Dormer loft conversion plans in Northgate & West Green

Northgate & West Green householder planning by the numbers

Crawley Borough Council granted 82% of the householder planning decisions it made in its latest published year — 5 points below the 87% England-wide householder average. Northgate & West Green contains Dyers Almshouses Conservation Area, St. Peters Conservation Area, Sunnymead Conservation Area conservation areas (Dyers Almshouses Conservation Area designated 1996), 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. Northgate & West Green carries at least one Article 4 direction, and conservation areas including Dyers Almshouses Conservation Area, St. Peters Conservation Area and Sunnymead Conservation Area remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Northgate & West Green is determined against an 8-week statutory target.

Dyers Almshouses (conservation area designated in 1996), St. Peters (conservation area designated in 2022) and Sunnymead (conservation area designated in 2004) — these are the Northgate & West Green pockets our drawings cover most. Heritage designations here include Dyers Almshouses Conservation Area, St. Peters Conservation Area and Sunnymead Conservation Area. Crawley Borough Council weighs each proposal against Crawley Borough Council's development plan and the design policies it applies to householder applications, where the 5,720 homes here are 37% 1945-1954, 7% 1955-1964, 7% 1983-1992, which is what sets the realistic roof and rear-projection options. On roofs the borough is simple gabled and hipped roofs typical of early postwar building and shallow gabled roofs typical of that period's building, over early postwar houses (37% of 5,720 homes), late-1950s and early-1960s houses (7%) and 1980s estate houses (7%).

What actually constrains a project in Northgate & West Green

Northgate & West Green's designated heritage is specific, and it is the first thing we check against your address: Dyers Almshouses (conservation area designated in 1996), St. Peters (conservation area designated in 2022) and Sunnymead (conservation area designated in 2004). Inside those boundaries permitted development is curtailed and Crawley Borough 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.

Crawley Borough Council has 19 recorded Article 4 directions, removing permitted development for painting the exterior — check the address before assuming PD applies in Northgate & West Green.

On stock, Northgate & West Green is early postwar houses (37% of 5,720 homes), late-1950s and early-1960s houses (7%) and 1980s estate houses (7%) — which is why simple gabled and hipped roofs typical of early postwar building and shallow gabled roofs typical of that period's building govern what a loft or rear projection can realistically be. Crawley Borough Council decided 122 householder applications in the latest published year and granted 82%, with 26% issued inside the eight-week target. Those are the numbers our drawings are prepared against.

The full build-period split for Northgate & West Green runs pre-1900 3% (170 homes), 1900-1918 3% (150 homes), 1919-1929 2% (100 homes), 1930-1939 5% (270 homes), 1945-1954 37% (2,100 homes), 1955-1964 7% (410 homes), 1965-1972 5% (270 homes), 1973-1982 3% (160 homes), 1983-1992 7% (410 homes), 1993-1999 6% (320 homes) and 2000-2008 7% (390 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.

Crawley Borough Council also decides for Southgate and Three Bridges, so a decision in Northgate & West Green 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 Aintree Road & Epsom Road, Arden Road, Ardingly Close and Beverley Mews. 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.

The rear dormer, drawn for Northgate & West Green roofs

The box dormer is the workhorse loft, and most of Northgate & West Green is built for it — the borough runs to early postwar houses (37% of 5,720 homes), late-1950s and early-1960s houses (7%) and 1980s estate houses (7%) under simple gabled and hipped roofs typical of early postwar building and shallow gabled roofs typical of that period's building, and a flat-roofed box across the rear slope is the cheapest cubic metre of full-height space those roofs give up. Crawley Borough Council tests the dormer against Crawley Borough Council's development plan and the design policies it applies to householder applications, and because permitted development turns on a number, the volume you propose against the volume you have left is the first thing an officer or a certificate checks.

That is why the arithmetic goes on the drawings. We calculate the box against the 40- or 50-cubic-metre allowance, count any earlier roof enlargement into the total, hold the flat roof below the ridge and set the face back off the eaves so the dormer reads as subordinate. Northgate & West Green contains Dyers Almshouses Conservation Area, St. Peters Conservation Area, Sunnymead Conservation Area conservation areas (Dyers Almshouses Conservation Area designated 1996), so materials, fenestration and roof form are assessed against the appraisal, so the cheeks, the window line and the material are drawn to answer it rather than invite a query.

Where Northgate & West Green's streets are protected — Dyers Almshouses Conservation Area, St. Peters Conservation Area and Sunnymead Conservation Area among them — the Class B dormer right is switched off and even a modest rear box needs consent. Crawley Borough Council has 19 recorded Article 4 directions, removing permitted development for painting the exterior — check the address before assuming PD applies in Northgate & West Green. We confirm the designation before the box is sized.