75 Mandeville Road London N14 7NJ Data via plota.co.uk

26/2576/RCU - Retention/Continued Use Pending Consideration
Extensions & alterations

Proposal

Retention and alteration to the as built single storey rear extension with green roof, raised terrace, and external steps and privacy screening and 1no. flat rooflight (Retrospective Application) Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
9 Jul 2026
✓
Validated
16 Jul 2026
✓
Consultation
23 Jul 2026
Decision
Expected by 17 Sept 2026

This application is under consideration - no decision has been issued yet. Plota predicted a decision around 14 Sept 2026; it is now day 60. The consultation period closed on 13 Aug 2026.

Documents 16

Statements & assessments 1

PDF PLANNING STATEMENT Planning statement · 16 Jul 2026 View ↗

Plans & drawings 8

PDF AS BUILT GROUND/FIRST FLOOR Drawing · 16 Jul 2026 View ↗ PDF PRE EXISTING GROUND/FIRST FLOOR Drawing · 16 Jul 2026 View ↗ PDF PROPOSED GROUND/FIRST FLOOR Drawing · 16 Jul 2026 View ↗ PDF PRE EXISTING SIDE/REAR Drawing · 16 Jul 2026 View ↗ PDF AS BUILT SIDE/REAR Drawing · 16 Jul 2026 View ↗ PDF PROPOSED SIDE/REAR Drawing · 16 Jul 2026 View ↗ PDF PROPOSED SECTION AA/BB Drawing · 16 Jul 2026 View ↗ PDF THE LOCATION PLAN Site Location Plan · 8 Jul 2026 View ↗

Application forms 2

PDF APPLICATION FORM - WITHOUT PERSONAL DATA Application Form · 8 Jul 2026 View ↗ PDF COMMUNITY INFRASTRUCTURE LEVY - COMPLETED FORM CIL Document · 8 Jul 2026 View ↗

Other documents 5

IMG SITE NOTICE Photo · 27 Jul 2026 View ↗ IMG SITE NOTICE Photo · 27 Jul 2026 View ↗ IMG SITE NOTICE Photo · 27 Jul 2026 View ↗ IMG SITE NOTICE Photo · 27 Jul 2026 View ↗ IMG SITE NOTICE Photo · 27 Jul 2026 View ↗

All documents on the council site ↗

Site constraints 3

Article 4 direction
Article 4 Small Houses in Multiple Occupation (HMO) Area 1. Named permitted development rights are withdrawn here.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.
Air quality management area: Barnet 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 ↗
Also on the record
Inside the Barnet 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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Important details

Council
Barnet
Application type
Retention/Continued Use
Postcode
N14 7NJ
Received
9 Jul 2026
Validated
16 Jul 2026
Ward
Brunswick Park
Case officer
Show
Target decision
17 Sept 2026
Applicant
Show
Agent
Monica Theo

Decision outlook

Day 60, past the statutory target. 97% of extensions in Barnet are decided within thirteen weeks, which runs to 15 Oct 2026; extensions of time are common, and the council need not decide on the day. Last seen undecided on 12 Sept 2026.

Day 604 days past the 56-day target
87%decided within 8 weeks
74%approved
1,436decided in the last year

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

Public comments

2comments received
2 neutral

Last counted 12 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15056456
Comments by
13 Aug 2026
Site or press notice
23 Jul 2026
Statutory expiry
10 Sept 2026

Historical activity at this location

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

This property

Previous applications at this address

2025 Approved
Single storey rear extension with a depth of 6.00m, a maximum height of 3.30m and an eave…
25/2056/PNH
Within ~100m

Nearby activity

2025
14 Summit Close London N14 7NR
Roof extension involving hip to gable, rear dormer window with juliette balcony
25/4129/HSE
2025 Approved
17 Mandeville Road London N14 7NJ
Single storey rear infill extension
25/1988/HSE
2024
71 Lincoln Avenue London N14 7LL
Single storey side extension and rear infill extension. Conversion of garage into habitab…
24/1694/HSE
2024 Approved
18 Underne Avenue London N14 7NE
Reduction of single storey rear extension in depth and height and reduction of patio in d…
24/0411/HSE
2023 Approved
65 Lincoln Avenue London N14 7LL
Erection of a rear outbuilding
23/5268/192
2022 Approved
65 Lincoln Avenue London N14 7LL
Roof extension involving hip to gable, rear dormer with juliette balcony, 4no front facin…
22/3562/192
2022 Approved
25 Mandeville Road London N14 7NJ
Roof extension involving hip to gable, rear dormer, and 4no front facing rooflights follo…
22/3823/192
2022 Approved
37 Lincoln Avenue London N14 7LJ
Single storey rear extension
22/2323/HSE
2022 Approved
65 Lincoln Avenue London N14 7LL
Single storey rear extension with new patio area and associated access steps. 4no. front…
22/2578/HSE
2022 Refused
37 Lincoln Avenue London N14 7LJ
single storey rear extension measuring 4.97 metres in depth beyond the original rear wall…
22/1368/PNH
2021 Approved
11 Summit Close London N14 7NR
Erection of a two-storey dwelling to the rear of No.11 Summit Close. Associated refuse/re…
21/3569/FUL
2022 Approved
37 Lincoln Avenue London N14 7LJ
Roof extension involving hip to gable, rear dormer window and 3no front facing rooflights
22/1270/192
2021 Approved
69 Lincoln Avenue London N14 7LL
Single storey rear extension with a proposed depth of 6.00 metres from original wall, a m…
21/5657/PNH
2021 Approved
69 Lincoln Avenue London N14 7LL
Single storey side and rear extension. Conversion of the existing garage into habitable r…
21/2553/HSE
2021 Approved
16 And 18 Underne Avenue London N14 7NE
Single storey rear extension to both properties
21/2993/HSE
2021 Approved
15 Mandeville Road London N14 7NJ
Roof extension involving hip to gable, rear dormer window with juliette balcony and 3no f…
21/2818/192
2021 Approved
18 Underne Avenue London N14 7NE
Roof extension involving hip to gable, rear dormer window with juliette balcony and 3no f…
21/2346/192
2021 Refused
18 Underne Avenue London N14 7NE
Single storey rear extension measures 4 metres in depth from the original rear wall with…
21/1806/PNH
2021 Refused
18 Underne Avenue London N14 7NE
Roof extension involving hip to gable, rear dormer window with Juliet balcony and 3no fro…
21/1504/192
2021 Refused
69 Lincoln Avenue London N14 7LL
Single storey side/rear extension including conversion of the existing garage into habita…
21/1215/192
2016 Approved
20 Mandeville Road London N14 7NH
Proposed front driveway with parking space for 2no. cars and dropped kerb from the public…
16/4254/192
2016 Approved
37A Mandeville Road London N14 7NJ
Extension to roof including hip to gable end, 1no rear dormer and 3no rooflights to front…
16/2986/192
2016 Approved
37 Mandeville Road Southgate N14 7NJ
Extension to roof including rear dormer window with Juliette balcony and 3no roof lights…
16/2770/192
2016 Refused
69 Lincoln Avenue London N14 7LL
Two storey side extension
16/0551/HSE
2016 Approved
69 Lincoln Avenue London N14 7LL
Extensions to roof involving hip to gable end, rear dormer and 3 no rooflights to the fro…
16/0155/192
Barnet
Planning Authority Score
6.2/10
Average
#90 of 296 councils
Relevant to this application:
Householder decisions

Barnet is faster than most councils at deciding householder applications, ranking #42 out of 296. Only 25% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Barnet 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
Barnet decision statistics
Based on MHCLG data, the year to March 2026
75%
Overall approval rate
Below avg (87%) #285 of 296
82%
Householder approved
Below avg (90%) #264 of 296
79%
Decided in 8 weeks
Above avg (63%) #42 of 296
25%
Extended time limit
Below avg (41%) #29 of 296
55%
Minor dwellings approved
319 decided (1-9 homes)
90%
Major dwellings approved
21 decided (10+ homes)
41%
Change of use approved
132 decided
2,541
Total decisions
625 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings