27 Dillmount Drive Walton-On-Thames Surrey KT12 2FJ Data via plota.co.uk

2026/1783 - Householder Application Registered
Extensions & alterations

Proposal

Construction of a single-storey rear infill extension and conversion of garage into habitable living space. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
22 Jul 2026
✓
Validated
14 Aug 2026
Decision
Expected by 9 Oct 2026

Under consideration

No decision has been issued yet. Plota predicts a decision around 9 Oct 2026, from Elmbridge's recent extensions.

Documents

View the documents on the council's website ↗

Site constraints 7

Green belt: London
Inappropriate development needs very special circumstances.
Green belt policy allows a short list of exceptions, such as limited extensions and replacement buildings. Anything else needs very special circumstances that clearly outweigh the harm. Some green belt land can count as grey belt, where it does not strongly serve the green belt's purposes. The council decides this in its green belt assessment or on each application, so we do not mark it here.
Read the government guidance ↗
In flood zones plus climate change
Inside the extent flood zones 2 and 3 could reach with climate change: the Central allowance for the 2080s on rivers, the Upper End allowance for sea level rise to 2125. From rivers. Defences are not counted.
The Environment Agency flood map for planning. Councils use it to decide when a flood risk assessment and the sequential test are needed. It is indicative and does not show whether a particular property will flood.
Flood map ↗
Special protection area about 113 m away: South West London Waterbodies
Work nearby can need a habitats assessment.
Harm to a protected site is only accepted where there is no alternative and an overriding public interest.
Habitat network: Network Enhancement Zone 2
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
SSSI about 113 m away: Knight & Bessborough Reservoirs SSSI
Natural England may need consulting, depending on what is proposed.
Sites of special scientific interest are the best wildlife and geological sites in the country. Development likely to harm one is rarely permitted.
Also on the record
Inside the Walton-on-Thames built-up area; Natural England's Provisional ALC map (1:250,000, 1970s) had this area as grade 1, but it predates the buildings here and the current map does not class it as farmland.
Not affected
Outside flood zones 2 and 3 · No scheduled monument at the site

Checked on 6 October 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. Historic England, the Environment Agency, Natural England and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

Sales history 1

Last sold for £495,000 in January 2021. Semi-detached house, freehold.

22 January 2021£495,000New build

Sale prices from HM Land Registry's price paid record, matched to this application by its address.

Building

Floor area82 m² (883 sq ft)
Energy ratingB (84 out of 100), could reach A
PropertySemi-detached house
Built2019
HeatingBoiler and radiators, mains gas
WallsAverage thermal transmittance 0.26 W/m²K

From the energy performance certificate lodged in December 2020, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate

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Important details

Council
Elmbridge
Application type
Householder Application
Postcode
KT12 2FJ
Received
22 Jul 2026
Validated
14 Aug 2026
Ward
Walton North Ward

Decision outlook

Day 56 of the 56-day target. Elmbridge usually decides extensions by day 56.

Day 560 days to the 56-day target
59%decided within 8 weeks
79%approved
944decided in the last year

Plota live figures for extensions decided by Elmbridge in the last twelve months, from validation. Elmbridge decision record →

Historical activity at this location

27 previous applications on record - archival context, not part of the live application.

This property

Previous applications at this address

2023 Approved
Alteration to fenestration and rooflights.
2023/0709
2023 Approved
Alteration to fenestration and rooflights.
2023/0709
Within ~100m

Nearby activity

2025 Approved
6 Grant Avenue Walton-On-Thames Surrey KT12 2FL
Rear dormer window and front rooflight.
2025/0885
2025 Approved
6 Grant Avenue Walton-On-Thames Surrey KT12 2FL
Rear dormer window and front rooflight.
2025/0885
2024 Approved
21 Grant Avenue Walton-On-Thames Surrey KT12 2FL
Roof extension and rooflights.
2024/1775
2024 Approved
21 Grant Avenue Walton-On-Thames Surrey KT12 2FL
Roof extension and rooflights.
2024/1775
2024 Approved
291 Terrace Road Walton-On-Thames Surrey KT12 2EF
Single-storey side/rear extension and front porch following demolition of existing rear c…
2024/0891
2024 Approved
291 Terrace Road Walton-On-Thames Surrey KT12 2EF
Single-storey side/rear extension and front porch following demolition of existing rear c…
2024/0891
2024 Approved
277A Terrace Road Walton-On-Thames Surrey KT12 2EF
First-floor and single storey side infill extension and alterations to fenestration follo…
2024/0259
2024 Approved
277A Terrace Road Walton-On-Thames Surrey KT12 2EF
First-floor and single storey side infill extension and alterations to fenestration follo…
2024/0259
2024 Approved
277A Terrace Road Walton-On-Thames Surrey KT12 2EF
Rear dormer window and front rooflights.
2024/0258
2024 Approved
277A Terrace Road Walton-On-Thames Surrey KT12 2EF
Rear dormer window and front rooflights.
2024/0258
2023 Refused
8 Sherman Avenue Walton-on-Thames Surrey KT12 2FN
Retrospective application for new driveway.
2023/2425
2023 Refused
8 Sherman Avenue Walton-on-Thames Surrey KT12 2FN
Retrospective application for new driveway.
2023/2425
2022 Approved
37 Grant Avenue Walton-On-Thames Surrey KT12 2FL
Front and rear rooflights.
2022/0399
2022 Approved
37 Grant Avenue Walton-On-Thames Surrey KT12 2FL
Front and rear rooflights.
2022/0399
2022 Withdrawn
Garage Block North of 2 To 9 Sunnyside Walton-on-Thames KT12 2ET
Two pairs of semi-detached two-storey houses with associated parking and landscaping foll…
2022/1271
2022 Withdrawn
Garage Block North of 2 To 9 Sunnyside Walton-on-Thames KT12 2ET
Two pairs of semi-detached two-storey houses with associated parking and landscaping foll…
2022/1271
2021 Refused
Land North of Bramble Cottage Sunnyside Walton-On-Thames Surrey KT12 2ET
Detached two-storey house with rooms in the roof space.
2021/1730
2021 Approved
5 Sunnyside Walton-On-Thames Surrey KT12 2ET
Single-storey rear garage and boundary wall following demolition of existing garage.
2021/3826
2021 Approved
28 Grant Avenue Walton-On-Thames Surrey KT12 2FL
Partial conversion of garage into living space and alterations to fenestration.
2021/2390
2021 Approved
285 Terrace Road Walton-On-Thames Surrey KT12 2EF
Single-storey side extension and single-storey rear extension.
2021/2118
2018 Approved
285 Terrace Road Walton-On-Thames Surrey KT12 2EF
Hip-to-gable roof extension incorporating rear dormer window and front roof lights follow…
2018/2883
2017 Approved
Rivernook Farm Sunnyside Walton-On-Thames Surrey KT12 2ET
Development comprising 97 residential units (79 houses and 18 flats) with associated gara…
2017/2258
2017 Approved
Rivernook Farm Sunnyside Walton-On-Thames Surrey KT12 2ET
Development comprising 97 residential units (79 houses and 18 flats) with associated gara…
2017/2258
2017 Approved
Rivernook Farm Sunnyside Walton-On-Thames Surrey KT12 2ET
Screening opinion as to whether an Environmental Impact Assessment is required for a prop…
2017/1809
2017 Approved
Rivernook Farm Sunnyside Walton-On-Thames Surrey KT12 2ET
Screening opinion as to whether an Environmental Impact Assessment is required for a prop…
2017/1809
Elmbridge
Planning Authority Score
2.6/10
Poor
#247 of 296 councils
Relevant to this application:
Householder decisions

Elmbridge ranks #195 out of 296 councils for householder decision speed. Elmbridge is also one of the strictest councils - it refuses more householder applications than almost any other, with only 79% approved vs 90% nationally.

One of the strictest councils
only 79% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Elmbridge decision statistics
Based on MHCLG data, the year to March 2026
77%
Overall approval rate
Below avg (87%) #277 of 296
79%
Householder approved
Below avg (90%) #281 of 296
57%
Decided in 8 weeks
Below avg (63%) #195 of 296
44%
Extended time limit
Above avg (41%) #178 of 296
68%
Minor dwellings approved
195 decided (1-9 homes)
60%
Major dwellings approved
15 decided (10+ homes)
72%
Change of use approved
32 decided
1,358
Total decisions
314 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings

Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.