Two-storey extension drawings for North Lincolnshire homes — bedroom above, living space below, drawn against the 3-metre projection and 7-metre boundary rules and to North Lincolnshire Council's design guidance, delivered in days and revised free until your decision.
North Lincolnshire Council granted 91% of the householder planning decisions it made in its latest published year — 4 points above the 87% England-wide householder average. North Lincolnshire contains Barrow upon Humber Conservation area, Brigg Conservation area, Crowle Conservation area conservation areas (Barrow upon Humber Conservation area designated 1974), 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) 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. North Lincolnshire carries at least one Article 4 direction, and conservation areas including Barrow upon Humber Conservation area, Brigg Conservation area and Crowle Conservation area remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in North Lincolnshire is determined against an 8-week statutory target.
Barrow upon Humber (conservation area designated in 1974), Brigg (conservation area designated in 1971), Crowle (conservation area designated in 1989), Epworth (conservation area designated in 1970), Kirton in Lindsey (conservation area designated in 1970), Redbourne (conservation area designated in 1985), Saxby All Saints (conservation area designated in 1977), Scawby (conservation area designated in 1985), Axholme Central (ward of North Lincolnshire), Axholme North (ward of North Lincolnshire), Brigg & Wolds (ward of North Lincolnshire), Broughton & Scawby (ward of North Lincolnshire), Ferry (ward of North Lincolnshire) and Ridge (ward of North Lincolnshire) — these are the North Lincolnshire pockets our drawings cover most. Heritage designations here include Barrow upon Humber Conservation area, Brigg Conservation area, Crowle Conservation area, Epworth Conservation area, Kirton in Lindsey Conservation area, Redbourne Conservation area, Saxby All Saints Conservation area and Scawby Conservation area. North Lincolnshire Council weighs each proposal against the adopted North Lincolnshire local plan and North Lincolnshire Council's design guidance for householder work, where the 24,290 homes here are 15% pre-1900, 9% 2000-2008, 7% 1973-1982, 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 trussed-rafter roofs typical of 2000s building, over Victorian and earlier houses (15% of 24,290 homes), 2000s houses and apartments (9%) and 1970s and early-1980s houses (7%).
North Lincolnshire's designated heritage is specific, and it is the first thing we check against your address: Barrow upon Humber (conservation area designated in 1974), Brigg (conservation area designated in 1971), Crowle (conservation area designated in 1989), Epworth (conservation area designated in 1970), Kirton in Lindsey (conservation area designated in 1970), Redbourne (conservation area designated in 1985), Saxby All Saints (conservation area designated in 1977) and Scawby (conservation area designated in 1985). Inside those boundaries permitted development is curtailed and North Lincolnshire 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 Lincolnshire takes in Axholme Central, Axholme North, Brigg & Wolds, Broughton & Scawby, Ferry and Ridge. North Lincolnshire Council has 12 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 the district.
On stock, North Lincolnshire is Victorian and earlier houses (15% of 24,290 homes), 2000s houses and apartments (9%) and 1970s and early-1980s houses (7%) — which is why steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 building and trussed-rafter roofs typical of 2000s building govern what a loft or rear projection can realistically be. North Lincolnshire Council decided 338 householder applications in the latest published year and granted 91%, with 70% issued inside the eight-week target. Those are the numbers our drawings are prepared against.
The full build-period split for North Lincolnshire 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 Lincolnshire Council also decides for Axholme Central, Axholme North, Brigg & Wolds, Broughton & Scawby, Ferry and Ridge, so a decision in North Lincolnshire 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 Alkborough & Walcot, Appleby, Barrow upon Humber and Barton upon Humber. 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 North Lincolnshire and North Lincolnshire Council. These are the numbers that decide what is realistic on your street, so we work from them rather than from national averages.
| Measure | North Lincolnshire |
|---|---|
| Dwellings recorded | 24,290 |
| 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 | 18% |
| Built 1919–1939 | 9% |
| Built 1945–2008 | 63% |
| Conservation areas in North Lincolnshire | 8 (Barrow upon Humber Conservation area, Brigg Conservation area…) |
| Conservation areas district-wide | 17 |
| Article 4 directions recorded | 12 |
| Householder applications decided | 338 |
| Householder applications granted | 91% |
| Decided within 8 weeks | 70% |
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 North Lincolnshire Council's own, from MHCLG live table PS2 for the year to 31 March 2026.
Adding at first floor changes the question the case officer asks. A single-storey extension is judged mostly on daylight and garden loss; a two-storey extension is judged on overlooking, bulk against the neighbouring roofline, and whether it reads as part of the house or bolted onto it. North Lincolnshire is largely Victorian and earlier houses (15% of 24,290 homes), 2000s houses and apartments (9%) and 1970s and early-1980s houses (7%), and steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 building and trussed-rafter roofs typical of 2000s building set what a matching roof actually means here.
The permitted-development route exists but is narrow: 3 metres of rear projection, a 7-metre stand-off from the rear boundary, eaves and ridge no higher than the original, and side-facing upper windows obscure-glazed and non-opening below 1.7 metres above floor level. Most two-storey schemes fail one of those, usually the 7-metre boundary rule on a shorter garden, and go in as a full application instead. We establish which route applies before designing, because it changes the drawing set.
North Lincolnshire contains Barrow upon Humber Conservation area, Brigg Conservation area, Crowle Conservation area conservation areas (Barrow upon Humber Conservation area designated 1974), so materials, fenestration and roof form are assessed against the appraisal. North Lincolnshire Council has 12 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 the district.
Some two-storey rear extensions are permitted development. You will need a full application to North Lincolnshire Council if any of these apply:
We set the projection and boundary distance on the site plan, prove the roof-pitch match on the elevations, and specify obscure glazing on the side windows — the three things North Lincolnshire Council checks first — then submit a validation-complete pack.
Below is North Lincolnshire Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. North Lincolnshire Council granted 91% of 338 householder decisions in the year to 31 March 2026, 70% of them inside eight weeks. Two-storey schemes attract more neighbour comment than any other householder work, so the overlooking and daylight case has to be made on the drawings.
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 Barrow upon Humber, Brigg and Crowle, the schemes that succeed set the first floor back from the ground floor, keep the ridge below the original, and treat the flank wall as blank or obscure-glazed. On victorian and earlier houses (15% of 24,290 homes), matching the eaves line matters more than matching the brick: an extension that carries the existing eaves through reads as original even in a different material.
The 24,290 homes here are 15% pre-1900, 9% 2000-2008, 7% 1973-1982, which is what sets the realistic roof and rear-projection options. We draw the 45-degree daylight test from the neighbour's nearest habitable window, show the window positions in section, and set out the steel and foundation implications early — a two-storey extension changes the load path, so the structural design and the planning design have to be developed together rather than in sequence.
We draw two-storey extensions across North Lincolnshire. A few of the areas where they come up most often:
Two storey extension drawings for Barrow upon Humber — conservation area designated in 1974 — dimensioned against the 3m and 7m limits and drawn to North Lincolnshire Council's guidance.
Two storey extension drawings for Brigg — conservation area designated in 1971 — dimensioned against the 3m and 7m limits and drawn to North Lincolnshire Council's guidance.
Two storey extension drawings for Crowle — conservation area designated in 1989 — dimensioned against the 3m and 7m limits and drawn to North Lincolnshire Council's guidance.
Two storey extension drawings for Epworth — conservation area designated in 1970 — dimensioned against the 3m and 7m limits and drawn to North Lincolnshire Council's guidance.
Two storey extension drawings for Kirton in Lindsey — conservation area designated in 1970 — dimensioned against the 3m and 7m limits and drawn to North Lincolnshire Council's guidance.
Two storey extension drawings for Redbourne — conservation area designated in 1985 — dimensioned against the 3m and 7m limits and drawn to North Lincolnshire Council's guidance.
The first-floor limits are tighter than the ground-floor ones. This is how the common cases compare.
| Scheme | Permitted development? | Deciding limit | What North Lincolnshire Council checks |
|---|---|---|---|
| Two-storey rear, 3m projection, 7m+ to boundary | Often yes | 3m projection / 7m boundary | Roof match, side-window glazing |
| Two-storey rear, under 7m to boundary | No — full application | Rear-boundary distance | Overlooking, daylight, garden loss |
| Two-storey side extension | No — full application | Side elevation | Gap to boundary, street rhythm |
| Two-storey wraparound | No — full application | Combined footprint | Bulk, massing, neighbour amenity |
| Any two-storey on designated land | No — full application | Designation | Character and appearance |
Limits from the GPDO 2015, Schedule 2, Part 1, Class A — two-storey rear extension conditions.
A fixed process built around how North Lincolnshire Council validates and decides two-storey applications.
Send us your North Lincolnshire postcode and garden depth. We measure the 7-metre boundary rule against your plot, confirm designation status, and score your odds against live North Lincolnshire Council decisions.
We measure the original rear wall, eaves and ridge heights, garden depth and every neighbouring window that faces the site — the inputs the daylight and overlooking case is built from.
Chartered designers develop the two-storey addition to your brief with the roof and eaves resolved, and we coordinate the load path so the structural scheme and the planning scheme are the same building.
We submit the application, manage validation and case-officer queries, and revise the drawings free until North Lincolnshire Council issues its decision.
Often, but not always. A two-storey rear extension can be permitted development if it projects no more than 3 metres, sits at least 7 metres from the rear boundary, does not exceed the existing eaves and ridge, and has obscure-glazed non-opening side windows below 1.7 metres. In North Lincolnshire, the 7-metre rule is what most commonly forces a full application to North Lincolnshire Council.
No part of a permitted-development two-storey rear extension may come within 7 metres of the boundary opposite the rear wall of the house. It exists to protect the neighbour behind you from being overlooked at first floor. On shorter North Lincolnshire gardens this is decisive, and we measure it on survey before any design work rather than discovering it at validation. North Lincolnshire Council is the decision-maker.
Not under permitted development — two-storey side extensions always need a full application to North Lincolnshire Council. They are assessed on the gap to the boundary, whether the street's rhythm of spaces between houses survives, and whether the extension is subordinate to the original. Setting the first floor back from the front building line and down from the ridge is what usually makes the difference.
Overlooking is the most common objection, and it is answerable on the drawings. We position habitable-room windows away from neighbouring gardens, obscure-glaze and fix shut anything on the flank below 1.7 metres, and show the sight lines in section. Where the geometry is tight, a rooflight or a high-level window gives the same daylight without the mutual overlooking that draws objections. This applies to your North Lincolnshire address specifically. North Lincolnshire Council is the decision-maker.
Almost certainly. Excavating within 3 metres of a neighbouring structure and building on or up to the boundary both trigger the Party Wall etc. Act 1996, and a two-storey extension usually does both. It is entirely separate from North Lincolnshire Council's planning decision, so we flag the notice period early and detail the junction on the drawings.
Yes. Adding a floor changes the load path from roof to foundation, so beams, padstones and foundation depths all need designing and calculating for building control. Planning and building regulations are separate consents, and the structural set is what building control assesses — we prepare both so the approved scheme is the buildable one. This applies to your North Lincolnshire address specifically. North Lincolnshire Council is the decision-maker.
We quote each North Lincolnshire two-storey extension individually, because plot depth, roof form and structural complexity vary house to house, and send a fixed, no-obligation quote within one working day. It covers the drawing pack with free revisions until North Lincolnshire Council approves. Call 020 7864 7245 to start.
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