81B Belsize Park Gardens London NW3 4NJ Data via plota.co.uk

2026/4360/P - Certificate of Lawfulness (Existing) REGISTERED
Solar & renewables

Proposal

Installation of an air-source heat pump (including the external unit and associated equipment) in ground-floor terrace. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
6 Oct 2026
✓
Validated
7 Oct 2026
Decision
Expected by 2 Dec 2026

Under consideration

No decision has been issued yet. Plota predicts a decision between 11 Nov 2026 and 25 Nov 2026, from Camden's recent lawful development certificates.

The consultation period closed on 6 Oct 2026.

Documents

View the documents on the council's website ↗

Site constraints 7

Belsize conservation area
Demolition needs planning permission and permitted development is restricted.
The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.
Council document ↗
3 Article 4 directions
Belsize Conservation Area Non-immediate Article 4 · Commercial, Business, and Service (Use Class E) to residential (Use Class C3) (outside CAZ) · Basements. Named permitted development rights are withdrawn here.
An Article 4 direction withdraws particular permitted development rights, so work that would normally need no application needs one here. Not every council has published its directions.
Air quality management area: Camden AQMA
The council has declared the area as failing an air quality objective.
Schemes that add traffic, parking or combustion plant are assessed against the area's action plan and may need an air quality assessment.
Council record ↗
Also on the record
Local nature reserve about 400 m away: Adelaide; 3 listed buildings within 150 m of the postcode pin; Inside the Camden built-up area; Public transport access: PTAL 4 (good), TfL 2023, for the 100 m square.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 13 October 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. Historic England, the Environment Agency, Natural England, Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

Building

Floor area105 m² (1,130 sq ft)
Energy ratingC (75 out of 100)
PropertyMid-terrace flat
Built2025
HeatingAir source heat pump, underfloor, electric
WallsAverage thermal transmittance 0.26 W/m²K

From the energy performance certificate lodged in September 2026, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate

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Other new applications on this street

7 Sept 2026Approved

87 Belsize Park Gardens London NW3 4NJ

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2026/4062/T
4 Sept 2026Approved

7 Belsize Park Gardens London NW3 4LB

Non-material amendment to planning permission ref. 2025/5424/P dated 06/05/2026 ...

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25 Aug 2026Approved

74 Belsize Park Gardens London NW3 4NG

FRONT GARDEN: 1 x Sycamore (T1) - Fell to ground level.

2026/3651/T

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Important details

Council
Camden
Application type
Certificate of Lawfulness (Existing)
Postcode
NW3 4NJ
Received
6 Oct 2026
Validated
7 Oct 2026
Ward
Belsize
Case officer
Show
Applicant
Show
Agent
Show
Freehold owner
Show

Decision outlook

Day 21 of the 56-day target. Camden usually decides lawful development certificates by day 43.

Day 2135 days to the 56-day target
77%decided within 8 weeks
94%approved
167decided in the last year

Plota live figures for lawful development certificates decided by Camden in the last twelve months, from validation. Camden decision record →

Consultation & key dates

Comments by
6 Oct 2026

Historical activity at this location

25 nearby applications on record - archival context, not part of the live application.

Within ~100m

Nearby activity

2024 Withdrawn
Flat A 75 Belsize Park Gardens London NW3 4JP
Demolition of shed exisiting and decking. Replacement outbuilding, pergola and decking at…
2024/3236/P
2024 Approved
89 Belsize Park Gardens London NW3 4NJ
FRONT GARDEN: 1 x Purple Plum (T1) - Crown reduce all new growth 30cm - 40cm above previo…
2024/5457/T
2023 Approved
81 Belsize Park Gardens London NW3 4NJ
Change of use from gym (Use Class E) to education use (Use Class F1) together with extern…
2023/3407/P
2024 Approved
83 Belsize Park Gardens London NW3 4NJ
Installation of a vehicle gate and new brick pier to match existing and relocation of bik…
2024/0320/P
2024 Approved
Flat 7 73 Belsize Park Gardens London Camden NW3 4JP
Replacement of windows to the side and rear elevations and replacement of existing waste…
2023/4821/P
2024 Approved
39 Primrose Gardens London NW3 4UL
REAR GARDEN: 1 x Lime (T1) - Reduce over-extended lateral growth by up to 2.5m to maintai…
2024/2567/T
2024 Approved
31 Primrose Gardens London Camden NW3 4UL
Conversion of two flats into a single family dwelling, extension to entrance at basement…
2024/0898/P
2023 Approved
81b Belsize Park Gardens & 24 Lambolle Place London NW3
Change of Use of ground floor from college (Class F1) to 2 flats (1x 1-bed flat & 1x 2-be…
2023/5139/P
2024 Approved
Garden Flats 62 & 64 Belsize Park Gardens London NW3 4NE
Amalgamation the existing two lower ground floor flats at nos. 62 & 64 into one self-cont…
2024/0994/P
2024 Approved
74 Belsize Park Gardens London NW3 4NG
FRONT GARDEN: 1 x Sycamore (T1) - Crown reduction by 1.5m back to previous pruning points.
2024/1086/T
2023 Approved
50 Basement Flat Belsize Park Gardens London Camden NW3 4ND
Installation of a timber framed and timber clad garden room
2023/2440/P
2023 Approved
56 Flat 1st Floor Belsize Park Gardens London NW3 4ND
Creation of front balcony over entrance portico with installation of iron railings and in…
2023/2966/P
2023 Approved
Flat Lower Ground Floor 25 Primrose Gardens London NW3 4UJ
Amalgamation of two units to a three-bed maisonette unit over the lower ground and part o…
2023/4459/P
2023 Approved
35 Primrose Gardens London NW3 4UL
REAR GARDEN: 1 x Bay (T1) - Fell to ground level.
2023/5224/T
2023 Approved
Basement Flat 50 Belsize Park Gardens London NW3 4ND
FRONT GARDEN: 1 x Holly (lex aquifolium) (T1) - Fell to ground level.
2023/4617/T
2023 Approved
Flat A 13 Primrose Gardens London NW3 4UJ
Erection of single storey rear extension.
2023/3843/P
2022 Approved
41 Primrose Gardens London NW3 4UL
Erection of glazed extension at lower ground floor level on the rear elevation, replaceme…
2022/4852/P
2023 Approved
Land at the rear of 50 Belsize Park Gardens London NW3 4ND
AREA TO REAR OF BACK GARDEN: 2 x Leyland Cypress (T7 &T8) - Fell to ground level and grin…
2023/4151/T
2023 Approved
83 Belsize Park Gardens London NW3 4NJ
REAR GARDEN: 1 x Bay (T1) - Fell and cut stump to ground level. FRONT GARDEN: 2 x Hawthor…
2023/3711/T
2023 Approved
58 Belsize Park Gardens London NW3 4ND
REAR GARDEN: 1 x Ash (T1) - Fell to ground level.
2023/3665/T
2016 Approved
39 Primrose Gardens London NW3 4UL
Conversion from 5 self-contained flats to 4 residential units (1x 3 bed maisonette and 3x…
2016/3192/P
2016 Approved
Flat A 21 Primrose Gardens London NW3 4UJ
Erection of single storey rear extension to lower ground floor flat
2016/3395/P
2016 Approved
39 Primrose Gardens London NW3 4UL
Conversion from 5x self-contained flats to 3 flats: (2x3 bed and 1x2bed) erection of sing…
2016/2397/P
2016 Approved
70 Belsize Park Gardens London NW3 4NE
REAR GARDEN: 1x Apple: Fell & remove
2016/3084/T
2016 Withdrawn
Flat B 77 Belsize Park Gardens London NW3 4JP
Erection of a summer/garden house in the rear garden in connection with residential flat…
2016/2411/INVALID
Camden
Planning Authority Score
3.1/10
Poor
#231 of 296 councils
Relevant to this application:
Householder decisions

Camden is slower than most councils at deciding householder applications, ranking #242 out of 296. Householder applications are slightly less likely to be approved here (88%) than the national average (90%).

Slower than most councils
for householder decisions
These figures are council-wide context, not a prediction for this application. View full council performance
Camden decision statistics
Based on MHCLG data, the year to March 2026
88%
Overall approval rate
Above avg (87%) #149 of 296
88%
Householder approved
Below avg (90%) #215 of 296
49%
Decided in 8 weeks
Below avg (63%) #242 of 296
41%
Extended time limit
Below avg (41%) #158 of 296
90%
Minor dwellings approved
467 decided (1-9 homes)
80%
Major dwellings approved
10 decided (10+ homes)
93%
Change of use approved
46 decided
1,973
Total decisions
234 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.

Freehold owner: Information produced by HM Land Registry. © Crown copyright 2026. Source: HM Land Registry, UK and overseas companies that own property in England and Wales, September 2026 release.