20 Halnaby Avenue Darlington DL3 8UH
Approved on 12 December 2025
Council decision: PERMITTED DEVELOPMENTDelegated (officer decision)
Proposal
Certificate of Lawfulness for proposed development - Erection of a single storey rear extension including the addition of 5-no. roof lights (amended description)
- Received
- 28 November 2025
- Decision level
- Delegated (officer decision)
- Council
- Darlington Borough Council
- Ward
- Hummersknott
- Agent
- P A Designs Architects Limited
- ReceivedReceived28 Nov
- ValidatedValidated2 Dec
- Consult.Consultation
- TargetTarget Date23 Jan
- DecidedDecided12 Dec
Decided in 10 days (council typically 42)
About this application
This is an outline application for a single storey rear extension at 20 Halnaby Avenue Darlington DL3 8UH. Darlington has handled 73 applications of this type. This one was decided in 14 days, 4 weeks quicker than Darlington's typical decision time. There are no previous applications recorded at this address. In the past year there have been 10 applications across Hummersknott. We hold 387 applications in total for the DL3 postcode area.
94% of outline applications at Darlington Borough Council were approved. Across all application types, the council typically decides in about 6 weeks (median).
Based on decided applications received in the last 3 years.Planning something similar? See what gets approved on your street
Application details
- Postcode
- DL3 8UH
- Application type
- Proposed Lawful Use
- Scale / size
- Small
- Parish
- Darlington Urban Area
Planning application dates
- Date validated
- 2 December 2025
- Target decision date
- 23 January 2026
Applicant and agent
- Agent
- P A Designs Architects Limited
- Architect profile
- P A DESIGNS ARCHITECTS LTD
- Agent address
- P A Designs Architects Limited 95 Fulthorpe Avenue Darlington Co. Durham DL3 9XJ
Planning decision
- Statutory period
- 52 days
Site constraints
Designations that overlap or adjoin the site outline.
- Nutrient neutrality catchment: Teesmouth and Cleveland Coast SPA/RamsarApplies to new homes and overnight accommodation
- Flood zone 1: Low probability (rivers and sea)
Not published by this council, so not checked: Article 4 directions and tree preservation orders. Ask the council if these matter.
Also checked, none recorded (21)
flood storage areas, conservation areas, listed buildings, green belt, scheduled monuments, World Heritage Sites, World Heritage Site buffer zones, registered parks and gardens, registered battlefields, Heritage at Risk entries, national parks, National Landscapes, SSSIs, Special Areas of Conservation, Special Protection Areas, Ramsar sites, ancient woodland, national nature reserves, local nature reserves, heritage coasts and brownfield registers.
A guide only, from official open data; it is not a planning search. Flood zones cover rivers and sea, not surface water.
Data © Crown copyright and others · sources and licences
Contains public sector information from planning.data.gov.uk (MHCLG and local planning authorities), licensed under the Open Government Licence v3.0. © Crown copyright and database right 2026.
© Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. The Historic England GIS Data contained in this material was obtained on 2026-11-03. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.
© Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right 2026.
© Environment Agency copyright and/or database right 2026. All rights reserved. Flood Map for Planning, Open Government Licence v3.0.
Contains Ordnance Survey data © Crown copyright and database right 2026.
Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.
Source: Darlington
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For applicants and trades
Contractors near this project
Find contractors for extensions near this site- David Ryan Plumbing And Merrybent Bathrooms LimitedDarlington0.5 mi
- Mann Electrotechnical LtdElectrician0.6 mi
- DH Electrical & Mechanical LtdElectrician0.9 mi
- Select Electrical NE LtdElectrician1.1 mi
Planning something similar?
See what the council approved and refused for single-storey rear extensions on your street. Pick your home and get the evidence before you pay for drawings.