1A, Washington Road, London, SW13 9BG Data via plota.co.uk

PA26/2307 - Householder Application Approved
Extensions & alterations

Proposal

Single-storey extension. New mansard roof extension with dormer windows. Existing single glazed windows to be replaced with double-glazed casement windows. Façade alterations. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
1 Jul 2026
✓
Consultation
10 Jul 2026
✓
Approved
20 Aug 2026

Approved on 20 Aug 2026 · Delegated Decision · Last checked 24 Aug 2026

Documents

View the documents on the council's website ↗

Site constraints 9

Flood zone 3, rivers and sea
High chance: a 1 in 100 or greater annual chance from rivers, or 1 in 200 from the sea. Any development here needs a flood risk assessment. Defences are not counted.
The Environment Agency flood map for planning. Homes in zone 3 must also pass the sequential test. Surface water flooding is a separate map.
Flood map ↗
Castelnau conservation area
Demolition needs planning permission and permitted development is restricted.
The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.
Council document ↗
National infrastructure project: Thames Tideway Tunnel
The site is inside the project boundary. Waste water treatment, decided. The project page says whether consent was granted.
Nationally significant infrastructure projects (power stations, electricity lines, pipelines, major roads and railways, harbours, airports and reservoirs) are consented by a Secretary of State under the Planning Act 2008, after an examination by the Planning Inspectorate, rather than by the council. The boundary is the one the Inspectorate consults on and can change as the scheme does. Projects are shown within 2 km of the site.
Planning Inspectorate project page ↗
Air quality management area: Richmond AQMA
The council has declared the area as failing an air quality objective.
Schemes that add traffic, parking or combustion plant are assessed against the area's action plan and may need an air quality assessment.
Council record ↗
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 129 m away: Barn Elms Wetland Centre 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
1 listed building within 150 m; Inside the Richmond upon Thames built-up area; Public transport access: PTAL 2 (poor), TfL 2023, for the 100 m square.
Not affected
Not green belt · No scheduled monument at the site

Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, the Planning Inspectorate, Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) 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 £2,090,000 in July 2023. Terraced house, freehold.

17 July 2023£2,090,000

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

Building

Floor area153 m² (1,647 sq ft)
Energy ratingD (67 out of 100), could reach B
PropertyDetached house, 6 habitable rooms
Built1983 to 1990
HeatingBoiler and radiators, mains gas
WallsCavity wall, as built, insulated (assumed)

From the energy performance certificate lodged in March 2023, the latest held for this property. The building may have changed since. View the certificate

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Other new applications on this street

12 Aug 2026Approved

50, Washington Road, London, SW13 9BH

Extend width of the dormer to become set back 200mm from the side wall. Setback

PA26/2799

Nearby new applications

2 Oct 2026Approved

83, Castelnau, London, SW13 9RT

5 DAY DANGEROUS TREE NOTICE - Silver Birch (Betula pendula) - fell to ground le...

PA26/3394
28 Sept 2026Pending

92, Madrid Road, London, SW13 9PG

The proposed works comprise the demolition of the existing rear projection and i...

PA26/3317
28 Sept 2026Pending

92, Madrid Road, London, SW13 9PG

The proposed works comprise the installation of a new front dormer, replacement ...

PA26/3318
25 Sept 2026Pending

128A, The Coach House, Castelnau, London, SW13 9ET

Details pursuant to condition 10 Ecologicial Implact Assessment of planning refe

PA26/3314
24 Sept 2026Pending

91, Lonsdale Road, London, SW13 9DA

Front storage shed

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15 Sept 2026Pending

38 Madrid Road Barnes London SW13 9PG

1) Modification of the roof form to include mansard roof to the rear with 2No.

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Important details

Council
Richmond upon Thames
Application type
Householder Application
Postcode
SW13 9BG
Received
1 Jul 2026
Validated
1 Jul 2026
Ward
Barnes Ward [BRN]
Case officer
Show
Target decision
26 Aug 2026
Decision
Granted Permission
Decision date
20 Aug 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Jones Lambell Ellis Studio

How this decision compares

Decided in 50 days from validation, about the council's usual 48 days. Approved, as 86% of extensions here are.

78%decided within 8 weeks
86%approved
1,177decided in the last year

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

Consultation & key dates

Alt. reference
PP-14752490
Comments by
31 Jul 2026
Site or press notice
10 Jul 2026
Statutory expiry
23 Jul 2026

Historical activity at this location

25 nearby applications on record - archival context, not part of the live application.

Within ~100m

Nearby activity

2025 Approved
86, CASTELNAU, LONDON, RICHMOND UPON THAMES, SW13 9EU
Proposed demolition of the existing rear extension and its replacement with a contemporar…
PA25/4095
2025 Approved
86, CASTELNAU, LONDON, RICHMOND UPON THAMES, SW13 9EU
Proposed demolition of the existing rear extension and its replacement with a contemporar…
PA25/4096
2025 Approved
96, Castelnau, London, SW13 9EU
Rear T3 Magnolia x 1 (Magnolia spp) This magnolia has started to outgrow itslocation and…
PA25/4311
2025 Approved
88, CASTELNAU, LONDON, RICHMOND UPON THAMES, SW13 9EU
T2 Robinia Pseudoacacia: Reduce by 2-3m from the height and width to shape Routine mainte…
PA25/3974
2025 Approved
80 Castelnau Barnes London SW13 9EX
T1 Holly (x1) Reduce height and width by 50cm. Final height 5m and width 4m. Reason: To p…
PA25/3577
2025 Refused
86, CASTELNAU, LONDON, RICHMOND UPON THAMES, SW13 9EU
Part retrospective application for the erection of a 1m planter in the rear garden.
PA25/3234
2025 Withdrawn
86 Castelnau Barnes
Replacement single storey rear extension.
PA25/2327
2024 Approved
70 Castelnau Barnes London SW13 9EX
T1 - x1 poplar rear garden, reduce and reshape canopy back to previous reduction points b…
24/T0352/TCA
2024 Approved
78 Castelnau Barnes London SW13 9EX
Proposed rear ground floor extension and garden building. Second floor rear juliet balcon…
24/0978/HOT
2023 Approved
96 Castelnau Barnes London SW13 9EU
To reduce 1 x Magnolia in the neighbours garden by approximately 20% approx 1m all over l…
23/T0908/TCA
2022 Approved
92 Castelnau Barnes London SW13 9EU
2X Lime - to be crown reduced by approx 2m leaving height 12m and width 5m Sycamore - To…
22/T0438/TCA
2022 Approved
74 Castelnau Barnes London SW13 9EX
5 DAY DANGEROUS TREE NOTICE Removal of large Lime at rear of property.
22/T0311/TCA
2021 Approved
72 Castelnau Barnes London SW13 9EX
Details pursuant to conditions U0107544 - Details of Ecological Enhancement, and U0107547…
21/1846/DD01
2021 Approved
76 Castelnau Barnes London SW13 9EX
Magnolia - (T1) fell due to close proximity to wall Sorbus - (T2) fell due to poor condit…
21/T0829/TCA
2021 Refused
94 Castelnau Barnes London SW13 9EU
Internal alterations at lower ground floor level.
21/0631/LBC
2021 Withdrawn
Ground Floor Flat 72 Castelnau Barnes London
Construction of a new swimming pool to the back garden of the property.
21/0121/FUL
2020 Approved
88 Castelnau Barnes London SW13 9EU
T1 - acacia reduce by 2,5m from all aspects - Routine maintenance to a finished height of…
20/T1165/TCA
2020 Approved
88 Castelnau Barnes London SW13 9EU
Dangerous DD notice - Lime tree - Fell - enforcing the long term retention of the Gannode…
20/T1171/TCA
2020 Approved
76 Castelnau Barnes London SW13 9EX
Rear and Side Ground Floor Extension and Rear First Floor Extension.
20/2105/HOT
2020 Withdrawn
Ground Floor Flat 72 Castelnau Barnes London SW13 9EX
Construction of a new swimming pool to the back garden of the property.
20/1517/FUL
2017 Approved
88 Castelnau Barnes London SW13 9EU
Installation of handrail to one side of the front steps.
17/2123/LBC
2017 Approved
96 Castelnau Barnes London SW13 9EU
Replacement of rear timber frame windows and doors to metal sliding doors at lower ground…
17/1289/LBC
2017 Approved
96 Castelnau Barnes London SW13 9EU
Replacement of rear timber frame windows and doors to metal sliding doors at lower ground…
17/1288/HOT
2017 Approved
80 Castelnau Barnes London SW13 9EX
T5 - Tree of Heaven - Remove
17/T0109/TCA
2016 Approved
80 Castelnau Barnes London SW13 9EX
T1 - Yew - Reduce crown by 25% (reduce height and width by up to 1m) and lift crown to 3m…
16/T0841/TCA
Richmond upon Thames
Planning Authority Score
4.4/10
Below average
#182 of 296 councils
Relevant to this application:
Householder decisions

Richmond upon Thames ranks #130 out of 296 councils for householder decision speed. Richmond upon Thames is also one of the strictest councils - it refuses more householder applications than almost any other, with only 82% approved vs 90% nationally.

One of the strictest councils
only 82% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Richmond upon Thames decision statistics
Based on MHCLG data, the year to March 2026
81%
Overall approval rate
Below avg (87%) #257 of 296
82%
Householder approved
Below avg (90%) #268 of 296
69%
Decided in 8 weeks
Above avg (63%) #130 of 296
35%
Extended time limit
Below avg (41%) #104 of 296
68%
Minor dwellings approved
181 decided (1-9 homes)
100%
Major dwellings approved
3 decided (10+ homes)
47%
Change of use approved
17 decided
1,888
Total decisions
358 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.

Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use

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.