Annexe and granny-flat drawings for Strutt's Park homes — designed to stay ancillary to the main house rather than become a separate dwelling, drawn to Derby City Council's policies, delivered in days and revised free until your decision.
Derby City Council granted 93% of the householder planning decisions it made in its latest published year — 6 points above the 87% England-wide householder average. The Strutts Park conservation area controls the villa building line, boundary walls and roof form, so extensions must respect the planned Victorian layout, which is where a policy-literate drawing pack earns its keep. Its dominant Victorian (1837–1901) and Edwardian (1901–1910) 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. Strutt's Park carries at least one Article 4 direction, and conservation areas including Strutts Park, Little Chester and Darley Abbey remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Strutt's Park is determined against an 8-week statutory target.
Strutt's Park (an early planned Victorian suburb of villas and terraces on the west bank of the Derwent), Kedleston Road (large period houses and university buildings running north-west from the centre), Duffield Road (substantial Victorian and Edwardian houses on a leafy arterial), West End (dense Victorian terraces between Friar Gate and the river), Five Lamps (the junction district of tall Victorian townhouses at the top of the West End) and Darley Grove (riverside terraces linking Strutt's Park to Darley Abbey) — these are the Strutt's Park pockets our drawings cover most. Heritage designations here include Strutts Park, Little Chester and Darley Abbey. Derby City Council weighs each proposal against the Derby City Local Plan Part 1 (Core Strategy) and Part 2, where proximity to the University of Derby drives HMO demand, which the Article 4 direction and amenity policy resist through the clustering and sandwiching tests. Larger houses around Kedleston Road and Duffield Road are commonly split into flats, none of which hold householder permitted-development rights.. On roofs the borough is gabled and hipped slate roofs on the Victorian villas and pitched roofs on the brick terraces, over Victorian villas and semi-detached houses laid out from the 1830s, Victorian and Edwardian brick terraces and larger period houses converted into flats near the university and river.
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. Derby City 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.
Strutt's Park is largely Victorian villas and semi-detached houses laid out from the 1830s, Victorian and Edwardian brick terraces and larger period houses converted into flats near the university and river, 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 Strutt's Park's conservation areas — including Strutts Park and Little Chester — 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. Strutt's Park lies in Darley Ward inside the Ring Road, where Derby's HMO Article 4 direction removes the permitted right to convert dwellings to small HMOs, and the Strutts Park conservation area protects its Victorian villa streets.
An annexe almost always needs an application to Derby City 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 Derby City Council has to test, rather than leaving the officer to assume the worst.
Below is Derby City Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Derby approves most applications it determines, and in Strutt's Park the defining tensions are villa-suburb conservation detail, HMO pressure near the university, and World Heritage Site setting along the Derwent. 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 Strutt's Park, Kedleston Road and Duffield Road, 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 villas and semi-detached houses laid out from the 1830s, 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.
The Strutts Park conservation area controls the villa building line, boundary walls and roof form, so extensions must respect the planned Victorian layout. Where Derby City 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 Strutt's Park. A few of the areas where multigenerational schemes come up most often:
Annexe and granny-flat drawings for Strutt's Park — an early planned Victorian suburb of villas and terraces on the west bank of the Derwent — planned to stay ancillary and drawn to Derby City Council's policies.
Annexe and granny-flat drawings for Kedleston Road — large period houses and university buildings running north-west from the centre — planned to stay ancillary and drawn to Derby City Council's policies.
Annexe and granny-flat drawings for Duffield Road — substantial Victorian and Edwardian houses on a leafy arterial — planned to stay ancillary and drawn to Derby City Council's policies.
Annexe and granny-flat drawings for West End — dense Victorian terraces between Friar Gate and the river — planned to stay ancillary and drawn to Derby City Council's policies.
Annexe and granny-flat drawings for Five Lamps — the junction district of tall Victorian townhouses at the top of the West End — planned to stay ancillary and drawn to Derby City Council's policies.
Annexe and granny-flat drawings for Darley Grove — riverside terraces linking Strutt's Park to Darley Abbey — planned to stay ancillary and drawn to Derby City Council's policies.
Three similar buildings, three different consents. This is what separates them.
| What you build | Planning status | Key test | What Derby City 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 Derby City 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 Strutt's Park.
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 Derby City Council's policies.
We submit the application with a supporting statement on use, manage validation and case-officer queries, and revise free until Derby City 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 Strutt's Park we prepare a full application to Derby City 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. Derby City 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. This applies to your Strutt's Park address specifically.
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 Strutt's Park, particularly near designated areas such as Strutts Park and Little Chester. Derby City 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 Strutt's Park address specifically. Derby City 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 Strutt's Park address specifically. Derby City 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 Strutt's Park address specifically. Derby City Council is the decision-maker.
We quote each Strutt's Park 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 Derby City Council approves. Call 020 7864 7245 to start.
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