areas including Aldingbourne Church Road and Angmering, Class B permitted-development rights for lofts are removed, so a rear dormer that would be lawful elsewhere needs a full application to Arun District Council. No Article 4 direction is recorded for Arun District Council, but the district's 8 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 Arun, 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. Arun District Council is the decision-maker.
A householder planning application in Arun 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. Arun District Council is the decision-maker.
If your dormer is permitted development, a lawful development certificate from Arun District 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.
Every roof is different, so we quote each Arun project individually — a fixed, no-obligation price back within one working day. The quote covers the full drawing pack with free revisions until Arun District 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.