Side-return infill drawings for East Flegg terraces — the glazed extension that fills the redundant side alley and opens up the kitchen, drawn to Great Yarmouth Borough Council's guidance, delivered in days and revised free until your decision, with a free approval-odds check first.
Great Yarmouth Borough Council granted 92% of the householder planning decisions it made in its latest published year — 5 points above the 87% England-wide householder average. East Flegg contains No.13 East & West Somerton, No.18 Newport Cottages, No.7 Hemsby conservation areas (No.13 East & West Somerton designated 1987), 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. East Flegg carries at least one Article 4 direction, and conservation areas including No.13 East & West Somerton, No.18 Newport Cottages and No.7 Hemsby remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in East Flegg is determined against an 8-week statutory target.
No.13 East & West Somerton (conservation area designated in 1987), No.18 Newport Cottages (conservation area designated in 2013), No.7 Hemsby (conservation area designated in 1977), No.9 Winterton (conservation area designated in 1979), Somerton (civil parish within East Flegg), Winterton-on-Sea (civil parish within East Flegg) and Hemsby (civil parish within East Flegg) — these are the East Flegg pockets our drawings cover most. Heritage designations here include No.13 East & West Somerton, No.18 Newport Cottages, No.7 Hemsby and No.9 Winterton. Great Yarmouth Borough Council weighs each proposal against Great Yarmouth Borough Council's development plan and the design policies it applies to householder applications, where the 3,690 homes here are 30% 1973-1982, 18% 1965-1972, 10% 1983-1992, which is what sets the realistic roof and rear-projection options. On roofs the borough is shallow trussed roofs typical of 1970s building and shallow-pitched roofs and integral garages typical of that period's building, over 1970s and early-1980s houses (30% of 3,690 homes), late-1960s and early-1970s houses (18%) and 1980s estate houses (10%).
What is permitted in East Flegg turns on designation first, so that is where we start: No.13 East & West Somerton (conservation area designated in 1987), No.18 Newport Cottages (conservation area designated in 2013), No.7 Hemsby (conservation area designated in 1977) and No.9 Winterton (conservation area designated in 1979). Inside those boundaries permitted development is curtailed and Great Yarmouth 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.
Beyond the designated areas, East Flegg takes in Somerton, Winterton-on-Sea and Hemsby. Great Yarmouth Borough Council has 18 recorded Article 4 directions — check the address before assuming PD applies in East Flegg.
On stock, East Flegg is 1970s and early-1980s houses (30% of 3,690 homes), late-1960s and early-1970s houses (18%) and 1980s estate houses (10%) — which is why shallow trussed roofs typical of 1970s building and shallow-pitched roofs and integral garages typical of that period's building govern what a loft or rear projection can realistically be. Great Yarmouth Borough Council decided 153 householder applications in the latest published year and granted 92%, with 69% issued inside the eight-week target. We draw to that record rather than to a national average.
The full build-period split for East Flegg runs pre-1900 7% (240 homes), 1900-1918 2% (80 homes), 1919-1929 4% (130 homes), 1930-1939 5% (170 homes), 1945-1954 1% (40 homes), 1955-1964 8% (300 homes), 1965-1972 18% (650 homes), 1973-1982 30% (1,100 homes), 1983-1992 10% (360 homes), 1993-1999 3% (100 homes) and 2000-2008 6% (220 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.
Great Yarmouth Borough Council also decides for Central and Northgate, Gorleston, Nelson, Ormesby, St Andrews and West Flegg, so a decision in East Flegg 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 Article 4 Direction - Fleggburgh, Article 4 Direction - Hemsby Parish, Article 4 Direction - Horsey, Winterton, Sea Palling and Article 4 Direction - Houses in Multiple Occupation Great Yarmouth. 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 East Flegg and Great Yarmouth Borough Council. These are the numbers that decide what is realistic on your street, so we work from them rather than from national averages.
| Measure | East Flegg |
|---|---|
| Dwellings recorded | 3,690 |
| Built pre-1900 | 240 (7%) |
| Built 1900-1918 | 80 (2%) |
| Built 1919-1929 | 130 (4%) |
| Built 1930-1939 | 170 (5%) |
| Built 1945-1954 | 40 (1%) |
| Built 1955-1964 | 300 (8%) |
| Built 1965-1972 | 650 (18%) |
| Built 1973-1982 | 1,100 (30%) |
| Built 1983-1992 | 360 (10%) |
| Built 1993-1999 | 100 (3%) |
| Built 2000-2008 | 220 (6%) |
| Built before 1919 | 9% |
| Built 1919–1939 | 8% |
| Built 1945–2008 | 75% |
| Conservation areas in East Flegg | 4 (No.13 East & West Somerton, No.18 Newport Cottages…) |
| Conservation areas district-wide | 23 |
| Article 4 directions recorded | 18 |
| Householder applications decided | 153 |
| Householder applications granted | 92% |
| Decided within 8 weeks | 69% |
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 Great Yarmouth Borough Council's own, from MHCLG live table PS2 for the year to 31 March 2026.
The side return is the classic terrace fix, and East Flegg has the stock for it — the borough is built largely from 1970s and early-1980s houses (30% of 3,690 homes), late-1960s and early-1970s houses (18%) and 1980s estate houses (10%), and the Victorian and Edwardian versions almost all have an L-shaped back addition with a wasted alley beside it. Fill that alley and the dark galley kitchen becomes a bright, square room the full width of the house. Great Yarmouth Borough Council judges the infill against Great Yarmouth Borough Council's development plan and the design policies it applies to householder applications, and because it runs along the party boundary, the neighbour relationship is read before the design.
That boundary is where the drawings earn their keep. We set the infill wall on or up to the line, keep the roof — usually a glazed lantern or a shallow pitch tying into the existing back-addition slope — below the neighbour's first-floor windows, and detail the rainwater and party-wall junction so the build is watertight and the Party Wall Act is satisfied. East Flegg contains No.13 East & West Somerton, No.18 Newport Cottages, No.7 Hemsby conservation areas (No.13 East & West Somerton designated 1987), so materials, fenestration and roof form are assessed against the appraisal, so we resolve it on the section rather than leave it to the case officer.
Many of East Flegg's terraces sit in conservation areas — No.13 East & West Somerton, No.18 Newport Cottages, No.7 Hemsby and No.9 Winterton among them — where a side extension is no longer permitted development. Great Yarmouth Borough Council has 18 recorded Article 4 directions — check the address before assuming PD applies in East Flegg. We confirm the designation before a line is drawn.
Some single-storey side returns in East Flegg are permitted development, but the width and boundary make an application more likely than for a straight rear extension. You will normally need to apply to Great Yarmouth Borough Council if any of these apply:
We draw the infill wall on the boundary, the glazed roof below the neighbour's windows and the party-wall junction on the page — the details Great Yarmouth Borough Council's officers and your neighbour both check — and submit a validation-complete pack, whether that is a lawful development certificate or a full householder application.
Below is Great Yarmouth Borough Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Great Yarmouth Borough Council granted 92% of its householder applications in the year to 31 March 2026, and No.13 East & West Somerton shapes what is approved here. Side returns hinge on width, roof glazing and the party boundary, so a pack that resolves those details upfront is decided 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.
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 No.13 East & West Somerton, No.18 Newport Cottages and No.7 Hemsby, the approved side return is a single-storey infill roofed with a glazed lantern or roof light to pull daylight deep into the plan, its flank wall built on the boundary and finished to match the host brick. On the borough's 1970s and early-1980s houses (30% of 3,690 homes), this is frequently the single biggest gain in usable ground-floor space, and where it stays within the width and height limits it can proceed under permitted development or a lawful development certificate.
The 3,690 homes here are 30% 1973-1982, 18% 1965-1972, 10% 1983-1992, which is what sets the realistic roof and rear-projection options. We keep the glazed roof below the neighbour's cill line, set the gutter and the party-wall flashing so water and maintenance are designed in, and — where owners want the full open-plan room — pair the infill with a rear extension as a single wraparound application. That way Great Yarmouth Borough Council sees one coherent scheme rather than two overlapping ones.
We draw side-return infills on every terraced street in the borough. A few of the neighbourhoods where East Flegg side returns come up most often:
Side return extension drawings for No.13 East & West Somerton's conservation area designated in 1987 — width-checked, party-wall detailed and drawn to Great Yarmouth Borough Council's guidance.
Side return extension drawings for No.18 Newport Cottages's conservation area designated in 2013 — width-checked, party-wall detailed and drawn to Great Yarmouth Borough Council's guidance.
Side return extension drawings for No.7 Hemsby's conservation area designated in 1977 — width-checked, party-wall detailed and drawn to Great Yarmouth Borough Council's guidance.
Side return extension drawings for No.9 Winterton's conservation area designated in 1979 — width-checked, party-wall detailed and drawn to Great Yarmouth Borough Council's guidance.
Side return extension drawings for Somerton's civil parish within East Flegg — width-checked, party-wall detailed and drawn to Great Yarmouth Borough Council's guidance.
Side return extension drawings for Winterton-on-Sea's civil parish within East Flegg — width-checked, party-wall detailed and drawn to Great Yarmouth Borough Council's guidance.
Whether a side return in East Flegg needs permission comes down to width, storeys and whether the street is designated. This is how the cases compare.
| Side return type | Permitted development? | What it gains | What Great Yarmouth Borough Council checks |
|---|---|---|---|
| Single-storey infill, within limits | Often yes, if under half the house width | Full-width kitchen-diner | Width, 4m height, roof glazing |
| Single-storey, over half width | No — full application | Wider room, more light | Boundary treatment, neighbour amenity |
| Two-storey side return | No — full application | Room above as well as below | Bulk, overlooking, terrace rhythm |
| Wraparound (side + rear) | No — full application | L-shaped open-plan ground floor | Combined footprint, garden retained |
In conservation areas such as No.13 East & West Somerton and No.18 Newport Cottages, side extensions are not permitted development and always need a full application.
A fixed process built around how Great Yarmouth Borough Council validates and decides side-return applications — most drawings are submission-ready within seven days of survey.
Send us your East Flegg postcode and terrace type. We confirm your conservation and Article 4 status, whether the infill stays within the side-extension width limit, and score your odds against live Great Yarmouth Borough Council decisions.
We measure the side alley, the back-addition wall, floor and eaves levels and the neighbour's window heights — the numbers the width limit, roof pitch and party-wall detailing depend on.
Chartered designers develop the infill and its glazed roof to your brief, drawn inside the permitted-development limits or to Great Yarmouth Borough Council's extension guidance, with the boundary and party-wall junction detailed.
We submit the certificate or application, manage validation and case-officer queries, and revise the drawings free until Great Yarmouth Borough Council issues its decision.
Sometimes not. A single-storey side-return infill can be permitted development if it is no wider than half the original house, no higher than 4 metres, and the property is not on designated land. In East Flegg you will need a full application to Great Yarmouth Borough Council for anything wider or taller, for a two-storey side return, and for any side extension in a conservation area such as No.13 East & West Somerton and No.18 Newport Cottages, where those rights are removed.
It is an infill that fills the narrow open alley running alongside the rear back-addition of a Victorian or Edwardian terrace — the strip of ground that is usually too small to use. Building over it squares off the ground floor, so a cramped galley kitchen becomes a full-width room. East Flegg's period terraces are ideally suited to it, which is why the side return is one of the borough's most common extensions. Great Yarmouth Borough Council is the decision-maker.
Almost always. A side return is built on or up to the boundary with your neighbour, so the Party Wall etc. Act applies and you must serve notice before work starts — this is entirely separate from Great Yarmouth Borough Council's planning decision. We detail the party-wall junction on the drawings and flag the notice early so a surveyor can be appointed without delaying the build. This applies to your East Flegg address specifically.
Yes, and it is common — the combined L-shape is a wraparound extension. Once the side infill joins a rear projection beyond the permitted-development depth, the whole thing needs a full householder application to Great Yarmouth Borough Council rather than qualifying as permitted development. We draw it as one coherent scheme so the council assesses a single footprint, which reads more clearly than two overlapping proposals. This applies to your East Flegg address specifically.
A householder planning application in East Flegg runs to a statutory eight-week target, and a lawful development certificate to eight weeks as well, though an incomplete pack can stall at validation. Because a side return involves the boundary and roof glazing, a complete, well-detailed submission matters — we prepare it validation-complete and manage officer queries to keep the decision on track. Great Yarmouth Borough Council is the decision-maker.
We price each East Flegg side return individually, because alley width and roof form 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 Great Yarmouth Borough Council approves, and we confirm at the outset whether your infill is permitted development or needs an application. Call 020 7864 7245 to start.
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