Seething House, 23 Mill Street, Mattishall, Dereham, Norfolk, NR20 3QG
Proposal
Retention of existing outbuilding utilised as an ancillary residential annexe to main dwelling (retrospective)
- Received
- 9 January 2026
- Council
- Breckland District Council
- Ward
- Mattishall
- ReceivedReceived9 Jan
- ValidatedValidated
- Consult.Consultation
- TargetTarget Date
- DecidedDecided
Have your say
About this application
This is a full planning application for an outbuilding at Seething House, 23 Mill Street, Mattishall, Dereham, Norfolk, NR20 3QG. Breckland has handled 2,146 applications of this type. It has been with the council since 9 January 2026 and is still awaiting a decision. The site is in the Mattishall conservation area. There are no previous applications recorded at this address. In the past year there have been 54 applications across Mattishall. We hold 1,323 applications in total for the NR20 postcode area.
91% of full applications at Breckland District 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
- NR20 3QG
- Application type
- FMIN minor application
- Parish
- Mattishall
Planning application dates
- Validated
- 9 January 2026
Site constraints
Designations at the address point. Ones next to the site may also apply.
- Conservation area: Mattishall
- Nutrient neutrality catchment: Yare Broads and MarshesApplies 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. Ask the council if these matter.
Possibly incomplete for this council: tree preservation orders.
Also checked, none recorded (20)
flood storage 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: Breckland
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Planning something similar?
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