Rear dormer drawings for Hart roofs — the box across the back slope that turns a low attic into a full-height room, drawn to Hart District Council's guidance and the volume limits, delivered in days and revised free until your decision, with a free approval-odds check first.
Hart District Council granted 86% of the householder planning decisions it made in its latest published year — 1 point below the 87% England-wide householder average. Hart contains Basingstoke Canal 1, Basingstoke Canal2, Basingstoke Canal3 conservation areas (Basingstoke Canal 1 designated 2009), 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.
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. Hart carries at least one Article 4 direction, and conservation areas including Basingstoke Canal 1, Basingstoke Canal2 and Basingstoke Canal3 remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Hart is determined against an 8-week statutory target.
Basingstoke Canal 1 (conservation area designated in 2009), Basingstoke Canal2 (conservation area designated in 2009), Basingstoke Canal3 (conservation area designated in 2009), Basingstoke Canal4 (conservation area designated in 2009), Basingstoke Canal5 (conservation area designated in 2009), Bramshill (conservation area designated in 2012), Cricket Hill (conservation area designated in 2011), Crondall (conservation area designated in 2024), Blackwater and Hawley (ward of Hart), Fleet Central (ward of Hart), Fleet East (ward of Hart), Fleet West (ward of Hart), Hartley Wintney (ward of Hart), Odiham (ward of Hart) and Yateley East (ward of Hart) — these are the Hart pockets our drawings cover most. Heritage designations here include Basingstoke Canal 1, Basingstoke Canal2, Basingstoke Canal3, Basingstoke Canal4, Basingstoke Canal5, Bramshill, Cricket Hill and Crondall. Hart District Council weighs each proposal against Hart District Council's development plan and the design policies it applies to householder applications, where the 26,660 homes here are 15% 1965-1972, 11% 1955-1964, 10% 1983-1992, which is what sets the realistic roof and rear-projection options. On roofs the borough is shallow-pitched roofs and integral garages typical of that period's building and shallow gabled roofs typical of that period's building, over late-1960s and early-1970s houses (15% of 26,660 homes), late-1950s and early-1960s houses (11%) and 1980s estate houses (10%).
What is permitted in Hart turns on designation first, so that is where we start: Basingstoke Canal 1 (conservation area designated in 2009), Basingstoke Canal2 (conservation area designated in 2009), Basingstoke Canal3 (conservation area designated in 2009), Basingstoke Canal4 (conservation area designated in 2009), Basingstoke Canal5 (conservation area designated in 2009), Bramshill (conservation area designated in 2012), Cricket Hill (conservation area designated in 2011) and Crondall (conservation area designated in 2024). Inside those boundaries permitted development is curtailed and Hart 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, Hart takes in Blackwater and Hawley, Fleet Central, Fleet East, Fleet West, Hartley Wintney, Odiham and Yateley East. Hart District Council has 47 recorded Article 4 directions — check the address before assuming PD applies in the district.
On stock, Hart is late-1960s and early-1970s houses (15% of 26,660 homes), late-1950s and early-1960s houses (11%) and 1980s estate houses (10%) — which is why shallow-pitched roofs and integral garages typical of that period's building and shallow gabled roofs typical of that period's building govern what a loft or rear projection can realistically be. Hart District Council decided 445 householder applications in the latest published year and granted 86%, with 71% issued inside the eight-week target. We draw to that record rather than to a national average.
The full build-period split for Hart 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.
Hart District Council also decides for Blackwater and Hawley, Fleet Central, Fleet East, Fleet West, Hartley Wintney, Odiham and Yateley East, so a decision in Hart 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 Bramshill, Broad Oak Odiham Hampshire., Church Farm (Eversley) and Cricket Hill Yateley (Extension). 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 Hart and Hart 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 | Hart |
|---|---|
| Dwellings recorded | 26,660 |
| 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 | 11% |
| Built 1919–1939 | 5% |
| Built 1945–2008 | 69% |
| Conservation areas in Hart | 8 (Basingstoke Canal 1, Basingstoke Canal2…) |
| Conservation areas district-wide | 39 |
| Article 4 directions recorded | 47 |
| Householder applications decided | 445 |
| Householder applications granted | 86% |
| Decided within 8 weeks | 71% |
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 Hart District Council's own, from MHCLG live table PS2 for the year to 31 March 2026.
The box dormer is the workhorse loft, and most of Hart is built for it — the borough runs to late-1960s and early-1970s houses (15% of 26,660 homes), late-1950s and early-1960s houses (11%) and 1980s estate houses (10%) under shallow-pitched roofs and integral garages typical of that period's 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. Hart District Council tests the dormer against Hart 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. Hart contains Basingstoke Canal 1, Basingstoke Canal2, Basingstoke Canal3 conservation areas (Basingstoke Canal 1 designated 2009), 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 Hart's streets are protected — Basingstoke Canal 1, Basingstoke Canal2, Basingstoke Canal3, Basingstoke Canal4, Basingstoke Canal5, Bramshill, Cricket Hill and Crondall among them — the Class B dormer right is switched off and even a modest rear box needs consent. Hart District Council has 47 recorded Article 4 directions — check the address before assuming PD applies in the district. We confirm the designation before the box is sized.
Many rear dormers in Hart are permitted development, but the volume and position decide it. You will normally need a full application to Hart District Council if any of these apply:
We draw the box within its volume allowance, the flat roof below the ridge and the face set back off the eaves — the three things a dormer stands or falls on — and submit a validation-complete pack, whether that is a lawful development certificate or a full householder application.
Below is Hart District Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Hart District Council granted 86% of 445 householder decisions in the year to 31 March 2026, 71% of them inside eight weeks. A dormer is decided on volume and set-back, so a pack that shows the calculation and the eaves detail is cleared faster and refused less often than a DIY submission.
Source: MHCLG planning application statistics (householder decisions, England, 1 April 2025 - 31 March 2026). Compare every borough on our London approval-rate league table.
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Across Basingstoke Canal 1, Basingstoke Canal2 and Basingstoke Canal3, the dormer that goes through is the subordinate rear box: flat roof kept low, cheeks clad to recede, side windows obscure-glazed against overlooking, and the whole thing set back so the original eaves line still reads from the garden. On shallow-pitched roofs and integral garages typical of that period's building, this returns a full-height double and en-suite from what was standing-room-only, usually inside the permitted-development volume.
The 26,660 homes here are 15% 1965-1972, 11% 1955-1964, 10% 1983-1992, which is what sets the realistic roof and rear-projection options. We keep the box off the ridge, match the cheek material to the roof, and where the volume is already spent — or the street is designated — draw the dormer as a householder application composed to Hart District Council's roof-alteration guidance rather than push a certificate that would be refused.
We draw rear dormers on the terraced and semi-detached streets across the borough. A few of the neighbourhoods where Hart dormers come up most often:
Dormer loft drawings for Basingstoke Canal 1's conservation area designated in 2009 — volume-checked, set-back-detailed and drawn to Hart District Council's guidance.
Dormer loft drawings for Basingstoke Canal2's conservation area designated in 2009 — volume-checked, set-back-detailed and drawn to Hart District Council's guidance.
Dormer loft drawings for Basingstoke Canal3's conservation area designated in 2009 — volume-checked, set-back-detailed and drawn to Hart District Council's guidance.
Dormer loft drawings for Basingstoke Canal4's conservation area designated in 2009 — volume-checked, set-back-detailed and drawn to Hart District Council's guidance.
Dormer loft drawings for Basingstoke Canal5's conservation area designated in 2009 — volume-checked, set-back-detailed and drawn to Hart District Council's guidance.
Dormer loft drawings for Bramshill's conservation area designated in 2012 — volume-checked, set-back-detailed and drawn to Hart District Council's guidance.
Whether a dormer in Hart needs permission comes down to where it sits and how big the box is. This is how the cases compare.
| Dormer type | Permitted development? | What it gains | What Hart District Council checks |
|---|---|---|---|
| Rear box, within volume | Usually yes | Full-height room across the back | Volume total, 20cm eaves set-back |
| Rear box, over volume limit | No — full application | A larger room | How far over the allowance, bulk |
| Front or side dormer | No — full application | Light to the front rooms | Visibility from the street, character |
| Dormer in a conservation area | No — full application | Same space, extra scrutiny | Roof form and street appearance |
In conservation areas such as Basingstoke Canal 1 and Basingstoke Canal2, Class B dormer rights are removed and every dormer needs a full application.
A fixed process built around how Hart District Council validates and decides dormer applications — most drawings are submission-ready within seven days of survey.
Send us your Hart postcode and roof type. We confirm your conservation and Article 4 status, work out how much permitted-development volume you have left, and score your odds against live Hart District Council decisions.
We measure ridge and eaves heights, roof pitch and the existing loft floor — the numbers the volume calculation, the set-back and the head heights depend on.
Chartered designers develop the box to your brief, drawn inside the Class B volume limits or, where those are exhausted or removed, to Hart District Council's roof-alteration guidance.
We submit the certificate or application, manage validation and case-officer queries, and revise the drawings free until Hart District Council issues its decision.
Often not. A rear box dormer within 40 cubic metres on a terrace, or 50 on a semi or detached house, set back at least 20 centimetres from the eaves and kept below the ridge, is usually permitted development. In Hart you will need a full application to Hart District Council for a front or side dormer, a box that exceeds the volume, and any dormer in a conservation area such as Basingstoke Canal 1 and Basingstoke Canal2, where those rights are removed.
The permitted-development limit is a volume, not a footprint: 40 cubic metres of added roof space on a terraced house and 50 on a semi-detached or detached one, and any earlier loft enlargement counts against that total. In Hart the box must also sit below the ridge and back from the eaves. We measure your roof and calculate the exact volume you have left before drawing. Hart District Council is the decision-maker.
Not under permitted development. A dormer on the front roof slope, or one facing a highway, always needs a full application to Hart District Council, because it changes how the house reads from the street. Rear box dormers are far more likely to be approved — or to be permitted development outright — which is why almost every Hart dormer we draw sits on the back slope.
Often, on a terrace or semi. If the dormer or the loft steelwork meets the party wall with your neighbour, the Party Wall etc. Act applies and notice must be served before work starts — separately from Hart District Council's planning decision. We flag the party-wall junction on the drawings so a surveyor can be appointed early and the build is not held up.
If your dormer is permitted development, a lawful development certificate from Hart District Council is council-stamped proof of it — worth holding, because a buyer's solicitor will ask for it when you sell. We prepare and submit the certificate with the same measured drawing pack that shows the box within its volume allowance.
We price each Hart dormer individually, because the roof pitch and the volume left vary house to house, and send a fixed, no-obligation quote within one working day. It covers the full drawing pack with free revisions until Hart District Council approves, and we confirm at the outset whether your box is permitted development or needs an application. Call 020 7864 7245 to start.
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