109, Castelnau, London, SW13 9EL Data via plota.co.uk

PA26/2751 - Householder Application Registered
Extensions & alterations

Proposal

Replacement rear extension, addition of a side dormer, widening of the front and rear dormers, alterations to the window glazing, to increase the height of the coach house extension, and internal alterations to layout and features at the lower ground, upper ground, first and second floors. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
7 Aug 2026
✓
Validated
11 Aug 2026
✓
Consultation
21 Aug 2026
Decision
Expected by 2 Oct 2026

Under consideration

No decision has been issued yet. Plota predicted a decision around 9 Oct 2026; it is now day 59.

The consultation period closed on 11 Sept 2026.

Documents

View the documents on the council's website ↗

Site constraints 9

Grade II listed: 91-125, CASTELNAU (See details for further address information)
List entry 1358080 · 16 m away
Listed building consent is needed for work that affects the special interest of a listed building, inside or out, on top of planning permission. Setting can be a consideration for buildings nearby; there is no fixed radius.
Historic England ↗
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 111 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
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 2

Last sold for £5,950,000 in November 2025. Detached house, freehold.

24 November 2025£5,950,000Recorded as a transfer outside a standard sale
20 September 1999£1,800,000

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

Building

Floor area484 m² (5,210 sq ft)
Energy ratingC (75 out of 100)
PropertyMid-terrace house, 9 habitable rooms
BuiltBefore 1900
HeatingBoiler with radiators and underfloor heating, mains gas
WallsSystem built, as built, insulated (assumed)

From the energy performance certificate lodged in August 2025, the latest held for this property. The building may have changed since. View the certificate

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Important details

Council
Richmond upon Thames
Application type
Householder Application
Postcode
SW13 9EL
Received
7 Aug 2026
Validated
11 Aug 2026
Ward
Barnes Ward [BRN]
Case officer
Show
Target decision
2 Oct 2026
Applicant
Show
Agent
HÁM Interiors

Decision outlook

Day 59, past the statutory target. 94% of extensions in Richmond upon Thames are decided within thirteen weeks, which runs to 10 Nov 2026; extensions of time are common, and the council need not decide on the day. Last seen undecided on 7 Oct 2026.

Day 593 days past the 56-day target
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-15084449
Comments by
11 Sept 2026
Site or press notice
21 Aug 2026
Statutory expiry
16 Oct 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
96, Castelnau, London, SW13 9EU
Rear T3 Magnolia x 1 (Magnolia spp) This magnolia has started to outgrow itslocation and…
PA25/4311
2025
102A, Castelnau, London, SW13 9EU
Replace existing glazing and joinery to front and rear elevations. Apply central stucco p…
PA26/0020
2025 Approved
24, Devereux Lane, London, SW13 8DA
Erection of extension to connect the main dwelling to the adjacent garage.
PA25/4241
2025
102A, Castelnau, London, SW13 9EU
Replace existing glazing and joinery to front and rear elevations. Apply central stucco p…
PA25/4158
2025 Approved
114 Castelnau, Barnes
Lower ground floor rear in-fill extension and kitchen refurbishment.
PA25/2495
2025 Approved
114 Castelnau, Barnes
Lower ground floor rear in-fill extension and kitchen refurbishment.
PA25/2500
2024 Approved
98 Castelnau Barnes London SW13 9EU
T1 - Cedar - Raise crown by 3m and reduce width 3m leaving canopy height of 25m and width…
24/T0859/TCA
2024 Approved
122 Castelnau Barnes London SW13 9EU
Details in pursuant of condition U0148964 (Terrace Privacy Screen)of planning permission…
22/2522/DD04
2024 Approved
122 Castelnau Barnes London SW13 9EU
Details pursuant to conditions BD12 - Details - Materials to be approved, U0148960 - Exte…
22/2522/DD03
2024 Approved
122 Castelnau Barnes London SW13 9EU
Details pursuant to condition U0148967 - Engineering Details, of listed building consent…
22/2523/DD01
2024 Approved
122 Castelnau Barnes London SW13 9EU
Details pursuant to conditions DV49A - Construction Management Plan,; U0148959 - Bat Roos…
22/2522/DD01
2024 Approved
122 Castelnau Barnes London SW13 9EU
Details pursuant to condition U0148957 - Arboricultural Method Statement, of planning per…
22/2522/DD02
2024 Approved
108 Castelnau Barnes London SW13 9EU
T1 - Robinia: Height 23m, spread 15m, dbh 70cm; Too large for site, ivy covered; Prune ba…
24/T0470/TCA
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
2023 Approved
98 Castelnau Barnes London SW13 9EU
Rear Garden (T1) - To lift the lower branches from the conifer and reduce in height, remo…
23/T0907/TCA
2023 Approved
24 Devereux Lane Barnes London SW13 8DA
Removal of 3 existing AC units and replacement with 1 new AC unit and acoustic enclosure.
23/1803/HOT
2023 Approved
24 Devereux Lane Barnes London SW13 8DA
Replacement single storey rear extension, conversion of the garage into an ancillary dome…
23/1096/HOT
2023 Withdrawn
84 Castelnau Barnes London SW13 9EU
T2 Cypress sp. (x1) - Fell to ground level. Reason: Client is landscaping garden and plan…
23/T0099/TCA
2022 Approved
122 Castelnau Barnes London SW13 9EU
Demolition of existing modern extension to rear of coach house and external staircase. Fo…
22/2523/LBC
2022 Approved
122 Castelnau Barnes London SW13 9EU
Demolition of existing modern extension to rear of coach house and external staircase. Fo…
22/2522/HOT
2016 Approved
106 Castelnau Barnes London SW13 9EU
Internal alterations to Lower Ground Floor utility room and First Floor WC and rear bedro…
16/4833/LBC
2016 Approved
110 Castelnau Barnes London SW13 9EU
T1 - Lime - Reduce to previous points of reduction by reducing the canopy by approx.3m
16/T0891/TCA
2016 Approved
114 Castelnau Barnes London SW13 9EU
T1 - Plane - Reduce height by approx. 3m and reduce all side laterals by 2m
16/T0874/TCA
2016 Approved
108 Castelnau Barnes London SW13 9EU
T1 - Rowan - Remove
16/T0911/TCA
2016 Approved
104 Castelnau Barnes London SW13 9EU
T1 - Sycamore - Lift by 4m over driveway
16/T0339/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.