Postcode record · Enfield
N21 3BS.
N21 3BS has 17 known premises and 43 planning records — 31 approved of 39 decided (79.5%). 7 EPC records.
Postcode N21 3BS · boundary not held, centred on the postcodeApprovedRefusedOther43 exact43 on the map — every match
At a glance · this postcodeEnfield profile →
17
Premises
known addresses (UPRNs)
43
Applications
39 decided
79.5%
Approval rate
31 approved · 8 refused
7
EPC records
ratings D 4 · E 3
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?
N21 3BS has 17 known premises and 43 planning records — 31 approved of 39 decided (79.5%). 7 EPC records.
Premises
Name
Details
UPRN 207036569
UPRN 207083491
UPRN 207083493
UPRN 207083494
UPRN 207090997
UPRN 207090998
UPRN 207090999
UPRN 207091216
UPRN 207091217
UPRN 207120422
UPRN 207036569
UPRN 207083491
UPRN 207083493
Show all 10 rows
UPRN 207083494
UPRN 207090997
UPRN 207090998
UPRN 207090999
UPRN 207091216
UPRN 207091217
UPRN 207120422
Planning
What happened?
43 planning applications across the postcode; 31 approved of 39 decided (79.5%). Latest 30 shown.
Reference
Proposal · address
Type
Outcome
Date · distance
Part single storey, part two storey rear extension with juliette balcony and installation of glass balustrade to existing balcony, conversion of garage to habitable space, raised rear patio, rear dormer, front and side roof lights, side solar PV panels, replacement of rear fenestration, new side windows, repositioning and replacement of front door, installation external wall insulation to all elevations and air-source heat pump to side.
20 Seaforth Gardens London N21 3BS · premises record
Householder
Approved
2026-02-13
Side dormer.
26 Seaforth Gardens London N21 3BS · premises record
Applicant Dr Danesh · Officer Mahboubeh Bahrami-Jovein
Householder
Approved
2026-02-12
Two storey side extension with bay window to align with porch, single storey rear extension, rear dormer with rooflights and roof extension.
26 Seaforth Gardens London N21 3BS · premises record
Householder
Approved
2024-09-25
Side dormer.
26 Seaforth Gardens London N21 3BS · premises record
Cert of Lawful Use/Operation - Proposed
Approved
2024-07-04
Detached outbuilding at rear.
24 Seaforth Gardens London N21 3BS · premises record
Householder
Approved
2024-04-09
Two storey side extension, single storey rear/side extension and loft conversion with rear dormer windows and rooflights.
26 Seaforth Gardens London N21 3BS · premises record
Householder
Approved
2024-03-14
Non material amendment to Ref: 23/01200/HOU to allow increase depth of single storey rear extension from 3.6m to 4.8m, rear extension to have pitch and flat roof,creating a wrap around pitch roof to front, side and rear, with alteration of rear dormer to a single larger dormer with pitched roof.
26 Seaforth Gardens London N21 3BS · premises record
App for Non-Material Amendments
Refused
2024-02-02
Non material amendment to Ref: 23/03761/HOU to allow changes to roof and rooflights.
16 Seaforth Gardens London N21 3BS · premises record
App for Non-Material Amendments
Approved
2023-08-15
Two storey side extension, single storey rear extension and loft conversion with two rear dormer windows and rooflights.
26 Seaforth Gardens London N21 3BS · premises record
Householder
Approved
2023-04-13
Front dormer together with conversion of garage into habitable room involving alterations to front elevation
14 Seaforth Gardens London N21 3BS · premises record
Householder
Refused
2022-11-15
Part single storey, part two storey rear extension with juliette balcony and installation of glass balustrade to existing balcony, conversion of garage to habitable space, raised rear patio, rear dormer, front and side roof lights, side solar PV panels, replacement of rear fenestration, new side windows, repositioning and replacement of front door, installation external wall insulation to all elevations and air-source heat pump to side.
20 Seaforth Gardens London N21 3BS · premises record
Approved
2026-02-13
More
Householder
Side dormer.
26 Seaforth Gardens London N21 3BS · premises record
Applicant Dr Danesh · Officer Mahboubeh Bahrami-Jovein
Approved
2026-02-12
More
Householder
Two storey side extension with bay window to align with porch, single storey rear extension, rear dormer with rooflights and roof extension.
26 Seaforth Gardens London N21 3BS · premises record
Approved
2024-09-25
More
Householder
Show all 10 rows
Side dormer.
26 Seaforth Gardens London N21 3BS · premises record
Approved
2024-07-04
More
Cert of Lawful Use/Operation - Proposed
Detached outbuilding at rear.
24 Seaforth Gardens London N21 3BS · premises record
Approved
2024-04-09
More
Householder
Two storey side extension, single storey rear/side extension and loft conversion with rear dormer windows and rooflights.
26 Seaforth Gardens London N21 3BS · premises record
Approved
2024-03-14
More
Householder
Non material amendment to Ref: 23/01200/HOU to allow increase depth of single storey rear extension from 3.6m to 4.8m, rear extension to have pitch and flat roof,creating a wrap around pitch roof to front, side and rear, with alteration of rear dormer to a single larger dormer with pitched roof.
26 Seaforth Gardens London N21 3BS · premises record
Refused
2024-02-02
More
App for Non-Material Amendments
Non material amendment to Ref: 23/03761/HOU to allow changes to roof and rooflights.
16 Seaforth Gardens London N21 3BS · premises record
Approved
2023-08-15
More
App for Non-Material Amendments
Two storey side extension, single storey rear extension and loft conversion with two rear dormer windows and rooflights.
26 Seaforth Gardens London N21 3BS · premises record
Approved
2023-04-13
More
Householder
Front dormer together with conversion of garage into habitable room involving alterations to front elevation
14 Seaforth Gardens London N21 3BS · premises record
Refused
2022-11-15
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?
Every mapped designation touching a premises in this postcode, with how many of its 17 premises each one covers.
Designation
Coverage
Article 4 Direction Area
Borough wide · reference AD17 · covers 17 of 17 premises. Some normally permitted changes may require planning permission.
Archaeological Priority Area
Archaeological priority area surrounding Grade II* post-medeival park and medieval settlement · reference 76517 · covers 1 of 17 premises. Groundworks may require archaeological assessment or investigation.
Article 4 Direction Area
Borough wide · reference AD17 · covers 17 of 17 premises. Some normally permitted changes may require planning permission.
Archaeological Priority Area
Archaeological priority area surrounding Grade II* post-medeival park and medieval settlement · reference 76517 · covers 1 of 17 premises. Groundworks may require archaeological assessment or investigation.
Nearby postcodes and streets
Walk to the next area — linked where the Atlas has a record for it (pilot borough only for now).
Denleigh Gardens0 mSeaforth Gardens0 mFootpath From Church Hill To Grovelands Park6 mFootpath Starting At Seaforth Gardens Ending At Footpath From Broad Walk To Grovelands Park7 mFootpath From Seaforth Gardens To Grovelands Park18 mBranscombe Gardens50 mBroad Walk53 mDownes Court55 mFootpath From Branscombe Gardens To Grovelands Park55 m
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 5 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 1 application
Applicant on 1 application
Applicant on 5 applications
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 precedent43 applications and 43 mapped decisions in this postcode — precedent for what has been permitted and refused here.
Energy7 EPC records; ratings D: 4, 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
The Developer PlanOwnership, 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.