Postcode record · Barnet
N11 3BY.
N11 3BY has 36 known premises and 20 planning records — 13 approved of 20 decided (65%). 16 EPC records.
Postcode N11 3BY · boundary not held, centred on the postcodeApprovedRefusedOther20 exact20 on the map — every match
At a glance · this postcodeBarnet profile →
36
Premises
known addresses (UPRNs)
20
Applications
20 decided
65%
Approval rate
13 approved · 6 refused
16
EPC records
ratings C 1 · D 12 · E 3
20
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?
N11 3BY has 36 known premises and 20 planning records — 13 approved of 20 decided (65%). 16 EPC records.
Premises (18 of 36 shown)
Name
Details
UPRN 200066058
UPRN 200066059
UPRN 200066060
UPRN 200066061
UPRN 200066062
UPRN 200066063
UPRN 200066064
UPRN 200066065
UPRN 200066066
UPRN 200066067
UPRN 200066058
UPRN 200066059
UPRN 200066060
Show all 10 rows
UPRN 200066061
UPRN 200066062
UPRN 200066063
UPRN 200066064
UPRN 200066065
UPRN 200066066
UPRN 200066067
Planning
What happened?
20 planning applications across the postcode; 13 approved of 20 decided (65%). Latest 20 shown.
Reference
Proposal · address
Type
Outcome
Date · distance
Erection of a rear outbuilding following demolition of the existing shed
19 Hollyfield Avenue London N11 3BY · premises record
Proposed Lawful Development Certificate
Approved
2025-07-18
Single storey rear extension with a proposed depth of 8.00 metres, maximum height of 3.00 metres and eaves height of 3.00 metres. (ADDITIONAL PLANS)
19 Hollyfield Avenue London N11 3BY · premises record
Prior Notification (Householder)
Approved
2025-06-17
Roof extension involving rear dormer and outrigger dormer and 3no. front facing rooflights
29 Hollyfield Avenue London N11 3BY · premises record
Proposed Lawful Development Certificate
Approved
2023-02-10
Roof extension including rear dormer window and 2no. rooflights to front roofslope
25 Hollyfield Avenue London N11 3BY · premises record
Proposed Lawful Development Certificate
Refused
2021-04-12
Roof extension including rear dormer window and 2no. rooflights to front roofslope
25 Hollyfield Avenue London N11 3BY · premises record
Proposed Lawful Development Certificate
Withdrawn
2021-03-09
Roof extension including rear dormer windows to main roofslope and rear outrigger and 2no. rooflights to front roofslope (RETROSPECTIVE APPLICATION)
27 Hollyfield Avenue London N11 3BY · premises record
Retention/Continued Use
Refused
2020-09-29
Childrens Home not more than 3 Children
33 Hollyfield Avenue London N11 3BY · premises record
Applicant Ms Oranu · Officer Helen McGuinness
Proposed Lawful Development Certificate
Approved
2020-06-26
Roof extension involving rear dormer window and 2no front facing rooflights (Retrospective Application)
25 Hollyfield Avenue London N11 3BY · premises record
Retention/Continued Use
Refused
2020-06-17
Single storey side/rear infill extension following demolition of the bay window
29 Hollyfield Avenue London N11 3BY · premises record
Householder Application
Approved
2020-02-18
Single storey infill side/rear extension following demolition of the bay window to the side wall of the outrigger (Retrospective/Amended)
27 Hollyfield Avenue London N11 3BY · premises record
Applicant Mr perarim gjokli · Agent Alter & Company
Householder Application
Approved
2019-03-01
Erection of a rear outbuilding following demolition of the existing shed
19 Hollyfield Avenue London N11 3BY · premises record
Approved
2025-07-18
More
Proposed Lawful Development Certificate
Single storey rear extension with a proposed depth of 8.00 metres, maximum height of 3.00 metres and eaves height of 3.00 metres. (ADDITIONAL PLANS)
19 Hollyfield Avenue London N11 3BY · premises record
Approved
2025-06-17
More
Prior Notification (Householder)
Roof extension involving rear dormer and outrigger dormer and 3no. front facing rooflights
29 Hollyfield Avenue London N11 3BY · premises record
Approved
2023-02-10
More
Proposed Lawful Development Certificate
Show all 10 rows
Roof extension including rear dormer window and 2no. rooflights to front roofslope
25 Hollyfield Avenue London N11 3BY · premises record
Refused
2021-04-12
More
Proposed Lawful Development Certificate
Roof extension including rear dormer window and 2no. rooflights to front roofslope
25 Hollyfield Avenue London N11 3BY · premises record
Withdrawn
2021-03-09
More
Proposed Lawful Development Certificate
Roof extension including rear dormer windows to main roofslope and rear outrigger and 2no. rooflights to front roofslope (RETROSPECTIVE APPLICATION)
27 Hollyfield Avenue London N11 3BY · premises record
Refused
2020-09-29
More
Retention/Continued Use
Childrens Home not more than 3 Children
33 Hollyfield Avenue London N11 3BY · premises record
Applicant Ms Oranu · Officer Helen McGuinness
Approved
2020-06-26
More
Proposed Lawful Development Certificate
Roof extension involving rear dormer window and 2no front facing rooflights (Retrospective Application)
25 Hollyfield Avenue London N11 3BY · premises record
Refused
2020-06-17
More
Retention/Continued Use
Single storey side/rear infill extension following demolition of the bay window
29 Hollyfield Avenue London N11 3BY · premises record
Approved
2020-02-18
More
Householder Application
Single storey infill side/rear extension following demolition of the bay window to the side wall of the outrigger (Retrospective/Amended)
27 Hollyfield Avenue London N11 3BY · premises record
Applicant Mr perarim gjokli · Agent Alter & Company
Approved
2019-03-01
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 36 premises each one covers.
Designation
Coverage
Article 4 Direction Area
Article 4 Small Houses in Multiple Occupation (HMO) Area 1 · reference A4D14A1 · covers 36 of 36 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 36 of 36 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 20 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 precedent20 applications and 20 mapped decisions in this postcode — precedent for what has been permitted and refused here.
Energy16 EPC records; ratings C: 1, D: 12, 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.
5 intent signals recorded in this postcode
Struggling director · 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.