Dormer loft conversion plans in North East Derbyshire

North East Derbyshire planning decisions and design rules

North East Derbyshire District Council granted 93% of the householder planning decisions it made in its latest published year — 6 points above the 87% England-wide householder average. North East Derbyshire contains Amber Mill and Toad Hole, Barlow, Barlow Grange conservation areas (Amber Mill and Toad Hole 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 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. In conservation areas such as Amber Mill and Toad Hole, Barlow and Barlow Grange those rights are removed, so we confirm your exact address before a line is drawn. A validated householder application in North East Derbyshire is determined against an 8-week statutory target.

Amber Mill and Toad Hole (conservation area designated in 1990), Barlow (conservation area designated in 1979), Barlow Grange (conservation area designated in 1990), Barlow Mills and Crow Holes (conservation area designated in 1990), Barlow Woodseats and Johnnygate (conservation area designated in 1990), Cartledge (conservation area designated in 1990), Clay Cross (conservation area designated in 2010), Coal Aston (conservation area designated in 1983), Barlow & Holmesfield (ward of North East Derbyshire), Brampton & Walton (ward of North East Derbyshire), Clay Cross North (ward of North East Derbyshire), Coal Aston (ward of North East Derbyshire), Holmewood & Heath (ward of North East Derbyshire), Pilsley & Morton (ward of North East Derbyshire), Ridgeway & Marsh Lane (ward of North East Derbyshire) and Shirland (ward of North East Derbyshire) — these are the North East Derbyshire pockets our drawings cover most. Heritage designations here include Amber Mill and Toad Hole, Barlow, Barlow Grange, Barlow Mills and Crow Holes, Barlow Woodseats and Johnnygate, Cartledge, Clay Cross and Coal Aston. North East Derbyshire District Council weighs each proposal against North East Derbyshire District Council's development plan and the design policies it applies to householder applications, where the 19,260 homes here are 14% pre-1900, 12% 1955-1964, 11% 1945-1954, 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 (14% of 19,260 homes), late-1950s and early-1960s houses (12%) and early postwar houses (11%).

Why a North East Derbyshire scheme is judged on North East Derbyshire terms

What is permitted in North East Derbyshire turns on designation first, so that is where we start: Amber Mill and Toad Hole (conservation area designated in 1990), Barlow (conservation area designated in 1979), Barlow Grange (conservation area designated in 1990), Barlow Mills and Crow Holes (conservation area designated in 1990), Barlow Woodseats and Johnnygate (conservation area designated in 1990), Cartledge (conservation area designated in 1990), Clay Cross (conservation area designated in 2010) and Coal Aston (conservation area designated in 1983). Inside those boundaries permitted development is curtailed and North East Derbyshire 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, North East Derbyshire takes in Barlow & Holmesfield, Brampton & Walton, Clay Cross North, Coal Aston, Holmewood & Heath, Pilsley & Morton, Ridgeway & Marsh Lane and Shirland. No Article 4 direction is recorded for North East Derbyshire District Council, but the district's 8 conservation areas still limit permitted development on those streets.

On stock, North East Derbyshire is Victorian and earlier houses (14% of 19,260 homes), late-1950s and early-1960s houses (12%) and early postwar houses (11%) — 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. North East Derbyshire District Council decided 304 householder applications in the latest published year and granted 93%, with 62% issued inside the eight-week target. We draw to that record rather than to a national average.

The full build-period split for North East Derbyshire 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.

North East Derbyshire District Council also decides for Barlow & Holmesfield, Brampton & Walton, Clay Cross North, Coal Aston, Holmewood & Heath, Pilsley & Morton, Ridgeway & Marsh Lane and Shirland, so a decision in North East Derbyshire 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 rear dormer, drawn for North East Derbyshire roofs

The box dormer is the workhorse loft, and most of North East Derbyshire is built for it — the borough runs to Victorian and earlier houses (14% of 19,260 homes), late-1950s and early-1960s houses (12%) and early postwar houses (11%) 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, and a flat-roofed box across the rear slope is the cheapest cubic metre of full-height space those roofs give up. North East Derbyshire District Council tests the dormer against North East Derbyshire District 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. North East Derbyshire contains Amber Mill and Toad Hole, Barlow, Barlow Grange conservation areas (Amber Mill and Toad Hole designated 1990), 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 North East Derbyshire's streets are protected — Amber Mill and Toad Hole, Barlow, Barlow Grange, Barlow Mills and Crow Holes, Barlow Woodseats and Johnnygate, Cartledge, Clay Cross and Coal Aston among them — the Class B dormer right is switched off and even a modest rear box needs consent. No Article 4 direction is recorded for North East Derbyshire District Council, but the district's 8 conservation areas still limit permitted development on those streets. We confirm the designation before the box is sized.