Postcode record · Barnet
NW7 3SL.
NW7 3SL has 22 known premises and 41 planning records — 31 approved of 41 decided (75.6%). 10 EPC records.
Postcode NW7 3SL · boundary not held, centred on the postcodeApprovedRefusedOther41 exact41 on the map — every match
At a glance · this postcodeBarnet profile →
22
Premises
known addresses (UPRNs)
41
Applications
41 decided
75.6%
Approval rate
31 approved · 7 refused
10
EPC records
ratings C 1 · D 5 · E 3 · F 1
41
Mapped applications
inside the postcode shape
Postcode unit boundary from Ordnance Survey; premises and applications inside it. Aggregates describe the area, not any single premises.
Property
What is it?
NW7 3SL has 22 known premises and 41 planning records — 31 approved of 41 decided (75.6%). 10 EPC records.
Premises (18 of 22 shown)
Name
Details
UPRN 200110467
UPRN 200110469
UPRN 200110471
UPRN 200110473
UPRN 200110475
UPRN 200110477
UPRN 200110479
UPRN 200110481
UPRN 200110483
UPRN 200110485
UPRN 200110467
UPRN 200110469
UPRN 200110471
Show all 10 rows
UPRN 200110473
UPRN 200110475
UPRN 200110477
UPRN 200110479
UPRN 200110481
UPRN 200110483
UPRN 200110485
Planning
What happened?
41 planning applications across the postcode; 31 approved of 41 decided (75.6%). Latest 30 shown.
Reference
Proposal · address
Type
Outcome
Date · distance
Roof extension involving hip to gable to rear with rear juliette balcony, and 1no. side dormer window on either side. Removal of the existing chimney stack [Amended Description]
37 Sunbury Avenue London NW7 3SL · premises record
Proposed Lawful Development Certificate
Approved
2026-04-17
Single storey rear extension
25 Sunbury Avenue London NW7 3SL · premises record
Householder Application
Approved
2023-12-15
Single storey rear extension with a depth of 6.00m, maximum height of 3.18m and eaves height of 3.00m
25 Sunbury Avenue London NW7 3SL · premises record
Prior Notification (Householder)
Refused
2023-10-10
Single storey rear extension with a depth of 6.00m, maximum height of 3.30m and eaves height of 3.10m
25 Sunbury Avenue London NW7 3SL · premises record
Prior Notification (Householder)
Refused
2023-08-29
First floor rear extension. New crown roof over existing side extension. New front porch
23 Sunbury Avenue London NW7 3SL · premises record
Householder Application
Approved
2021-05-24
Roof extension involving hip to gable rear dormer and 2no front facing rooflights, new side gable window and raising chimney height
17 Sunbury Avenue London NW7 3SL · premises record
Applicant Mr & Mrs Crann · Agent Studio 136 Architects Ltd
Proposed Lawful Development Certificate
Approved
2019-07-04
First floor rear extension following removal of existing ground floor rear extension pitched roof. Associated alterations to fenestration
23 Sunbury Avenue London NW7 3SL · premises record
Householder Application
Approved
2018-10-26
Extension to roof involving hip to gable and a side and rear wraparound dormer with french doors and juilet balcony
43 Sunbury Avenue London NW7 3SL · premises record
Applicant Mr & Mrs J Stillitz · Agent Mr Simon Webb
Proposed Lawful Development Certificate
Approved
2017-12-29
Part single storey, part two storey rear extension
31 Sunbury Avenue London NW7 3SL · premises record
Applicant Mr & Mrs Ellis · Agent Silverston Engineering Company
Householder Application
Approved
2017-10-17
Roof extension involving hip to gable, rear dormer window with juliette balcony, 1no. rooflights to front elevation to facilitate a loft conversion.
23 Sunbury Avenue London NW7 3SL · premises record
Proposed Lawful Development Certificate
Approved
2017-07-05
Roof extension involving hip to gable to rear with rear juliette balcony, and 1no. side dormer window on either side. Removal of the existing chimney stack [Amended Description]
37 Sunbury Avenue London NW7 3SL · premises record
Approved
2026-04-17
More
Proposed Lawful Development Certificate
Single storey rear extension
25 Sunbury Avenue London NW7 3SL · premises record
Approved
2023-12-15
More
Householder Application
Single storey rear extension with a depth of 6.00m, maximum height of 3.18m and eaves height of 3.00m
25 Sunbury Avenue London NW7 3SL · premises record
Refused
2023-10-10
More
Prior Notification (Householder)
Show all 10 rows
Single storey rear extension with a depth of 6.00m, maximum height of 3.30m and eaves height of 3.10m
25 Sunbury Avenue London NW7 3SL · premises record
Refused
2023-08-29
More
Prior Notification (Householder)
First floor rear extension. New crown roof over existing side extension. New front porch
23 Sunbury Avenue London NW7 3SL · premises record
Approved
2021-05-24
More
Householder Application
Roof extension involving hip to gable rear dormer and 2no front facing rooflights, new side gable window and raising chimney height
17 Sunbury Avenue London NW7 3SL · premises record
Applicant Mr & Mrs Crann · Agent Studio 136 Architects Ltd
Approved
2019-07-04
More
Proposed Lawful Development Certificate
First floor rear extension following removal of existing ground floor rear extension pitched roof. Associated alterations to fenestration
23 Sunbury Avenue London NW7 3SL · premises record
Approved
2018-10-26
More
Householder Application
Extension to roof involving hip to gable and a side and rear wraparound dormer with french doors and juilet balcony
43 Sunbury Avenue London NW7 3SL · premises record
Applicant Mr & Mrs J Stillitz · Agent Mr Simon Webb
Approved
2017-12-29
More
Proposed Lawful Development Certificate
Part single storey, part two storey rear extension
31 Sunbury Avenue London NW7 3SL · premises record
Applicant Mr & Mrs Ellis · Agent Silverston Engineering Company
Approved
2017-10-17
More
Householder Application
Roof extension involving hip to gable, rear dormer window with juliette balcony, 1no. rooflights to front elevation to facilitate a loft conversion.
23 Sunbury Avenue London NW7 3SL · premises record
Approved
2017-07-05
More
Proposed Lawful Development Certificate
Building control
Building-control records are not yet collected for Barnet — the register is being gathered borough by borough (held so far: Lambeth, Brent, Ealing, Westminster, City and others).
Place
What affects it?
Every mapped designation touching a premises in this postcode, with how many of its 22 premises each one covers.
Designation
Coverage
Article 4 Direction Area
Article 4 Small Houses in Multiple Occupation (HMO) Area 1 · reference A4D14A1 · covers 22 of 22 premises. Some normally permitted changes may require planning permission.
Article 4 Direction Area
Article 4 Small Houses in Multiple Occupation (HMO) Area 1 · reference A4D14A1 · covers 22 of 22 premises. Some normally permitted changes may require planning permission.
Nearby postcodes and streets
Walk to the next area — linked where the Atlas has a record for it (pilot borough only for now).
People
Who is involved?
Named on the latest 30 applications in this postcode — the party who applied, not the owner or occupier.
Name
Details
Applicant on 3 applications
Applicant on 3 applications
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 3 applications
Applicant on 3 applications
Applicant on 1 application
Show all 10 rows
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Development
What could it become?
Planning precedent41 applications and 41 mapped decisions in this postcode — precedent for what has been permitted and refused here.
Energy10 EPC records; ratings C: 1, D: 5, E: 3, F: 1.
What is not assertedNo capacity, value or ownership claim is made at area level; those belong to individual premises records and their evidence.
Intent signals
The Developer PlanOwnership, finance and market signals recorded at addresses in this postcode — each with date and source. Signals are evidence of change, not a prediction.
Thinking about a project here?
Boundary: OS Postcode Unit areas (Ordnance Survey), 2026-08-14. Planning records: canonical stage2. EPC: EPC register. Premises: OS AddressBase / UPRN.