Annexe and granny-flat drawings for Tandridge homes — designed to stay ancillary to the main house rather than become a separate dwelling, drawn to Tandridge District Council's policies, delivered in days and revised free until your decision.
Tandridge District Council granted 87% of the householder planning decisions it made in its latest published year — level with the 87% England-wide householder average. Metropolitan Green Belt covers around 94% of the district, one of the highest proportions in England, so the presumption against inappropriate development dominates decisions, 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.
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. Tandridge carries at least one Article 4 direction, and conservation areas including Oxted, Limpsfield and Godstone remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Tandridge is determined against an 8-week statutory target.
Oxted (the principal town with railway-era Victorian and Edwardian housing, twentieth-century growth and a conservation area), Caterham (the district's largest settlement, dense Victorian-to-postwar housing across Caterham-on-the-Hill and the Valley), Warlingham (a hilltop commuter village of largely interwar and postwar detached houses and semis), Godstone (a historic green-belt village around a pond and green with a conservation area), Limpsfield (an affluent AONB-edge village of period and large detached stock with a conservation area) and Lingfield (a historic rural village with a medieval core and a conservation area) — these are the Tandridge pockets our drawings cover most. Heritage designations here include Oxted, Limpsfield, Godstone, Bletchingley, Lingfield and Chaldon. Tandridge District Council weighs each proposal against the Tandridge District Core Strategy (adopted 2008) and Local Plan Part 2: Detailed Policies (adopted July 2014), where the Surrey Hills and High Weald National Landscapes (AONBs) affect the district around Limpsfield, Oxted and the south, adding national landscape protection. Converted flats appear around Oxted and Caterham, and none of them hold householder permitted-development rights.. On roofs the borough is dual-pitch tiled roofs on the railway-era terraces and villas and hipped roofs on the interwar and postwar semis, over Victorian and Edwardian and interwar railway-era housing in Oxted and Caterham, postwar suburban semis and detached houses, large detached houses on generous plots at Woldingham and Limpsfield and historic vernacular cottages in the green-belt villages of Godstone, Bletchingley and Lingfield.
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. Tandridge District 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.
Tandridge is largely Victorian and Edwardian and interwar railway-era housing in Oxted and Caterham, postwar suburban semis and detached houses, large detached houses on generous plots at Woldingham and Limpsfield and historic vernacular cottages in the green-belt villages of Godstone, Bletchingley and Lingfield, 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 Tandridge's conservation areas — including Oxted and Limpsfield — 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. Tandridge has Article 4 directions removing permitted-development rights in parts of the district, which owners can check against the council's constraints map before assuming suburban PD rights, and its conservation areas such as Oxted, Limpsfield and Godstone add further character controls.
An annexe almost always needs an application to Tandridge District 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 Tandridge District Council has to test, rather than leaving the officer to assume the worst.
Below is Tandridge District Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Tandridge grants a fair share of applications broadly in line with the national picture, with overwhelming Green Belt coverage and AONB protection the pressures on anything beyond modest householder work. 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 Oxted, Caterham and Warlingham, 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 and interwar railway-era housing in oxted and caterham, 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.
Metropolitan Green Belt covers around 94% of the district, one of the highest proportions in England, so the presumption against inappropriate development dominates decisions. Where Tandridge District 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 Tandridge. A few of the areas where multigenerational schemes come up most often:
Annexe and granny-flat drawings for Oxted — the principal town with railway-era Victorian and Edwardian housing, twentieth-century growth and a conservation area — planned to stay ancillary and drawn to Tandridge District Council's policies.
Annexe and granny-flat drawings for Caterham — the district's largest settlement, dense Victorian-to-postwar housing across Caterham-on-the-Hill and the Valley — planned to stay ancillary and drawn to Tandridge District Council's policies.
Annexe and granny-flat drawings for Warlingham — a hilltop commuter village of largely interwar and postwar detached houses and semis — planned to stay ancillary and drawn to Tandridge District Council's policies.
Annexe and granny-flat drawings for Godstone — a historic green-belt village around a pond and green with a conservation area — planned to stay ancillary and drawn to Tandridge District Council's policies.
Annexe and granny-flat drawings for Limpsfield — an affluent AONB-edge village of period and large detached stock with a conservation area — planned to stay ancillary and drawn to Tandridge District Council's policies.
Annexe and granny-flat drawings for Lingfield — a historic rural village with a medieval core and a conservation area — planned to stay ancillary and drawn to Tandridge District Council's policies.
Three similar buildings, three different consents. This is what separates them.
| What you build | Planning status | Key test | What Tandridge District 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 Tandridge District 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 Tandridge.
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 Tandridge District Council's policies.
We submit the application with a supporting statement on use, manage validation and case-officer queries, and revise free until Tandridge District 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 Tandridge we prepare a full application to Tandridge District 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. Tandridge District 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 Tandridge, particularly near designated areas such as Oxted and Limpsfield. Tandridge District 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 Tandridge address specifically. Tandridge District 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 Tandridge address specifically. Tandridge District 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 Tandridge address specifically. Tandridge District Council is the decision-maker.
We quote each Tandridge 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 Tandridge District Council approves. Call 020 7864 7245 to start.
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