18 Radnor Gardens Twickenham TW1 4NA Data via plota.co.uk

PA26/1782 - Householder Application Approved
Extensions & alterations

Proposal

Infill one storey rear extension and rear dormer roof extension Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
2 Jun 2026
✓
Approved
11 Aug 2026

Approved on 11 Aug 2026 · Delegated Decision · Last checked 11 Aug 2026

Documents

View the documents on the council's website ↗

Site constraints 5

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 ↗
Registered park or garden 95 m away: Pope's Garden
Its setting is a consideration for work nearby.
Registered parks and gardens, battlefields, world heritage sites and protected wrecks are designated heritage assets: harm needs clear and convincing justification.
Historic England ↗
Also on the record
2 listed buildings within 150 m; Local nature reserve 452 m away: Ham Lands; Inside the Richmond upon Thames built-up area.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 11 September 2026. 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.

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Other new applications on this street

23 Jul 2026Approved

2 Radnor Gardens Twickenham TW1 4NA

Erection of rear roof dormer extension with the addition of two rooflights to th

PA26/2565

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26, Laurel Avenue, Twickenham, TW1 4JA

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Important details

Council
Richmond upon Thames
Application type
Householder Application
Postcode
TW1 4NA
Received
2 Jun 2026
Validated
2 Jun 2026
Ward
South Twickenham Ward [STT]
Case officer
Show
Target decision
28 Jul 2026
Decision
Granted Permission
Decision date
11 Aug 2026
Decision level
Delegated Decision
Applicant
Show
Agent
EBS Project Management

How this decision compares

Decided in 70 days from validation, 22 days slower than Richmond upon Thames's median of 48 for extensions. Approved, as 87% of extensions here are.

79%decided within 8 weeks
87%approved
1,012decided 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-14952412
Statutory expiry
23 Jun 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
50 Cross Deep Gardens Twickenham TW1 4QU
Rear dormer roof extension and roof lights to the front roof slope.
PA25/3769
2025 Approved
50 Cross Deep Gardens Twickenham TW1 4QU
single storey rear extension (3.5m depth, 3m eaves height, 3m overall height)
PA25/3441
2024 Approved
46 And 48 Cross Deep Gardens Twickenham TW1 4QU
Ground floor rear extension and external insulation and rendering for No.46. New tiled ca…
24/3184/HOT
2025 Approved
45 Cross Deep Gardens Twickenham TW1 4QZ
Single Storey Rear Extension
25/0107/HOT
2024 Approved
46 Cross Deep Gardens Twickenham TW1 4QU
Proposed rear dormer and skylights to the front
24/3183/PS192
2024 Refused
45 Cross Deep Gardens Twickenham TW1 4QZ
Ground Floor Rear Extension
24/2871/PS192
2023 Approved
Playing Field Grotto Road Twickenham
T1 - Prune the 1 x Sycamore tree located T1 to the following specifications: - 2m Reducti…
23/T0494/TCA
2023 Approved
39 Cross Deep Gardens Twickenham TW1 4QZ
Single Storey Rear Extension (5.00m depth, 2.72m eaves height, 3.70m overall height)
23/1782/PDE
2023 Approved
39 Cross Deep Gardens Twickenham TW1 4QZ
Hip to gable , rear dormer and front porch.
23/1287/PS192
2023 Refused
39 Cross Deep Gardens Twickenham TW1 4QZ
Single Storey Rear Extension (5.33m depth, 2.72m eaves height, 3.70m overall height)
23/1297/PDE
2022 Approved
60 Radnor Road Twickenham TW1 4ND
proposing to install a minimal 1.5m internal extension to the existing single storey gabl…
22/2321/HOT
2022 Approved
60 Radnor Road Twickenham TW1 4ND
Hip to gable and rear dormer roof extensions. Rooflights to front elevation
22/2385/PS192
2022 Approved
45 Cross Deep Gardens Twickenham TW1 4QZ
Hip to gable and rear dormer roof extensions. Rooflights to front elevation. Window at ro…
22/2242/PS192
2021 Approved
50 Tennyson Avenue Twickenham TW1 4QY
Loft extension comprising rear facing dormer and 2no. front facing roof lights.
21/3978/PS192
2021 Approved
50 Tennyson Avenue Twickenham TW1 4QY
Single storey rear extension.
21/3979/HOT
2021 Approved
35 Tennyson Avenue Twickenham TW1 4QX
Demolition of existing rear garden outbuilding and the construction of a new outbuilding.
21/3144/HOT
2021 Approved
48 Cross Deep Gardens Twickenham TW1 4QU
single storey rear extension (4.00m depth 3.00m eaves height 3.20m maximum height)
21/1530/PDE
2020 Approved
51 Cross Deep Gardens Twickenham TW1 4QZ
Remove existing garage and shed and replace with a new garage and a garden room
20/3696/PS192
2020 Approved
53 Cross Deep Gardens Twickenham TW1 4QZ
Single storeay rear extesnion, 4m in depth, 3.8m in height and 2.4m in height to eaves.
20/3530/PDE
2020 Approved
34 Tennyson Avenue Twickenham TW1 4QY
Single storey rear extension (6m depth, 3m eaves height, 3.76m maximum height)
20/0833/PDE
2017 Approved
43 Cross Deep Gardens Twickenham TW1 4QZ
Hip to gable, rear dormer and front porch extensions, new window on second floor side ele…
17/2935/PS192
2017 Approved
STREET RECORD Grotto Road Twickenham
T1 - Sycamore - Reduce back overhang from No.30A Radnor Road by 1.5-2m
17/T0328/TCA
2016 Approved
36 Tennyson Avenue Twickenham TW1 4QY
Single storey rear extension.
16/1910/HOT
2016 Withdrawn
36 Tennyson Avenue Twickenham TW1 4QY
Proposed single storey rear extension (4.9m in depth, 2.8m to the eaves/overall height).
16/1362/PDE
2016 Approved
17 Cross Deep Gardens Twickenham TW1 4QZ
Erection of a single storey detached Log Cabin to the rear of the property.
16/0921/HOT
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