Dormer, hip-to-gable and mansard loft conversion drawings for Thurnby & Houghton homes — prepared to Harborough District Council's design guidance, delivered in days and revised free until your decision lands, with a free approval-odds score first.
Harborough District Council granted 92% of the householder planning decisions it made in its latest published year — 5 points above the 87% England-wide householder average. Thurnby & Houghton contains Houghton on the Hill, Hungarton, Keyham conservation areas (Houghton on the Hill designated 1973), 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. In conservation areas such as Houghton on the Hill, Hungarton and Keyham those rights are removed, so we confirm your exact address before a line is drawn. A validated householder application in Thurnby & Houghton is determined against an 8-week statutory target.
Houghton on the Hill (conservation area designated in 1973), Hungarton (conservation area designated in 1975), Keyham (conservation area designated in 1975), Scraptoft (conservation area designated in 1994), Stoughton (conservation area designated in 1987), Thurnby and Bushby (conservation area designated in 1977), Scraptoft (civil parish within Thurnby & Houghton), Stoughton (civil parish within Thurnby & Houghton), Thurnby and Bushby (civil parish within Thurnby & Houghton), Keyham (civil parish within Thurnby & Houghton), Houghton on the Hill (civil parish within Thurnby & Houghton) and Hungarton (civil parish within Thurnby & Houghton) — these are the Thurnby & Houghton pockets our drawings cover most. Heritage designations here include Houghton on the Hill, Hungarton, Keyham, Scraptoft, Stoughton and Thurnby and Bushby. Harborough District Council weighs each proposal against the adopted Harborough local plan and Harborough District Council's design guidance for householder work, where the 3,960 homes here are 15% 1955-1964, 11% 1965-1972, 9% 1983-1992, 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 shallow-pitched roofs and integral garages typical of that period's building, over late-1950s and early-1960s houses (15% of 3,960 homes), late-1960s and early-1970s houses (11%) and 1980s estate houses (9%).
What is permitted in Thurnby & Houghton turns on designation first, so that is where we start: Houghton on the Hill (conservation area designated in 1973), Hungarton (conservation area designated in 1975), Keyham (conservation area designated in 1975), Scraptoft (conservation area designated in 1994), Stoughton (conservation area designated in 1987) and Thurnby and Bushby (conservation area designated in 1977). Inside those boundaries permitted development is curtailed and Harborough 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, Thurnby & Houghton takes in Scraptoft, Stoughton, Thurnby and Bushby, Keyham, Houghton on the Hill and Hungarton. No Article 4 direction is recorded for Harborough District Council, but Thurnby & Houghton's 6 conservation areas still limit permitted development on those streets.
On stock, Thurnby & Houghton is late-1950s and early-1960s houses (15% of 3,960 homes), late-1960s and early-1970s houses (11%) and 1980s estate houses (9%) — which is why shallow gabled roofs typical of that period's building and shallow-pitched roofs and integral garages typical of that period's building govern what a loft or rear projection can realistically be. Harborough District Council decided 439 householder applications in the latest published year and granted 92%, with 51% issued inside the eight-week target. We draw to that record rather than to a national average.
The full build-period split for Thurnby & Houghton runs pre-1900 5% (190 homes), 1900-1918 1% (40 homes), 1919-1929 2% (90 homes), 1930-1939 5% (200 homes), 1945-1954 4% (160 homes), 1955-1964 15% (610 homes), 1965-1972 11% (430 homes), 1973-1982 7% (270 homes), 1983-1992 9% (340 homes), 1993-1999 6% (220 homes) and 2000-2008 7% (280 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.
Harborough District Council also decides for Billesdon & Tilton, Bosworth, Dunton, Fleckney, Glen, Kibworths, Lubenham and Misterton, so a decision in Thurnby & Houghton 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.
Published figures for Thurnby & Houghton and Harborough 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 | Thurnby & Houghton |
|---|---|
| Dwellings recorded | 3,960 |
| Built pre-1900 | 190 (5%) |
| Built 1900-1918 | 40 (1%) |
| Built 1919-1929 | 90 (2%) |
| Built 1930-1939 | 200 (5%) |
| Built 1945-1954 | 160 (4%) |
| Built 1955-1964 | 610 (15%) |
| Built 1965-1972 | 430 (11%) |
| Built 1973-1982 | 270 (7%) |
| Built 1983-1992 | 340 (9%) |
| Built 1993-1999 | 220 (6%) |
| Built 2000-2008 | 280 (7%) |
| Built before 1919 | 6% |
| Built 1919–1939 | 7% |
| Built 1945–2008 | 58% |
| Conservation areas in Thurnby & Houghton | 6 (Houghton on the Hill, Hungarton…) |
| Conservation areas district-wide | 50 |
| Article 4 directions recorded | 0 |
| Householder applications decided | 439 |
| Householder applications granted | 92% |
| Decided within 8 weeks | 51% |
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 Harborough District Council's own, from MHCLG live table PS2 for the year to 31 March 2026.
Thurnby & Houghton's roofs set the brief. The borough is built largely from late-1950s and early-1960s houses (15% of 3,960 homes), late-1960s and early-1970s houses (11%) and 1980s estate houses (9%), and its lofts sit under shallow gabled roofs typical of that period's building and shallow-pitched roofs and integral garages 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. Harborough District Council assesses loft proposals against the adopted Harborough local plan and Harborough 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 Harborough District Council can verify them. Thurnby & Houghton contains Houghton on the Hill, Hungarton, Keyham conservation areas (Houghton on the Hill designated 1973), 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.
Thurnby & Houghton also carries protected streets — Houghton on the Hill, Hungarton, Keyham, Scraptoft, Stoughton and Thurnby and Bushby among them. No Article 4 direction is recorded for Harborough District Council, but Thurnby & Houghton's 6 conservation areas still limit permitted development on those streets. We check your address against those designations before a line is drawn.
Many Thurnby & Houghton 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 Harborough 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 Harborough 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 Harborough District Council's real householder decision record, pulled from official planning statistics and updated as new data lands. Harborough District Council granted 92% of its householder applications in the year to 31 March 2026, and Houghton on the Hill 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 Houghton on the Hill, Hungarton and Keyham, 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 shallow gabled roofs typical of that period's building, that is usually the most efficient use of the roof; where the stock is shallow-pitched roofs and integral garages 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 3,960 homes here are 15% 1955-1964, 11% 1965-1972, 9% 1983-1992, 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 Harborough 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 Thurnby & Houghton roofs come up most often:
Loft conversion drawings for Houghton on the Hill's conservation area designated in 1973 — measured, volume-checked and drawn to Harborough District Council's guidance.
Loft conversion drawings for Hungarton's conservation area designated in 1975 — measured, volume-checked and drawn to Harborough District Council's guidance.
Loft conversion drawings for Keyham's conservation area designated in 1975 — measured, volume-checked and drawn to Harborough District Council's guidance.
Loft conversion drawings for Scraptoft's conservation area designated in 1994 — measured, volume-checked and drawn to Harborough District Council's guidance.
Loft conversion drawings for Stoughton's conservation area designated in 1987 — measured, volume-checked and drawn to Harborough District Council's guidance.
Loft conversion drawings for Thurnby and Bushby's conservation area designated in 1977 — measured, volume-checked and drawn to Harborough District Council's guidance.
The right loft in Thurnby & Houghton 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 Harborough 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 Houghton on the Hill and Hungarton and Article 4 directions can remove permitted-development rights.
A fixed process built around how Harborough District Council validates and decides householder loft applications — most drawings are submission-ready within seven days of survey.
Tell us your Thurnby & Houghton 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 Harborough 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 Harborough District Council's roof-alteration guidance.
We submit the certificate or application, manage validation and case-officer queries, and revise the drawings free until Harborough 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 Thurnby & Houghton the main exceptions are hip-to-gable conversions, dormers visible from the highway, and homes in conservation areas such as Houghton on the Hill and Hungarton or on streets with an Article 4 direction. Harborough District Council is the decision-maker.
Generally no. In conservation areas including Houghton on the Hill and Hungarton, Class B permitted-development rights for lofts are removed, so a rear dormer that would be lawful elsewhere needs a full application to Harborough District Council. No Article 4 direction is recorded for Harborough District Council, but Thurnby & Houghton's 6 conservation areas still limit permitted development on those streets. We check your exact address before drawing.
On shallow gabled roofs typical of that period's building, common across Thurnby & Houghton, a rear dormer is usually the most efficient conversion and often permitted development. Where the roof is shallow-pitched roofs and integral garages 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. Harborough District Council is the decision-maker.
A householder planning application in Thurnby & Houghton 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. Harborough District Council is the decision-maker.
If your dormer is permitted development, a lawful development certificate from Harborough 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 Thurnby & Houghton address specifically.
Every roof is different, so we quote each Thurnby & Houghton project individually — a fixed, no-obligation price back within one working day. The quote covers the full drawing pack with free revisions until Harborough 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.