Postcode record · Barnet
N3 3AX.
N3 3AX has 28 known premises and 42 planning records — 30 approved of 42 decided (71.4%). 17 EPC records.
Postcode N3 3AX · boundary not held, centred on the postcodeApprovedRefusedOther42 exact1 approximate43 on the map — every match
At a glance · this postcodeBarnet profile →
28
Premises
known addresses (UPRNs)
42
Applications
42 decided
71.4%
Approval rate
30 approved · 5 refused
17
EPC records
ratings C 3 · D 10 · E 4
43
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 3AX has 28 known premises and 42 planning records — 30 approved of 42 decided (71.4%). 17 EPC records.
Premises (18 of 28 shown)
Name
Details
UPRN 200009166
UPRN 200009170
UPRN 200009172
UPRN 200009174
UPRN 200009176
UPRN 200009178
UPRN 200009180
UPRN 200009181
UPRN 200009182
UPRN 200009184
UPRN 200009166
UPRN 200009170
UPRN 200009172
Show all 10 rows
UPRN 200009174
UPRN 200009176
UPRN 200009178
UPRN 200009180
UPRN 200009181
UPRN 200009182
UPRN 200009184
Planning
What happened?
42 planning applications across the postcode; 30 approved of 42 decided (71.4%). Latest 30 shown.
Reference
Proposal · address
Type
Outcome
Date · distance
Conversion of the existing garage including raising of the garage roof, insertion of window to replace garage door and part side extension
36 Beechwood Avenue London N3 3AX · premises record
Householder
Approved
2025-02-17
Alterations to existing pair of semi-detached houses including: Partial demolition of No. 42 to create a 1500mm gap (between Nos. 40 and 42) to form 2no. detached houses. Works to No. 42 include construction of a full height flank wall to enclose No. 42; Single storey rear extension; First floor rear infill extension; Replacement of two storey front projecting bay; Extension of existing roof to form side gable end (hip to gable extension); Relocation of existing front door and alterations to fenestration. Works to No. 40 include: Render finish to newly revealed flank wall; Adjustments to front bay roof to form a pitched hipped roof over front bay.
40 And 42 Beechwood Avenue London N3 3AX · premises record
Full Application
Approved
2025-02-11
Partial demolition of existing semi-detached house and construction of new flank wall to enclose No. 42 creating a 1500mm gap between the houses to form a detached property Single storey rear extension. First floor rear extension. Replacement of two storey front projecting bay and relocation of existing front door. Roof extension including hip to gable end
42 Beechwood Avenue London N3 3AX · premises record
Householder Application
Withdrawn
2024-11-04
Demolition of party wall between No. 40 and 42 to separate the two dwellings. Single storey rear and first floor infill extension to No.42
40 And 42 Beechwood Avenue London N3 3AX · premises record
Full Application
Refused
2023-10-05
Conversion of the existing garage into habitable room, insertion of window to replace the garage door and brise solei
42A Beechwood Avenue London N3 3AX · premises record
Proposed Lawful Development Certificate
Approved
2023-09-21
Roof extension involving hip to gable, involving rear dormer window and 3no front facing rooflights. Single storey rear infill extension following demolition of the existing conservatory. New side access door, installation of raised patio.
4 Beechwood Avenue London N3 3AX · premises record
Householder
Approved
2022-02-28
Single storey rear extension following demolition of the existing family and utility room
4 Beechwood Avenue London N3 3AX · premises record
Householder Application
Approved
2022-02-11
Roof extension involving hip to gable, rear dormer window and 3no. front facing rooflights
4 Beechwood Avenue London N3 3AX · premises record
Proposed Lawful Development Certificate
Approved
2022-02-11
Single storey rear extension with a proposed depth of 6.00 metres from the existing original garage, eaves height of 3.00 metres and maximum height of 3.58 metres
40 Beechwood Avenue London N3 3AX · premises record
Prior Notification (Householder)
Refused
2021-11-22
Two storey side extension, single storey rear extension
40 Beechwood Avenue London N3 3AX · premises record
Householder Application
Withdrawn
2021-10-26
Conversion of the existing garage including raising of the garage roof, insertion of window to replace garage door and part side extension
36 Beechwood Avenue London N3 3AX · premises record
Approved
2025-02-17
More
Householder
Alterations to existing pair of semi-detached houses including: Partial demolition of No. 42 to create a 1500mm gap (between Nos. 40 and 42) to form 2no. detached houses. Works to No. 42 include construction of a full height flank wall to enclose No. 42; Single storey rear extension; First floor rear infill extension; Replacement of two storey front projecting bay; Extension of existing roof to form side gable end (hip to gable extension); Relocation of existing front door and alterations to fenestration. Works to No. 40 include: Render finish to newly revealed flank wall; Adjustments to front bay roof to form a pitched hipped roof over front bay.
40 And 42 Beechwood Avenue London N3 3AX · premises record
Approved
2025-02-11
More
Full Application
Partial demolition of existing semi-detached house and construction of new flank wall to enclose No. 42 creating a 1500mm gap between the houses to form a detached property Single storey rear extension. First floor rear extension. Replacement of two storey front projecting bay and relocation of existing front door. Roof extension including hip to gable end
42 Beechwood Avenue London N3 3AX · premises record
Withdrawn
2024-11-04
More
Householder Application
Show all 10 rows
Demolition of party wall between No. 40 and 42 to separate the two dwellings. Single storey rear and first floor infill extension to No.42
40 And 42 Beechwood Avenue London N3 3AX · premises record
Refused
2023-10-05
More
Full Application
Conversion of the existing garage into habitable room, insertion of window to replace the garage door and brise solei
42A Beechwood Avenue London N3 3AX · premises record
Approved
2023-09-21
More
Proposed Lawful Development Certificate
Roof extension involving hip to gable, involving rear dormer window and 3no front facing rooflights. Single storey rear infill extension following demolition of the existing conservatory. New side access door, installation of raised patio.
4 Beechwood Avenue London N3 3AX · premises record
Approved
2022-02-28
More
Householder
Single storey rear extension following demolition of the existing family and utility room
4 Beechwood Avenue London N3 3AX · premises record
Approved
2022-02-11
More
Householder Application
Roof extension involving hip to gable, rear dormer window and 3no. front facing rooflights
4 Beechwood Avenue London N3 3AX · premises record
Approved
2022-02-11
More
Proposed Lawful Development Certificate
Single storey rear extension with a proposed depth of 6.00 metres from the existing original garage, eaves height of 3.00 metres and maximum height of 3.58 metres
40 Beechwood Avenue London N3 3AX · premises record
Refused
2021-11-22
More
Prior Notification (Householder)
Two storey side extension, single storey rear extension
40 Beechwood Avenue London N3 3AX · premises record
Withdrawn
2021-10-26
More
Householder Application
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 28 premises each one covers.
Designation
Coverage
Article 4 Direction Area
Article 4 Small Houses in Multiple Occupation (HMO) Area 1 · reference A4D14A1 · covers 28 of 28 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 28 of 28 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 4 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
Applicant on 1 application
Agent on 5 applications
Agent on 2 applications
Applicant on 4 applications
Applicant on 2 applications
Applicant on 2 applications
Show all 10 rows
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Agent on 5 applications
Agent on 2 applications
Development
What could it become?
Planning precedent42 applications and 43 mapped decisions in this postcode — precedent for what has been permitted and refused here.
Energy17 EPC records; ratings C: 3, D: 10, E: 4.
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.