Postcode record · Barnet
N12 9JD.
N12 9JD has 22 known premises and 23 planning records — 15 approved of 23 decided (65.2%). 8 EPC records.
Postcode N12 9JD · boundary not held, centred on the postcodeApprovedRefusedOther23 exact23 on the map — every match
At a glance · this postcodeBarnet profile →
22
Premises
known addresses (UPRNs)
23
Applications
23 decided
65.2%
Approval rate
15 approved · 2 refused
8
EPC records
ratings C 1 · D 6 · F 1
23
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?
N12 9JD has 22 known premises and 23 planning records — 15 approved of 23 decided (65.2%). 8 EPC records.
Premises (18 of 22 shown)
Name
Details
UPRN 200080018
UPRN 200080020
UPRN 200080022
UPRN 200080024
UPRN 200080026
UPRN 200080028
UPRN 200080030
UPRN 200080032
UPRN 200080034
UPRN 200080036
UPRN 200080018
UPRN 200080020
UPRN 200080022
Show all 10 rows
UPRN 200080024
UPRN 200080026
UPRN 200080028
UPRN 200080030
UPRN 200080032
UPRN 200080034
UPRN 200080036
Planning
What happened?
23 planning applications across the postcode; 15 approved of 23 decided (65.2%). Latest 23 shown.
Reference
Proposal · address
Type
Outcome
Date · distance
New front porch. Erection of a rear outbuilding following the demolition of existing outbuilding
62 Mayfield Avenue London N12 9JD · premises record
Applicant Ms Joanna Gordon · Agent Humphreys & Sons - Architecture & Surveyors · Officer Thomas Wong
Householder Application
Approved
2025-06-13
Installation of access ramp with associated handrails to front. Raised patio to rear garden with associated handrails
60 Mayfield Avenue London N12 9JD · premises record
Householder Application
Approved
2023-10-23
Erection of a rear outbuilding. New rear entrance door, verandah, decking and bbq area with flue
32 Mayfield Avenue London N12 9JD · premises record
Householder Application
Approved
2023-08-08
Single storey rear extension with new patio area
32 Mayfield Avenue London N12 9JD · premises record
Householder Application
Approved
2022-05-12
Conversion of garage into a granny annexe including single storey side extension and replacement of door with a window. New window and door to main entrance. New doors to rear elevation to replace existing french doors and new rear window
54 Mayfield Avenue London N12 9JD · premises record
Householder Application
Approved
2021-04-21
Single storey rear extension with a proposed depth of 3.5m, eaves height of 3m and maximum height of 4m
66 Mayfield Avenue London N12 9JD · premises record
Prior Notification (Householder)
Not required
2017-12-04
Single storey rear extension with a proposed depth of 3.5m, eaves height of 3m and maximum height of 4m
66 Mayfield Avenue London N12 9JD · premises record
Prior Notification (Householder)
Refused
2017-11-15
Single Storey Rear Extension
50 Mayfield Avenue London N12 9JD · premises record
Applicant Mr & Mrs P Wilson · Agent Magan D. Solanki
Proposed Lawful Development Certificate
Approved
2016-08-01
Single storey rear extension with a proposed maximum depth of 4.3 metres from original rear wall, eaves height of 2.7 metres and maximum height of 3.6 metres
50 Mayfield Avenue London N12 9JD · premises record
Applicant Peter Wilson · Agent Mr Magan D. Solanki
Prior Notification (Householder)
Not required
2016-06-21
Single Storey Rear Extension
48 Mayfield Avenue London N12 9JD · premises record
Proposed Lawful Development Certificate
Approved
2016-05-27
New front porch. Erection of a rear outbuilding following the demolition of existing outbuilding
62 Mayfield Avenue London N12 9JD · premises record
Applicant Ms Joanna Gordon · Agent Humphreys & Sons - Architecture & Surveyors · Officer Thomas Wong
Approved
2025-06-13
More
Householder Application
Installation of access ramp with associated handrails to front. Raised patio to rear garden with associated handrails
60 Mayfield Avenue London N12 9JD · premises record
Approved
2023-10-23
More
Householder Application
Erection of a rear outbuilding. New rear entrance door, verandah, decking and bbq area with flue
32 Mayfield Avenue London N12 9JD · premises record
Approved
2023-08-08
More
Householder Application
Show all 10 rows
Single storey rear extension with new patio area
32 Mayfield Avenue London N12 9JD · premises record
Approved
2022-05-12
More
Householder Application
Conversion of garage into a granny annexe including single storey side extension and replacement of door with a window. New window and door to main entrance. New doors to rear elevation to replace existing french doors and new rear window
54 Mayfield Avenue London N12 9JD · premises record
Approved
2021-04-21
More
Householder Application
Single storey rear extension with a proposed depth of 3.5m, eaves height of 3m and maximum height of 4m
66 Mayfield Avenue London N12 9JD · premises record
Not required
2017-12-04
More
Prior Notification (Householder)
Single storey rear extension with a proposed depth of 3.5m, eaves height of 3m and maximum height of 4m
66 Mayfield Avenue London N12 9JD · premises record
Refused
2017-11-15
More
Prior Notification (Householder)
Single Storey Rear Extension
50 Mayfield Avenue London N12 9JD · premises record
Applicant Mr & Mrs P Wilson · Agent Magan D. Solanki
Approved
2016-08-01
More
Proposed Lawful Development Certificate
Single storey rear extension with a proposed maximum depth of 4.3 metres from original rear wall, eaves height of 2.7 metres and maximum height of 3.6 metres
50 Mayfield Avenue London N12 9JD · premises record
Applicant Peter Wilson · Agent Mr Magan D. Solanki
Not required
2016-06-21
More
Prior Notification (Householder)
Single Storey Rear Extension
48 Mayfield Avenue London N12 9JD · premises record
Approved
2016-05-27
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 23 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 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 2 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
Applicant on 1 application
Applicant on 1 application
Development
What could it become?
Planning precedent23 applications and 23 mapped decisions in this postcode — precedent for what has been permitted and refused here.
Energy8 EPC records; ratings C: 1, D: 6, 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
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.