The full drawing set for a Denne application — location and block plans, existing and proposed floor plans, elevations and sections, drawn to Horsham District Council's validation checklist so the pack is accepted first time, delivered in days and revised free until your decision, with a free approval-odds check first.
Horsham 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. Denne contains Horsham (London Road) Conservation Area, Horsham (Park Terrace Gardens) Conservation Area, Horsham Conservation Area conservation areas (Horsham (London Road) Conservation Area designated 1984), 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. Denne carries at least one Article 4 direction, and conservation areas including Horsham (London Road) Conservation Area, Horsham (Park Terrace Gardens) Conservation Area and Horsham Conservation Area remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Denne is determined against an 8-week statutory target.
Horsham (London Road) (conservation area designated in 1984), Horsham (Park Terrace Gardens) (conservation area designated in 2023) and Horsham (conservation area designated in 1974) — these are the Denne pockets our drawings cover most. Heritage designations here include Horsham (London Road) Conservation Area, Horsham (Park Terrace Gardens) Conservation Area and Horsham Conservation Area. Horsham District Council weighs each proposal against Horsham District Council's adopted local plan and its householder design guidance, where the 4,910 homes here are 16% 1955-1964, 12% 1983-1992, 11% 2000-2008, which is what sets the realistic roof and rear-projection options. On roofs the borough is shallow gabled roofs typical of that period's building and trussed-rafter roofs typical of 1980s building, over late-1950s and early-1960s houses (16% of 4,910 homes), 1980s estate houses (12%) and 2000s houses and apartments (11%).
Denne's designated heritage is specific, and it is the first thing we check against your address: Horsham (London Road) (conservation area designated in 1984), Horsham (Park Terrace Gardens) (conservation area designated in 2023) and Horsham (conservation area designated in 1974). Inside those boundaries permitted development is curtailed and Horsham 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.
Horsham District Council has 53 recorded Article 4 directions, removing permitted development for rear and side extensions and roof enlargements such as dormers — check the address before assuming PD applies in Denne.
On stock, Denne is late-1950s and early-1960s houses (16% of 4,910 homes), 1980s estate houses (12%) and 2000s houses and apartments (11%) — which is why shallow gabled roofs typical of that period's building and trussed-rafter roofs typical of 1980s building govern what a loft or rear projection can realistically be. Horsham District Council decided 679 householder applications in the latest published year and granted 97%, with 72% issued inside the eight-week target. Those are the numbers our drawings are prepared against.
The full build-period split for Denne runs pre-1900 6% (290 homes), 1900-1918 1% (30 homes), 1919-1929 1% (30 homes), 1930-1939 5% (240 homes), 1945-1954 4% (190 homes), 1955-1964 16% (770 homes), 1965-1972 4% (190 homes), 1973-1982 10% (500 homes), 1983-1992 12% (610 homes), 1993-1999 4% (220 homes) and 2000-2008 11% (520 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.
Horsham District Council also decides for Billingshurst, Colgate & Rusper, Holbrook West and Steyning & Ashurst, so a decision in Denne 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 ART4002 - LAND AT WOLVENS FARM BILLINGSHURST ROAD ASHINGTON, ART4003 - LAND AT CODMORE HILL PULBOROUGH, ART4020/1 and ART4040. 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 Denne and Horsham 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 | Denne |
|---|---|
| Dwellings recorded | 4,910 |
| Built pre-1900 | 290 (6%) |
| Built 1900-1918 | 30 (1%) |
| Built 1919-1929 | 30 (1%) |
| Built 1930-1939 | 240 (5%) |
| Built 1945-1954 | 190 (4%) |
| Built 1955-1964 | 770 (16%) |
| Built 1965-1972 | 190 (4%) |
| Built 1973-1982 | 500 (10%) |
| Built 1983-1992 | 610 (12%) |
| Built 1993-1999 | 220 (4%) |
| Built 2000-2008 | 520 (11%) |
| Built before 1919 | 7% |
| Built 1919–1939 | 5% |
| Built 1945–2008 | 61% |
| Conservation areas in Denne | 3 (Horsham (London Road) Conservation Area, Horsham (Park Terrace Gardens) Conservation Area…) |
| Conservation areas district-wide | 40 |
| Article 4 directions recorded | 53 |
| Householder applications decided | 679 |
| Householder applications granted | 97% |
| Decided within 8 weeks | 72% |
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 Horsham District Council's own, from MHCLG live table PS2 for the year to 31 March 2026.
Whatever you are building, Horsham District Council decides it from the same core set. A location plan at 1:1250 fixes the site on the map with the red-line boundary; a block plan at 1:500 shows the property in its plot; then existing and proposed floor plans and elevations at 1:100 or 1:50 show the house as it is and as it will be. Larger schemes add a section and, where policy requires, a design and access statement. Miss one and the application is returned invalid before an officer has looked at it.
The drawings are also the argument. Horsham District Council assesses each proposal against Horsham District Council's adopted local plan and its householder design guidance, and the elevations are where the case is won or lost — ridge and eaves heights, window positions, materials and how the change reads from the street. On Denne's stock, which runs to late-1950s and early-1960s houses (16% of 4,910 homes), 1980s estate houses (12%) and 2000s houses and apartments (11%), the same scheme is drawn differently to answer the concerns officers raise here. Denne contains Horsham (London Road) Conservation Area, Horsham (Park Terrace Gardens) Conservation Area, Horsham Conservation Area conservation areas (Horsham (London Road) Conservation Area designated 1984), so materials, fenestration and roof form are assessed against the appraisal, so the pack is built to pre-empt exactly that.
Where the property sits in a conservation area — Horsham (London Road) Conservation Area, Horsham (Park Terrace Gardens) Conservation Area and Horsham Conservation Area among Denne's — validation is stricter still, often demanding heritage detail and sometimes additional plans. Horsham District Council has 53 recorded Article 4 directions, removing permitted development for rear and side extensions and roof enlargements such as dormers — check the address before assuming PD applies in Denne. We confirm the designation before drawing so the pack meets the higher bar first time.
Horsham District Council validates against a published checklist before it assesses anything. A typical householder application needs each of these, correctly scaled and labelled:
We draw the complete set — location and block plans, existing and proposed plans, elevations and any section — to Horsham District Council's checklist, then lodge it on the Planning Portal, manage validation and answer case-officer queries so the application is decided on its merits, not bounced on a technicality.
Below is Horsham District Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Horsham District Council granted 97% of its householder applications in the year to 31 March 2026, and Horsham (London Road) Conservation Area shapes what is approved here. A complete, correctly scaled pack that answers those concerns on the elevations is validated faster and refused less often than one that leaves them for the officer to raise.
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.
Two different things sink an application, and they happen at two different stages. First is validation: a missing block plan, an unscaled elevation, no red line, no north point — Horsham District Council returns the whole submission and the clock never starts. Getting the pack right at this stage is purely mechanical, and it is where a lot of self-submitted Denne applications lose weeks. We draw to the checklist so this never happens.
Second is the planning judgement itself, once the pack is valid. The 4,910 homes here are 16% 1955-1964, 12% 1983-1992, 11% 2000-2008, which is what sets the realistic roof and rear-projection options. Across Horsham (London Road), Horsham (Park Terrace Gardens) and Horsham the recurring refusals are about scale, overlooking and how the proposal sits against its neighbours — all of which are settled on the drawings. We draw the scheme to answer them before submission rather than after a refusal.
The application pack is the same discipline whatever the project. A few of the Denne neighbourhoods and property types we prepare drawings for most often:
Planning drawings for Horsham (London Road)'s conservation area designated in 1984 — scaled, validation-ready and drawn to Horsham District Council's guidance.
Planning drawings for Horsham (Park Terrace Gardens)'s conservation area designated in 2023 — scaled, validation-ready and drawn to Horsham District Council's guidance.
Planning drawings for Horsham's conservation area designated in 1974 — scaled, validation-ready and drawn to Horsham District Council's guidance.
The route decides what Horsham District Council needs and how long it takes. This is how the common Denne routes compare.
| Route | When it applies | Core drawings | Typical decision |
|---|---|---|---|
| Householder application | Extensions and alterations to a single house | Location, block, existing & proposed plans and elevations | About 8 weeks |
| Full application | Flats, new units, changes of use | As householder plus site plan and often a section | 8–13 weeks |
| Lawful development certificate | Confirming a scheme is permitted development | Existing & proposed plans and elevations to prove PD limits | About 8 weeks |
| Prior approval | Larger single-storey rear extensions | Plans and elevations plus neighbour notification | About 6 weeks |
In a conservation area such as Horsham (London Road) Conservation Area and Horsham (Park Terrace Gardens) Conservation Area, householder permitted-development rights are often restricted, so a full application and heritage detail may be required.
A fixed process built around how Horsham District Council validates and decides — most drawing sets are submission-ready within seven days of survey.
Send us your Denne postcode and what you want to build. We confirm your conservation and Article 4 status, tell you which application route applies, and score your odds against live Horsham District Council decisions.
We measure the property and plot so the existing plans and elevations are accurate to the millimetre — the base every proposed drawing and every officer judgement is built on.
Chartered designers produce the full validation pack — location and block plans, existing and proposed plans, elevations, any section and a design and access statement — drawn to Horsham District Council's checklist.
We lodge the application on the Planning Portal, manage validation and case-officer queries, and revise the drawings free until Horsham District Council issues its decision.
Horsham District Council validates a householder application against a set list: a location plan at 1:1250 with a red-line boundary, a block plan at 1:500, and existing and proposed floor plans and elevations at 1:100 or 1:50, each with a scale bar and north point. Larger schemes and most conservation-area work also need a design and access statement. If any of these is missing or unscaled the application is returned invalid before it is assessed. This applies to your Denne address specifically.
Almost always because the drawing pack is incomplete or wrongly scaled — a missing block plan, an elevation with no scale, no red line on the location plan, no north point. Horsham District Council checks the pack against its validation list before an officer ever assesses the scheme, so these purely technical gaps cost weeks. Drawing to the checklist from the outset is the simplest way to avoid a return. This applies to your Denne address specifically.
Yes. We prepare the full drawing set, lodge it on the Planning Portal on your behalf, pay the Horsham District Council fee where you prefer us to, and then manage validation and case-officer questions through to the decision. You get the reference number and updates without dealing with the portal or the council yourself. This applies to your Denne address specifically.
A householder application is a statutory eight weeks from validation, and a full application eight to thirteen weeks depending on scale. The date that matters is validation, not submission — an invalid pack never starts the clock. Because we draw to Horsham District Council's checklist the application validates quickly, so the statutory period begins without the delay a returned pack causes. This applies to your Denne address specifically.
You do not strictly need a planning application, but scaled existing and proposed drawings are still worth having: a lawful development certificate from Horsham District Council proves the scheme is permitted development, which lenders and buyers increasingly ask for, and your builder needs the drawings to price and build. In a conservation area such as Horsham (London Road) Conservation Area and Horsham (Park Terrace Gardens) Conservation Area, permitted-development rights are often removed, so a full application may be needed after all — we confirm which before you commit. This applies to your Denne address specifically.
We price each Denne job individually — the scope of the survey and the size of the drawing set vary from a simple rear extension to a whole-house scheme — and send a fixed, no-obligation quote within one working day. It covers the full validation pack with free revisions until Horsham District Council decides. The Horsham District Council application fee is separate and paid to the council. Call 020 7864 7245 to start.
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Same fixed quotes, same fast drawings — wherever your project is.