Postcode record · Barnet
N3 3NJ.
N3 3NJ has 21 known premises and 17 planning records — 15 approved of 17 decided (88.2%). 8 EPC records.
Postcode N3 3NJ · boundary not held, centred on the postcodeApprovedRefusedOther17 exact17 on the map — every match
At a glance · this postcodeBarnet profile →
21
Premises
known addresses (UPRNs)
17
Applications
17 decided
88.2%
Approval rate
15 approved · 2 refused
8
EPC records
ratings C 2 · D 3 · E 3
17
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 3NJ has 21 known premises and 17 planning records — 15 approved of 17 decided (88.2%). 8 EPC records.
Premises (18 of 21 shown)
Name
Details
UPRN 200065918
UPRN 200065926
UPRN 200065927
UPRN 200065930
UPRN 200065931
UPRN 200065933
UPRN 200065935
UPRN 200065937
UPRN 200065939
UPRN 200065941
UPRN 200065918
UPRN 200065926
UPRN 200065927
Show all 10 rows
UPRN 200065930
UPRN 200065931
UPRN 200065933
UPRN 200065935
UPRN 200065937
UPRN 200065939
UPRN 200065941
Planning
What happened?
17 planning applications across the postcode; 15 approved of 17 decided (88.2%). Latest 17 shown.
Reference
Proposal · address
Type
Outcome
Date · distance
Erection of a rear outbuilding
4B Holly Park Gardens London N3 3NJ · premises record
Full Application
Refused
2022-04-01
Single storey side and rear extension following partial demolition of existing garage. Replacement of existing garage door with window
24 Holly Park Gardens London N3 3NJ · premises record
Householder Application
Approved
2021-08-18
Roof extension involving hip to gable, rear dormer window, 4no front facing rooflights and new side gable window
12 Holly Park Gardens London N3 3NJ · premises record
Proposed Lawful Development Certificate
Approved
2020-07-14
Single storey rear extension. Single storey side extension. Roof extension involving partial hip to gable including 2no. gable windows at second floor level, rear dormer window and 1no. rooflight to front and rear roofslopes to facilitate a loft conversion. New porch
26 Holly Park Gardens London N3 3NJ · premises record
Full Application
Approved
2014-11-07
Rear dormer and 3 no. rooflights to front to facilitate hip to gable loft conversion
10 Holly Park Gardens Finchley London Barnet N3 3NJ · premises record
Proposed Lawful Development Certificate
Approved
2014-11-05
Proposed hip to gable loft conversion and construction of rear dormer, with 3 no. rooflights
24 Holly Park Gardens, London, N3 3NJ · premises record
Proposed Lawful Development Certificate
Approved
2014-02-19
Single storey front extension and part ground, part first floor rear extension.
Edevra House, 14 Holly Park Gardens, London, N3 3NJ · premises record
Householder Application
Approved
2012-05-10
Retention of single storey rear extension.
12 Holly Park Gardens, London, N3 3NJ · premises record
Existing Lawful Development Certificate
Approved
2010-09-14
Single storey rear extension (Variation of planning permission F/00727/09).
18 Holly Park Gardens, London, N3 3NJ · premises record
Householder Application
Approved
2009-05-27
Single storey rear extension.
18 Holly Park Gardens, London, N3 3NJ · premises record
Full Application
Approved
2008-04-09
Erection of a rear outbuilding
4B Holly Park Gardens London N3 3NJ · premises record
Refused
2022-04-01
More
Full Application
Single storey side and rear extension following partial demolition of existing garage. Replacement of existing garage door with window
24 Holly Park Gardens London N3 3NJ · premises record
Approved
2021-08-18
More
Householder Application
Roof extension involving hip to gable, rear dormer window, 4no front facing rooflights and new side gable window
12 Holly Park Gardens London N3 3NJ · premises record
Approved
2020-07-14
More
Proposed Lawful Development Certificate
Show all 10 rows
Single storey rear extension. Single storey side extension. Roof extension involving partial hip to gable including 2no. gable windows at second floor level, rear dormer window and 1no. rooflight to front and rear roofslopes to facilitate a loft conversion. New porch
26 Holly Park Gardens London N3 3NJ · premises record
Approved
2014-11-07
More
Full Application
Rear dormer and 3 no. rooflights to front to facilitate hip to gable loft conversion
10 Holly Park Gardens Finchley London Barnet N3 3NJ · premises record
Approved
2014-11-05
More
Proposed Lawful Development Certificate
Proposed hip to gable loft conversion and construction of rear dormer, with 3 no. rooflights
24 Holly Park Gardens, London, N3 3NJ · premises record
Approved
2014-02-19
More
Proposed Lawful Development Certificate
Single storey front extension and part ground, part first floor rear extension.
Edevra House, 14 Holly Park Gardens, London, N3 3NJ · premises record
Approved
2012-05-10
More
Householder Application
Retention of single storey rear extension.
12 Holly Park Gardens, London, N3 3NJ · premises record
Approved
2010-09-14
More
Existing Lawful Development Certificate
Single storey rear extension (Variation of planning permission F/00727/09).
18 Holly Park Gardens, London, N3 3NJ · premises record
Approved
2009-05-27
More
Householder Application
Single storey rear extension.
18 Holly Park Gardens, London, N3 3NJ · premises record
Approved
2008-04-09
More
Full 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 21 premises each one covers.
Designation
Coverage
Article 4 Direction Area
Article 4 Small Houses in Multiple Occupation (HMO) Area 1 · reference A4D14A1 · covers 21 of 21 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 21 of 21 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 17 applications in this postcode — the party who applied, not the owner or occupier.
Name
Details
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 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
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 precedent17 applications and 17 mapped decisions in this postcode — precedent for what has been permitted and refused here.
Energy8 EPC records; ratings C: 2, D: 3, E: 3.
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.
4 intent signals recorded in this postcode
Beatable refusal · Long hold · HMO licensed
Subscribe to see the signals →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.