4 Blenheim Avenue Southampton SO17 1DU Data via plota.co.uk

26/00411/FUL - Full Application Approved
DemolitionExtensions & alterations

Proposal

Erection of a single storey rear extension following demolition of existing conservatory, alterations to side window/door, front boundary wall and resurfacing of driveway. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
10 Apr 2026
✓
Consultation
27 Apr 2026
✓
Approved
5 Jun 2026

Approved on 5 Jun 2026 · Delegated Decision · Last checked 8 Sept 2026

Documents 4

Decision & officer reports 1

PDF Delegated Report Delegated Report · 5 Jun 2026 View ↗

Statements & assessments 1

PDF HERITAGE Supporting Information · 27 Apr 2026 View ↗

Application forms 1

PDF APPLICATION FORM - WITHOUT PERSONAL DATA Application Form · 10 Apr 2026 View ↗

Other documents 1

PDF STRUCTURAL Supporting Information · 27 Apr 2026 View ↗

All documents on the council site ↗

Site constraints 9

Nutrient neutrality catchment: Solent: Includes Chichester and Langstone Harbours SPA/Ramsar, Solent and Southampton Water SPA/Ramsar, Solent Maritime SAC, Portsmouth Harbour SPA/Ramsar
New homes and overnight accommodation must show nutrient neutrality before approval.
Natural England advice: extra wastewater in these catchments harms protected habitats, so schemes must offset their nutrient load, usually through credits.
Oakmount Triangle conservation area
Also Oakmount Triangle. 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.
Article 4 direction
HMO. Named permitted development rights are withdrawn here.
An Article 4 direction withdraws particular permitted development rights, so work that would normally need no application needs one here. Not every council has published its directions.
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 167 m away: Southampton Common 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
Tree preservation order 9 m away: The Southampton (Westwood Road - Winn Road) TPO 1972; Inside the Southampton built-up area; Priority habitat 41 m away: Deciduous woodland; Open access land 41 m away: Access Land - Combined Open Country, Registered Common Land and Section 16 Dedicated Land. MoD Byelaw, Section 28 Exclusions, Racecourses and Aerodromes and ECP Margin have been removed..
Not affected
Outside flood zones 2 and 3 · Not green belt · No listed building 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.

Sales history 1

Last sold for £905,000 in June 2022. Detached house, freehold.

24 June 2022£905,000

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

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Other new applications on this street

26 Jun 2026Approved

26 Blenheim Avenue Southampton SO17 1DU

Replacement footpath.

26/00664/FUL
1 Sept 2026Pending

31 Blenheim Avenue Southampton SO17 1DW

T5 - mature ash tree in garden of 31 Blenheim Avenue next to NW boundary. Remove...

26/00061/TCA
1 Sept 2026Pending

33 Blenheim Avenue Southampton SO17 1DW

T1 - mature yew tree in garden next to NW boundary wall. All over trim to reduce...

26/00053/TCA
1 Sept 2026Pending

37 Blenheim Avenue Southampton SO17 1DW

T3 - mature oak tree in garden of 37 Blenheim Avenue. Touching our roof and gutt...

26/00060/TCA

Nearby new applications

28 Sept 2026Pending

Scout Hut 51 - 57 Brookvale Road Southampton SO17 1QS

Non-material amendment sought to planning permission ref 25/00627/FUL for replac...

26/01117/NMA
15 Sept 2026Pending

51 - 57 Brookvale Road Scout Hut Southampton SO17 1QS

Application for approval of details reserved by conditions 4 (external Materials...

26/01077/DIS
10 Sept 2026Pending

49 Avenue Road Southampton SO14 6TW

Erection of a part single-storey, part two-storey side and rear extension

25/01345/FUL
8 Sept 2026Pending

46 Orchards Way Southampton SO17 1RE

Erection of a single storey rear extension.

26/01055/FUL
1 Sept 2026Pending

Highcliff House Highcliff Avenue Southampton SO14 0TN

Conversion of ground floor flat to 2x1 bed flats with external alterations

26/00873/FUL
1 Sept 2026Pending

31 Blenheim Avenue Southampton SO17 1DW

T5 - mature ash tree in garden of 31 Blenheim Avenue next to NW boundary. Remove...

26/00061/TCA

Important details

Council
Southampton
Application type
Full Application
Postcode
SO17 1DU
Received
10 Apr 2026
Validated
10 Apr 2026
Ward
Portswood
Case officer
Show
Target decision
5 Jun 2026
Decision
Approve with Conditions
Decision date
5 Jun 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Archisolve

How this decision compares

Decided in 56 days from validation, about the council's usual 56 days. Approved, as 96% of demolitions here are.

56%decided within 8 weeks
96%approved
29decided in the last year

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

Public comments

1comment received
1 neutral

23 neighbours consulted · Last counted 8 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
20107
Neighbours
27 Apr 2026
Consultation
27 Apr 2026
Comments by
18 May 2026
Statutory expiry
5 Jun 2026
Env. assessment
No

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

2025 Approved
Pollard a Eucalyptus tree (No 1 on sketch) in the rear garden close to the West boundary.
25/00025/TCA
2018 Approved
Tree Works
18/00039/TCA
Within ~100m

Nearby activity

2025 Approved
48 Blenheim Avenue Southampton SO17 1DU
T1 Norway Maple-Reduce and reshape by up to 3 metres. T2 Pyrus-Reduce height by 1 metre a…
25/00052/TCA
2025 Refused
11 Blenheim Avenue Southampton SO17 1DW
Replacement of front 1st and 2nd floor windows with uPVC windows
25/00441/FUL
2024 Approved
11 Blenheim Avenue Southampton SO17 1DW
T1 - bigger maple - reduce height of crown by approximately 1m to provide adequate cleara…
24/00059/TCA
2024 Approved
41 Blenheim Avenue Southampton SO17 1DW
T1 - spruce - cut down
24/00056/TCA
2024 Approved
16 Blenheim Avenue Southampton SO17 1DU
Cherry Plum - Reduce crown & reshape by 1-1.5m and crown thin 30%
24/00050/TCA
2024 Approved
19 Blenheim Avenue Southampton SO17 1DW
T1 Arbutus - crown reduction by approximately 2.5- 3 meters back to previous points.
24/00048/TCA
2024 Approved
19 Blenheim Avenue Southampton SO17 1DW
Replacement window casements in the four front bays of the house with hard wood, double g…
24/00273/FUL
2024 Approved
12 Blenheim Avenue Southampton SO17 1DU
T1 Silver Birch - Reduce and reshape crown by approximately 1m back to previous pruning p…
24/00017/TCA
2024 Approved
52 Blenheim Avenue Southampton SO17 1DU
T1 Magnolia - Re-pollard to original cut points. T2 Conifer - Reduce height by 2 meters a…
24/00002/TCA
2023 Approved
46 Blenheim Avenue Southampton SO17 1DU
T1 Flowering Thorn - Crown reduce by c.2m thus leaving tree with a height 4.5m and radius…
23/00058/TCA
2023 Approved
26 Blenheim Avenue Southampton SO17 1DU
To prune two cherry trees, labelled CT1 and CT2 on sketch plan, by no more than 2 metres…
23/00046/TCA
2023 Approved
46 Blenheim Avenue Southampton SO17 1DU
Installation of side and rear dormer windows and removal of one chimney to facilitate lof…
23/00304/FUL
2023 Approved
28 Blenheim Avenue Southampton SO17 1DU
Painting unpainted pebble dash wall surface on front elevation as part of maintenance wor…
23/00103/FUL
2023 Approved
46 Blenheim Avenue Southampton SO17 1DU
1x silver birch - Fell
23/00007/TCA
2022 Approved
27 Blenheim Avenue Southampton SO17 1DW
Replacement windows to front elevation and new driveway gates
22/01407/FUL
2022 Approved
6 Blenheim Avenue Southampton SO17 1DU
Erection of a single storey side/rear extension with associated fenestration changes, sid…
22/01052/FUL
2022 Approved
46 Blenheim Avenue Southampton SO17 1DU
Silver Birch Trees x3 - Crown reduction to each by 25% as shown in photo. Crown lifting t…
22/00054/TCA
2022 Approved
19 Blenheim Avenue Southampton SO17 1DW
T1 Ash (Ash dieback present) - Dismantle the tree in sections leaving the stem at the hei…
22/00053/TCA
2022 Approved
41 Blenheim Avenue Southampton SO17 1DW
Erection of a single storey rear extension
22/00876/FUL
2022 Approved
48 Blenheim Avenue Southampton SO17 1DU
T1 - Maple so. to reduce the crown canopy by 2-2.5m stem diameter cuts no greater than 35…
22/00050/TCA
2016 Approved
27 Blenheim Avenue Southampton SO17 1DW
Part demolition of retaining wall, widening of existing path and creation of additional s…
16/01603/FUL
2016 Approved
9 Leigh Road Southampton SO17 1EF
Tree Works
16/00027/TCA
2016 Approved
32 Blenheim Avenue Southampton SO17 1DU
Re-surfacing of driveway and path
16/00495/FUL
2016 Approved
9 Blenheim Avenue Southampton SO17 1DW
Installation of replacement windows to front elevation.
16/00277/FUL
2016 Approved
11 Blenheim Avenue Southampton SO17 1DW
Tree Works
16/00008/TCA
Southampton
Planning Authority Score
5/10
Average
#150 of 296 councils
Relevant to this application:
Householder decisions

Southampton ranks #158 out of 296 councils for householder decision speed. Householder applications are slightly more likely to be approved here (93%) than the national average (90%).

These figures are council-wide context, not a prediction for this application. View full council performance
Southampton decision statistics
Based on MHCLG data, the year to March 2026
90%
Overall approval rate
Above avg (87%) #117 of 296
93%
Householder approved
Above avg (90%) #137 of 296
63%
Decided in 8 weeks
Above avg (63%) #158 of 296
40%
Extended time limit
Below avg (41%) #154 of 296
70%
Minor dwellings approved
50 decided (1-9 homes)
100%
Major dwellings approved
8 decided (10+ homes)
86%
Change of use approved
109 decided
742
Total decisions
72 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