41 Lyonsdown Avenue Barnet EN5 1DX Data via plota.co.uk

26/1423/HSE - Householder Application Refused
Extensions & alterations

Proposal

Single storey rear extension with new lowered patio area and associated access steps. New hard and soft landscaping. Conversion of the existing garage into habitable room, insertion of window to replace garage door Data via plota.co.uk

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View original council record ↗

Application progress

✓
Received
17 Apr 2026
✓
Validated
20 Apr 2026
✗
Refused
19 May 2026
✓
Consultation
20 May 2026
Appeal
Not lodged

Refused on 19 May 2026 · Delegated Decision · Last checked 7 Jul 2026

Documents 17

Decision & officer reports 2

PDF DELEGATED REPORT Report · 20 May 2026 View ↗ PDF DN: REFUSE HSE Decision Notice · 19 May 2026 View ↗

Statements & assessments 1

PDF PLANNING STATEMENT Planning statement · 17 Apr 2026 View ↗

Plans & drawings 9

PDF THE LOCATION PLAN Site Location Plan · 17 Apr 2026 View ↗ PDF EXISTING SITE PLAN Drawing · 17 Apr 2026 View ↗ PDF PROPOSED SITE PLAN Drawing · 17 Apr 2026 View ↗ PDF EXISTING GROUND/FIRST FLOOR Drawing · 17 Apr 2026 View ↗ PDF EXISTING ROOF/FRONT/REAR Drawing · 17 Apr 2026 View ↗ PDF EXISTING SIDE/SECTION Drawing · 17 Apr 2026 View ↗ PDF PROPOSED GROUND/FIRST FLOOR Drawing · 17 Apr 2026 View ↗ PDF PROPOSED ROOF/FRONT/REAR Drawing · 17 Apr 2026 View ↗ PDF PROPOSED SIDE/SECTION Drawing · 17 Apr 2026 View ↗

Application forms 2

PDF APPLICATION FORM - WITHOUT PERSONAL DATA Application Form · 17 Apr 2026 View ↗ PDF COMMUNITY INFRASTRUCTURE LEVY - COMPLETED FORM CIL Document · 17 Apr 2026 View ↗

Consultation & comments 1

PDF COMMENT(FULL) Public Comment · 7 May 2026 View ↗

Other documents 2

PDF SITE NOTICE Photo · 19 May 2026 View ↗ PDF SITE NOTICE PHOTO Photo · 6 May 2026 View ↗

All documents on the council site ↗

Other new applications on this street

59 Lyonsdown Avenue Barnet EN5 1DX

Single storey side extension to provide bike store. Addition of a canopy above s...

26/2575/HSE - 8 Jul 2026

Nearby new applications

41 Friern Mount Drive London N20 9DJ

Two storey side and rear extensions following the demolition of existing front p...

26/2769/HSE - 27 Jul 2026

Meadow Works Great North Road Barnet EN5 1AU

Submission of details of condition 32 (Piling Method Statement) pursuant to plan...

26/2748/CON - 24 Jul 2026

16 Buckingham Avenue London N20 9BX

1 x Ash (applicants ref. T1) - Remove dangerous branch. Standing in T19 of Tree ...

TPP/0421/26 - 17 Jul 2026

Meadow Works Great North Road Barnet EN5 1AU

Submission of details of condition 5 (Demolition and Construction Management and...

26/2648/CON - 15 Jul 2026

59 Lyonsdown Avenue Barnet EN5 1DX

Single storey side extension to provide bike store. Addition of a canopy above s...

26/2575/HSE - 8 Jul 2026

Meadow Works Great North Road Barnet EN5 1AU

Submission of details of condition 29 (Surface Water Drainage) pursuant to plann...

26/2547/CON - 7 Jul 2026

Important details

Council
Barnet
Application type
Householder Application
Postcode
EN5 1DX
Received
17 Apr 2026
Validated
20 Apr 2026
Ward
Barnet Vale
Case officer
Show
Target decision
15 Jun 2026
Decision
Refuse
Decision date
19 May 2026
Decision level
Delegated Decision
Applicant
Show
Agent
AE Building Design and Surveying

Consultation & key dates

Alt. reference
PP-14862921
Neighbours
20 May 2026
Site notice
23 Apr 2026

Historical activity at this location

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

This property

Previous applications at this address

2025
Single storey rear extension with new raised patio area and associated access steps
25/5008/HSE
2018 Approved
Single storey rear extension following demolition of existing conservatory
18/4581/HSE
2018 Withdrawn
Single storey rear extension
18/4104/192
Within ~100m

Nearby activity

2024 Approved
49 Lyonsdown Avenue Barnet EN5 1DX
Alterations to the existing garage including replacement of the garage door with a window…
24/3373/HSE
2024 Approved
42 Lyonsdown Avenue Barnet EN5 1DX
Conversion of the existing garage into habitable room, insertion of windows to replace th…
24/3457/192
2024 Approved
40A Lyonsdown Avenue Barnet EN5 1DX
Two storey front extension following removal of the existing porch. Render of existing wa…
24/2489/HSE
2024 Approved
11 Northumberland Road Barnet EN5 1EF
Single storey rear extension
24/1068/HSE
2023 Approved
40A Lyonsdown Avenue Barnet EN5 1DX
Single storey rear extension. Associated hard landscaping (Amended Description)
23/3882/HSE
2021 Approved
55 Lyonsdown Avenue Barnet EN5 1DX
Single storey rear extension with new rear patio area. Alteration to rear dormer window
21/4152/LBC
2022 Approved
57 Lyonsdown Avenue Barnet EN5 1DX
Single storey rear extension
22/3909/HSE
2022 Approved
43 Lyonsdown Avenue Barnet EN5 1DX
Single storey side/ rear extension over existing patio. First floor rear extension follow…
22/3242/HSE
2022 Approved
69 Monks Avenue Barnet EN5 1DA
Conversion of the existing garage into habitable room, insertion of window to replace the…
22/0586/192
2021 Approved
55 Lyonsdown Avenue Barnet EN5 1DX
Single storey rear extension with new rear patio area (amended description)
21/4165/HSE
2021 Approved
73 Monks Avenue Barnet EN5 1DA
First floor side extension
21/4731/HSE
2020 Approved
36 Lyonsdown Avenue Barnet EN5 1DX
Replacement of rear conservatory with glazed orangery, conversion of existing garage into…
20/3623/HSE
2020 Refused
36 Lyonsdown Avenue Barnet EN5 1DX
Conversion of garage into habitable including new window and door to replace existing gar…
20/2850/192
2019 Approved
67 Monks Avenue Barnet EN5 1DA
Roof extension involving side and rear dormer window and 3no front facing rooflights to m…
19/6192/HSE
2019 Approved
40A Lyonsdown Avenue Barnet EN5 1DX
Single storey front extension incorporating new front porch with new access steps. Replac…
19/5879/HSE
2019 Approved
40A Lyonsdown Avenue Barnet EN5 1DX
Single storey rear extension and hard landscaping to the rear of the site.
19/5878/192
2019 Refused
67 Monks Avenue Barnet EN5 1DA
Roof extension involving hip to gable, rear dormer window with Juliette balcony and 3 no…
19/4995/HSE
2019 Approved
69 Monks Avenue Barnet EN5 1DA
Single storey rear extension with a proposed depth of 5m metres from original rear wall…
19/3734/PNH
2019 Refused
69 Monks Avenue Barnet EN5 1DA
Single storey rear extension with a proposed depth of 5 metres from original rear wall, e…
19/2947/PNH
2018 Approved
33 Lyonsdown Avenue Barnet EN5 1DU
Part single, part two storey side and rear extension incorporating new garage following d…
18/7038/HSE
2017 Approved
73 Monks Avenue Barnet EN5 1DA
Roof extension involving hip to gable, rear dormer window with juliette balcony, 3no. roo…
17/1705/192
2017 Refused
73 Monks Avenue Barnet EN5 1DA
Roof extension involving hip to gable, rear dormer window with juliette balcony, 3no. roo…
17/0475/192
2016 Approved
75 Monks Avenue Barnet EN5 1DA
Part single, part two storey side and rear extensions including conversion of garage into…
16/7558/HSE
2016 Approved
35 Lyonsdown Avenue Barnet EN5 1DU
1 x Dead Pine - Remove. T19 of Tree Preservation Order
TPF/0529/16
2016 Approved
36 Lyonsdown Avenue Barnet EN5 1DX
Application to discharge condition (iv) of Appeal Decision Ref: APP/TPO/N5090/4846 dated…
TCO/0057/16
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 performance
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