Dormer, hip-to-gable and mansard loft conversion drawings for Coltishall homes — prepared to Broadland District Council's design guidance, delivered in days and revised free until your decision lands, with a free approval-odds score first.
Broadland District Council granted 97% of the householder planning decisions it made in its latest published year — 10 points above the 87% England-wide householder average. Coltishall contains Coltishall & Horstead BA Con Area, Coltishall & Horstead BDC Conservation Area, Coltishall BDC Conservation Area conservation areas (Coltishall & Horstead BA Con Area designated 1983), 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. Coltishall carries at least one Article 4 direction, and conservation areas including Coltishall & Horstead BA Con Area, Coltishall & Horstead BDC Conservation Area and Coltishall BDC Conservation Area remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Coltishall is determined against an 8-week statutory target.
Coltishall & Horstead BA Con Area (conservation area designated in 1983), Coltishall & Horstead BDC (conservation area designated in 1983), Coltishall BDC (conservation area designated in 1983), RAF Coltishall (conservation area designated in 2010), Horstead with Stanninghall (civil parish within Coltishall) and Crostwick (civil parish within Coltishall) — these are the Coltishall pockets our drawings cover most. Heritage designations here include Coltishall & Horstead BA Con Area, Coltishall & Horstead BDC Conservation Area, Coltishall BDC Conservation Area and RAF Coltishall. Broadland District Council weighs each proposal against the adopted Broadland local plan and Broadland District Council's design guidance for householder work, where the 1,320 homes here are 20% pre-1900, 11% 1955-1964, 10% 1965-1972, 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 (20% of 1,320 homes), late-1950s and early-1960s houses (11%) and late-1960s and early-1970s houses (10%).
What is permitted in Coltishall turns on designation first, so that is where we start: Coltishall & Horstead BA Con Area (conservation area designated in 1983), Coltishall & Horstead BDC (conservation area designated in 1983), Coltishall BDC (conservation area designated in 1983) and RAF Coltishall (conservation area designated in 2010). Inside those boundaries permitted development is curtailed and Broadland 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, Coltishall takes in Horstead with Stanninghall and Crostwick. Broadland District Council has 28 recorded Article 4 directions — check the address before assuming PD applies in Coltishall.
On stock, Coltishall is Victorian and earlier houses (20% of 1,320 homes), late-1950s and early-1960s houses (11%) and late-1960s and early-1970s houses (10%) — 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. Broadland District Council decided 470 householder applications in the latest published year and granted 97%, with 68% issued inside the eight-week target. We draw to that record rather than to a national average.
The full build-period split for Coltishall runs pre-1900 20% (270 homes), 1900-1918 2% (30 homes), 1919-1929 5% (70 homes), 1930-1939 4% (50 homes), 1945-1954 6% (80 homes), 1955-1964 11% (150 homes), 1965-1972 10% (130 homes), 1973-1982 9% (120 homes), 1983-1992 6% (80 homes), 1993-1999 8% (110 homes) and 2000-2008 6% (80 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.
Broadland District Council also decides for Aylsham, Eynesford, Hellesdon North West, Marshes, Plumstead and Wroxham, so a decision in Coltishall 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 Area centred on the Market Place, Broads Authoriity Holly Lodge, Broads Authority and Broads Authority Conservation Area. 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 Coltishall and Broadland 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 | Coltishall |
|---|---|
| Dwellings recorded | 1,320 |
| Built pre-1900 | 270 (20%) |
| Built 1900-1918 | 30 (2%) |
| Built 1919-1929 | 70 (5%) |
| Built 1930-1939 | 50 (4%) |
| Built 1945-1954 | 80 (6%) |
| Built 1955-1964 | 150 (11%) |
| Built 1965-1972 | 130 (10%) |
| Built 1973-1982 | 120 (9%) |
| Built 1983-1992 | 80 (6%) |
| Built 1993-1999 | 110 (8%) |
| Built 2000-2008 | 80 (6%) |
| Built before 1919 | 23% |
| Built 1919–1939 | 9% |
| Built 1945–2008 | 57% |
| Conservation areas in Coltishall | 4 (Coltishall & Horstead BA Con Area, Coltishall & Horstead BDC Conservation Area…) |
| Conservation areas district-wide | 31 |
| Article 4 directions recorded | 28 |
| Householder applications decided | 470 |
| Householder applications granted | 97% |
| Decided within 8 weeks | 68% |
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 Broadland District Council's own, from MHCLG live table PS2 for the year to 31 March 2026.
Coltishall's roofs set the brief. The borough is built largely from Victorian and earlier houses (20% of 1,320 homes), late-1950s and early-1960s houses (11%) and late-1960s and early-1970s houses (10%), 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. Broadland District Council assesses loft proposals against the adopted Broadland local plan and Broadland District 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 Broadland District Council can verify them. Coltishall contains Coltishall & Horstead BA Con Area, Coltishall & Horstead BDC Conservation Area, Coltishall BDC Conservation Area conservation areas (Coltishall & Horstead BA Con Area designated 1983), 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.
Coltishall also carries protected streets — Coltishall & Horstead BA Con Area, Coltishall & Horstead BDC Conservation Area, Coltishall BDC Conservation Area and RAF Coltishall among them. Broadland District Council has 28 recorded Article 4 directions — check the address before assuming PD applies in Coltishall. We check your address against those designations before a line is drawn.
Many Coltishall 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 Broadland 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 Broadland 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 Broadland District Council's real householder decision record, pulled from official planning statistics and updated as new data lands. Broadland District Council granted 97% of its householder applications in the year to 31 March 2026, and Coltishall & Horstead BA Con Area 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 Coltishall & Horstead BA Con Area, Coltishall & Horstead BDC and Coltishall BDC, 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 1,320 homes here are 20% pre-1900, 11% 1955-1964, 10% 1965-1972, 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 Broadland 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 Coltishall roofs come up most often:
Loft conversion drawings for Coltishall & Horstead BA Con Area's conservation area designated in 1983 — measured, volume-checked and drawn to Broadland District Council's guidance.
Loft conversion drawings for Coltishall & Horstead BDC's conservation area designated in 1983 — measured, volume-checked and drawn to Broadland District Council's guidance.
Loft conversion drawings for Coltishall BDC's conservation area designated in 1983 — measured, volume-checked and drawn to Broadland District Council's guidance.
Loft conversion drawings for RAF Coltishall's conservation area designated in 2010 — measured, volume-checked and drawn to Broadland District Council's guidance.
Loft conversion drawings for Horstead with Stanninghall's civil parish within Coltishall — measured, volume-checked and drawn to Broadland District Council's guidance.
Loft conversion drawings for Crostwick's civil parish within Coltishall — measured, volume-checked and drawn to Broadland District Council's guidance.
The right loft in Coltishall 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 Broadland 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 Coltishall & Horstead BA Con Area and Coltishall & Horstead BDC Conservation Area and Article 4 directions can remove permitted-development rights.
A fixed process built around how Broadland District Council validates and decides householder loft applications — most drawings are submission-ready within seven days of survey.
Tell us your Coltishall 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 Broadland 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 Broadland District Council's roof-alteration guidance.
We submit the certificate or application, manage validation and case-officer queries, and revise the drawings free until Broadland 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 Coltishall the main exceptions are hip-to-gable conversions, dormers visible from the highway, and homes in conservation areas such as Coltishall & Horstead BA Con Area and Coltishall & Horstead BDC Conservation Area or on streets with an Article 4 direction. Broadland District Council is the decision-maker.
Generally no. In conservation areas including Coltishall & Horstead BA Con Area and Coltishall & Horstead BDC Conservation Area, Class B permitted-development rights for lofts are removed, so a rear dormer that would be lawful elsewhere needs a full application to Broadland District Council. Broadland District Council has 28 recorded Article 4 directions — check the address before assuming PD applies in Coltishall. We check your exact address before drawing.
On steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 building, common across Coltishall, 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. Broadland District Council is the decision-maker.
A householder planning application in Coltishall 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. Broadland District Council is the decision-maker.
If your dormer is permitted development, a lawful development certificate from Broadland 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. This applies to your Coltishall address specifically.
Every roof is different, so we quote each Coltishall project individually — a fixed, no-obligation price back within one working day. The quote covers the full drawing pack with free revisions until Broadland 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.