Annexe and granny-flat drawings for Wigan homes — designed to stay ancillary to the main house rather than become a separate dwelling, drawn to Wigan Council's policies, delivered in days and revised free until your decision.
Wigan Council granted 89% of the householder planning decisions it made in its latest published year — 2 points above the 87% England-wide householder average. A large share of the borough is Green Belt, so extension and outbuilding scale is tightly held on affected plots away from the urban cores, which is where a policy-literate drawing pack earns its keep. Its dominant Victorian (1837–1901), Edwardian (1901–1910), interwar (1918–1939) and postwar (1945–1970) housing stock sets the design brief on most streets.
Class A and Class B set the thresholds — a rear dormer to 40m³ on a terrace or 50m³ on a semi or detached, and a single-storey rear extension to 3m on a terrace or 4m on a detached house — beyond which Wigan Council needs a full application. Wigan carries at least one Article 4 direction, and conservation areas including Wigan Town Centre, Wigan Pier and Standish remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Wigan is determined against an 8-week statutory target.
Standish (affluent commuter village with a conservation-area core mixing stone and brick with modern estates), Leigh (former cotton and mining town with canal heritage, dense terraces and a town-centre conservation area), Ashton-in-Makerfield (southern coalfield town of brick terraces and interwar suburban growth), Hindley (mining township of terraced streets with a town-centre conservation area), Tyldesley (former mill and mining town of brick terraces with a town-centre conservation area) and Haigh (semi-rural estate village adjoining Haigh Woodland Park with protected historic character) — these are the Wigan pockets our drawings cover most. Heritage designations here include Wigan Town Centre, Wigan Pier, Standish, Haigh Village, Leigh Town Centre and Tyldesley Town Centre. Wigan Council weighs each proposal against Places for Everyone (the Greater Manchester joint plan, effective March 2024) alongside the Wigan Local Plan Core Strategy and the emerging district Local Plan, where the former coalfield legacy of the Wigan Flashes and low-lying mossland brings ground-stability, contamination and ecology constraints to development sites. Converted terraced flats occur across the town centres of Wigan and Leigh, and those units carry no householder permitted-development rights.. On roofs the borough is Welsh slate on the Victorian and Edwardian brick terraces and interlocking concrete tile on the interwar and post-war semis, over Victorian and Edwardian coalfield and millworkers' red-brick terraces, interwar semis and council-estate housing and older stone cores in the estate villages.
Councils do not decide annexes on square metres. They decide whether, once built, the accommodation forms part of one planning unit with the main house or a second one beside it. Wigan Council looks at whether the garden is shared or divided, whether the annexe has its own street access and address, whether the occupier could live there entirely independently, and whether the two households would function as one. That is the whole case, and it is made or lost on the layout.
Wigan is largely Victorian and Edwardian coalfield and millworkers' red-brick terraces, interwar semis and council-estate housing and older stone cores in the estate villages, which shapes the realistic options: converting part of the existing house, extending it, or building a detached unit in the garden. A detached annexe can sometimes sit under Class E as an outbuilding incidental to the enjoyment of the dwellinghouse — but sleeping accommodation is generally not "incidental", so a garden annexe with a bedroom usually needs its own permission rather than relying on outbuilding rights.
In Wigan's conservation areas — including Wigan Town Centre and Wigan Pier — a garden building is also judged on its effect on the character of the area, which limits height and footprint before the use question is reached. Wigan's borough-wide Article 4 direction, in force from August 2025, removes permitted-development rights for the change of use from a house (C3) to a small HMO (C4), so all new HMOs now need planning permission, and localised conservation-area directions add further householder controls.
An annexe almost always needs an application to Wigan Council. Expect one where any of these apply:
We plan the annexe so its relationship to the main house is visible on the page — shared garden, connected access, a layout that reads as one household — and set out the case Wigan Council has to test, rather than leaving the officer to assume the worst.
Below is Wigan Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Wigan approves close to nine in ten planning applications, with its extensive Green Belt, former-coalfield ground conditions and canal-side conservation areas the main constraints on householder schemes. Annexe applications are decided on use as much as design, so the supporting case matters as much as the elevations.
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 Standish, Leigh and Ashton-in-Makerfield, the annexes that succeed keep one shared garden, take access past the main house rather than from the street, and are modest against the host building — single storey where the plot is overlooked, and set back from boundaries. On victorian and edwardian coalfield and millworkers' red-brick terraces, converting an integral garage or a rear ground floor is often approved more readily than a detached garden unit, because the ancillary relationship is self-evident.
A large share of the borough is Green Belt, so extension and outbuilding scale is tightly held on affected plots away from the urban cores. Where Wigan Council grants permission, it commonly attaches a condition tying occupation of the annexe to the main dwelling. That condition is not a problem to be avoided — it is usually the mechanism that makes approval possible, and we draft the application on that basis rather than pretending the annexe is something it is not.
We draw annexes across Wigan. A few of the areas where multigenerational schemes come up most often:
Annexe and granny-flat drawings for Standish — affluent commuter village with a conservation-area core mixing stone and brick with modern estates — planned to stay ancillary and drawn to Wigan Council's policies.
Annexe and granny-flat drawings for Leigh — former cotton and mining town with canal heritage, dense terraces and a town-centre conservation area — planned to stay ancillary and drawn to Wigan Council's policies.
Annexe and granny-flat drawings for Ashton-in-Makerfield — southern coalfield town of brick terraces and interwar suburban growth — planned to stay ancillary and drawn to Wigan Council's policies.
Annexe and granny-flat drawings for Hindley — mining township of terraced streets with a town-centre conservation area — planned to stay ancillary and drawn to Wigan Council's policies.
Annexe and granny-flat drawings for Tyldesley — former mill and mining town of brick terraces with a town-centre conservation area — planned to stay ancillary and drawn to Wigan Council's policies.
Annexe and granny-flat drawings for Haigh — semi-rural estate village adjoining Haigh Woodland Park with protected historic character — planned to stay ancillary and drawn to Wigan Council's policies.
Three similar buildings, three different consents. This is what separates them.
| What you build | Planning status | Key test | What Wigan Council checks |
|---|---|---|---|
| Garden room, no sleeping space | Often Class E permitted development | Incidental to the house | Height, footprint, boundary position |
| Annexe used by the household | Full application, usually with a tie condition | Ancillary use | Shared garden and access, layout |
| Self-contained unit, own access | New dwelling — full application | Separate planning unit | Policy on new homes, amenity, parking |
| Converted garage or ground floor | Often permitted, use still assessed | Whether use changes | Independence of the accommodation |
| Annexe on designated land | Full application | Designation | Character and appearance |
The ancillary/separate-dwelling distinction comes from section 55 of the Town and Country Planning Act 1990; outbuilding limits from the GPDO 2015, Schedule 2, Part 1, Class E.
A fixed process built around how Wigan Council tests the use question as well as the design.
Tell us who the annexe is for and where it would sit on the plot. We confirm designation status and tell you honestly whether the scheme reads as ancillary or as a separate dwelling in Wigan.
We measure the plot, the existing house and the access route, so the shared-garden and shared-access case can be drawn rather than asserted.
Chartered designers develop the annexe to your brief, with the layout, access and garden relationship arranged to support the ancillary case under Wigan Council's policies.
We submit the application with a supporting statement on use, manage validation and case-officer queries, and revise free until Wigan Council decides.
Almost always. Sleeping accommodation is generally not "incidental" to the enjoyment of a house, so it falls outside the outbuilding permitted-development right, and any annexe that could function independently raises a change-of-use question under section 55. In Wigan we prepare a full application to Wigan Council and make the ancillary case explicitly rather than hoping it is not asked.
A shared garden rather than a divided one, access through the main property rather than a separate street entrance, occupation by a member of the same household, and a physical and functional relationship with the main house. Wigan Council weighs those together — no single feature decides it, but a separate front door and a fenced-off garden together usually settle it against you.
Yes, subject to permission. A detached garden annexe is assessed on its scale against the plot, its effect on neighbours and the character of the area, and then on the use question. Keeping it single storey, set in from boundaries and served off the shared garden gives it the best prospect in Wigan, particularly near designated areas such as Wigan Town Centre and Wigan Pier. Wigan Council is the decision-maker.
Commonly, yes — a condition tying occupation of the annexe to the main dwelling, so it cannot be sold or let separately. That is normally what makes approval possible, because it removes the concern that a new independent home is being created without going through housing policy. The condition runs with the land, so it matters at resale, and we explain the implications before you commit. This applies to your Wigan address specifically. Wigan Council is the decision-maker.
Yes. A new annexe is new habitable accommodation, so structure, fire escape, insulation and ventilation all apply, and a detached annexe close to a boundary raises fire-spread requirements as well. Planning and building control are separate consents with separate submissions — we prepare both so the approved design is the one that can actually be built. This applies to your Wigan address specifically. Wigan Council is the decision-maker.
A householder application runs to an eight-week statutory target; where the council treats the annexe as creating a new unit it becomes a minor application with a thirteen-week target instead. Which route applies depends on how the use is characterised, which is precisely why the ancillary case is worth making properly at the outset. This applies to your Wigan address specifically. Wigan Council is the decision-maker.
We quote each Wigan annexe individually, because plot, access and whether you are converting or building new all change the work, and send a fixed, no-obligation quote within one working day. It covers the full drawing pack and supporting statement, with free revisions until Wigan Council approves. Call 020 7864 7245 to start.
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