Postcode record · Enfield
N21 1DX.
N21 1DX has 18 known premises and 28 planning records — 14 approved of 26 decided (53.8%). 13 EPC records.
Postcode N21 1DX · boundary not held, centred on the postcodeApprovedRefusedOther25 on the map — every match
At a glance · this postcodeEnfield profile →
18
Premises
known addresses (UPRNs)
28
Applications
26 decided
53.8%
Approval rate
14 approved · 10 refused
13
EPC records
ratings D 11 · E 1 · G 1
25
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?
N21 1DX has 18 known premises and 28 planning records — 14 approved of 26 decided (53.8%). 13 EPC records.
Premises
Name
Details
UPRN 207036733
UPRN 207124235
UPRN 207124236
UPRN 207124237
UPRN 207124238
UPRN 207124239
UPRN 207124240
UPRN 207124241
UPRN 207124242
UPRN 207124243
UPRN 207036733
UPRN 207124235
UPRN 207124236
Show all 10 rows
UPRN 207124237
UPRN 207124238
UPRN 207124239
UPRN 207124240
UPRN 207124241
UPRN 207124242
UPRN 207124243
Planning
What happened?
28 planning applications across the postcode; 14 approved of 26 decided (53.8%). Latest 28 shown.
Reference
Proposal · address
Type
Outcome
Date · distance
Rear dormer involving hip to gable roof extension and front rooflights.
16 Onslow Gardens London N21 1DX · premises record
Householder
Refused
2025-10-21
Rear dormer involving rooflights to front.
16 Onslow Gardens London N21 1DX · premises record
Householder
Approved
2025-10-21
Two storey side extension, single storey front extension, part single part 2 storey rear extension and rear dormer with front roof lights and extension to roof.
22 Onslow Gardens London N21 1DX · premises record
Householder
Approved
2024-10-18
Single storey rear extension 6m deep x 3m high (3m high to eaves).
14 Onslow Gardens London N21 1DX · premises record
Applicant Omar Shafi · Officer Mark Chan
Class A HH - Prior Approval
Objection
2018-03-13
Cert of Lawful Use/Operation - Proposed
12 Onslow Gardens London N21 1DX · premises record
Cert of Lawful Use/Operation - Proposed
Approved
2018-01-08
Single storey 3.226m rear extension to existing 2.774m extension totalling 6.m deep x 3m high (3m high to eaves).
14 Onslow Gardens London N21 1DX · premises record
Class A HH - Prior Approval
No objection
2017-11-09
First floor side and rear extension and rear dormer with front rooflights.
14 Onslow Gardens London N21 1DX · premises record
Householder
Approved
2017-10-20
Two-storey side extension and part single, part 2-storey rear extension and rear dormer with front and side rooflights.
14 Onslow Gardens London N21 1DX · premises record
Householder
Refused
2017-02-01
First floor rear extension.
40, Onslow Gardens, London, N21 1DX · premises record
Householder
Refused
2014-01-30
First floor rear extension with domed roof light and balustrade.
12, Onslow Gardens, London, N21 1DX · premises record
Applicant Mr Terry Collins · Officer Sharon Davidson
Householder
Approved
2010-08-06
Rear dormer involving hip to gable roof extension and front rooflights.
16 Onslow Gardens London N21 1DX · premises record
Refused
2025-10-21
More
Householder
Rear dormer involving rooflights to front.
16 Onslow Gardens London N21 1DX · premises record
Approved
2025-10-21
More
Householder
Two storey side extension, single storey front extension, part single part 2 storey rear extension and rear dormer with front roof lights and extension to roof.
22 Onslow Gardens London N21 1DX · premises record
Approved
2024-10-18
More
Householder
Show all 10 rows
Single storey rear extension 6m deep x 3m high (3m high to eaves).
14 Onslow Gardens London N21 1DX · premises record
Applicant Omar Shafi · Officer Mark Chan
Objection
2018-03-13
More
Class A HH - Prior Approval
Cert of Lawful Use/Operation - Proposed
12 Onslow Gardens London N21 1DX · premises record
Approved
2018-01-08
More
Cert of Lawful Use/Operation - Proposed
Single storey 3.226m rear extension to existing 2.774m extension totalling 6.m deep x 3m high (3m high to eaves).
14 Onslow Gardens London N21 1DX · premises record
No objection
2017-11-09
More
Class A HH - Prior Approval
First floor side and rear extension and rear dormer with front rooflights.
14 Onslow Gardens London N21 1DX · premises record
Approved
2017-10-20
More
Householder
Two-storey side extension and part single, part 2-storey rear extension and rear dormer with front and side rooflights.
14 Onslow Gardens London N21 1DX · premises record
Refused
2017-02-01
More
Householder
First floor rear extension.
40, Onslow Gardens, London, N21 1DX · premises record
Refused
2014-01-30
More
Householder
First floor rear extension with domed roof light and balustrade.
12, Onslow Gardens, London, N21 1DX · premises record
Applicant Mr Terry Collins · Officer Sharon Davidson
Approved
2010-08-06
More
Householder
Building control
Building-control records are not yet collected for Enfield — the register is being gathered borough by borough (held so far: Lambeth, Brent, Ealing, Westminster, City and others).
Place
What affects it?
Designations are shown per premises today (open any premises above); the postcode-level designation summary is built with the borough entity run. Use the map's designations filter to see them over the postcode now.
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 28 applications in this postcode — the party who applied, not the owner or occupier.
Name
Details
Applicant on 3 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 3 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 precedent28 applications and 25 mapped decisions in this postcode — precedent for what has been permitted and refused here.
Energy13 EPC records; ratings D: 11, E: 1, G: 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 Pro
Ownership, finance and market signals recorded at addresses in this postcode — each with date and source. Signals are evidence of change, not a prediction.
Boundary: OS Postcode Unit areas (Ordnance Survey), 2026-08-14. Planning records: canonical stage2. EPC: EPC register. Premises: OS AddressBase / UPRN.