Postcode record · Barnet
N3 3DH.
N3 3DH has 18 known premises and 37 planning records — 27 approved of 37 decided (73%). 6 EPC records.
Postcode N3 3DH · boundary not held, centred on the postcodeApprovedRefusedOther37 exact5 approximate42 on the map — every match
At a glance · this postcodeBarnet profile →
18
Premises
known addresses (UPRNs)
37
Applications
37 decided
73%
Approval rate
27 approved · 9 refused
6
EPC records
ratings B 2 · C 1 · D 2 · E 1
42
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?
N3 3DH has 18 known premises and 37 planning records — 27 approved of 37 decided (73%). 6 EPC records.
Premises
Name
Details
UPRN 200069913
UPRN 200069915
UPRN 200069917
UPRN 200069919
UPRN 200069921
UPRN 200069923
UPRN 200069925
UPRN 200069927
UPRN 200069929
UPRN 200069931
UPRN 200069913
UPRN 200069915
UPRN 200069917
Show all 10 rows
UPRN 200069919
UPRN 200069921
UPRN 200069923
UPRN 200069925
UPRN 200069927
UPRN 200069929
UPRN 200069931
Planning
What happened?
37 planning applications across the postcode; 27 approved of 37 decided (73%). Latest 30 shown.
Reference
Proposal · address
Type
Outcome
Date · distance
Single storey rear extension with a proposed depth of 5.00 metres, maximum height of 3.28 metres and eaves height of 2.91 metres.
33 Kingsgate Avenue London N3 3DH · premises record
Prior Notification (Householder)
Refused
2025-12-29
Roof extension involving rear dormer window and 3no. front facing rooflights. New front porch and front window. Erection of a rear outbuilding with terrace area
33 Kingsgate Avenue London N3 3DH · premises record
Proposed Lawful Development Certificate
Approved
2025-12-15
Works to existing building to include, new fenestration to rear ground floor, replacement rooflights to rear extension, replacement front door and portico, extension of existing dormer window to include Juliette balcony, garage door replaced with window, infilling of ground floor side window and doors and new side door access
7 Kingsgate Avenue London N3 3DH · premises record
Householder Application
Approved
2023-10-06
First floor rear extension. Conversion of garage into habitable room including insertion of window to replace existing door. Roof extension including rear dormer window following removal of existing rear dormer. Insertion of 1no. additional rooflight to side elevation
23 Kingsgate Avenue London N3 3DH · premises record
Householder Application
Approved
2023-01-20
Single storey rear extension following the demolition of the existing rear bay window conservatory
7 Kingsgate Avenue London N3 3DH · premises record
Householder Application
Approved
2023-01-18
First floor rear extension. Conversion of garage into habitable room including insertion of window to replace existing door
23 Kingsgate Avenue London N3 3DH · premises record
Householder Application
Approved
2023-01-17
Single storey rear extension with a proposed depth of 8.00 metres from original rear wall, maximum height of 4.00 metres and eaves height of 3.00 metres, following demolition of existing rear extension.
7 Kingsgate Avenue London N3 3DH · premises record
Prior Notification (Householder)
Refused
2022-10-18
Erection of a rear outbuilding
25 Kingsgate Avenue London N3 3DH · premises record
Proposed Lawful Development Certificate
Approved
2022-03-02
Roof extension including rear domer window, 1no side dormer to both sides and 3no front facing rooflights
3 Kingsgate Avenue London N3 3DH · premises record
Proposed Lawful Development Certificate
Approved
2022-02-04
Single storey rear extension with a proposed depth of 5.00 metres, maximum height of 3.28 metres and eaves height of 2.91 metres.
33 Kingsgate Avenue London N3 3DH · premises record
Refused
2025-12-29
More
Prior Notification (Householder)
Roof extension involving rear dormer window and 3no. front facing rooflights. New front porch and front window. Erection of a rear outbuilding with terrace area
33 Kingsgate Avenue London N3 3DH · premises record
Approved
2025-12-15
More
Proposed Lawful Development Certificate
Works to existing building to include, new fenestration to rear ground floor, replacement rooflights to rear extension, replacement front door and portico, extension of existing dormer window to include Juliette balcony, garage door replaced with window, infilling of ground floor side window and doors and new side door access
7 Kingsgate Avenue London N3 3DH · premises record
Approved
2023-10-06
More
Householder Application
Show all 10 rows
Erection of a rear outbuilding
7 Kingsgate Avenue London N3 3DH · premises record
Approved
2023-10-06
More
—
First floor rear extension. Conversion of garage into habitable room including insertion of window to replace existing door. Roof extension including rear dormer window following removal of existing rear dormer. Insertion of 1no. additional rooflight to side elevation
23 Kingsgate Avenue London N3 3DH · premises record
Approved
2023-01-20
More
Householder Application
Single storey rear extension following the demolition of the existing rear bay window conservatory
7 Kingsgate Avenue London N3 3DH · premises record
Approved
2023-01-18
More
Householder Application
First floor rear extension. Conversion of garage into habitable room including insertion of window to replace existing door
23 Kingsgate Avenue London N3 3DH · premises record
Approved
2023-01-17
More
Householder Application
Single storey rear extension with a proposed depth of 8.00 metres from original rear wall, maximum height of 4.00 metres and eaves height of 3.00 metres, following demolition of existing rear extension.
7 Kingsgate Avenue London N3 3DH · premises record
Refused
2022-10-18
More
Prior Notification (Householder)
Erection of a rear outbuilding
25 Kingsgate Avenue London N3 3DH · premises record
Approved
2022-03-02
More
Proposed Lawful Development Certificate
Roof extension including rear domer window, 1no side dormer to both sides and 3no front facing rooflights
3 Kingsgate Avenue London N3 3DH · premises record
Approved
2022-02-04
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 18 premises each one covers.
Designation
Coverage
Article 4 Direction Area
Article 4 Small Houses in Multiple Occupation (HMO) Area 1 · reference A4D14A1 · covers 18 of 18 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 18 of 18 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 2 applications
Applicant on 2 applications
Applicant on 2 applications
Applicant on 2 applications
Applicant on 2 applications
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Agent on 3 applications
Applicant on 2 applications
Applicant on 2 applications
Applicant on 2 applications
Show all 10 rows
Applicant on 2 applications
Applicant on 2 applications
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Agent on 3 applications
Development
What could it become?
Planning precedent37 applications and 42 mapped decisions in this postcode — precedent for what has been permitted and refused here.
Energy6 EPC records; ratings B: 2, C: 1, D: 2, E: 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
Planning Atlas ProOwnership, 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.