SEETHING HOUSE, 23 Mill Street, Mattishall, Dereham, Norfolk, NR20 3QG Data via plota.co.uk
Proposal
Retention of existing outbuilding utilised as an ancillary residential annexe to main dwelling (retrospective) Data via plota.co.uk
Application progress
Refused on 30 Mar 2026 · Delegated decision · Last checked 1 Oct 2026
Documents 16
Decision & officer reports 2
Statements & assessments 5
Plans & drawings 4
Application forms 1
Consultation & comments 2
Site constraints 6
Checked on 6 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 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
From the energy performance certificate lodged in October 2013, 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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Important details
- Council
- Breckland
- Application type
- FMIN minor application
- Postcode
- NR20 3QG
- Received
- 9 Jan 2026
- Validated
- 30 Jan 2026
- Ward
- Mattishall
- Parish
- Mattishall
- Case officer
- Show
- Target decision
- 27 Mar 2026
- Decision
- Refused
- Decision date
- 30 Mar 2026
- Decision level
- Delegated decision
- Applicant
- Show
- Agent
- Vivid Infrastructure UK Limited
How this decision compares
Decided in 59 days from validation, 18 days slower than Breckland's median of 41 for extensions. Refused, as 3% of extensions here are.
Plota live figures for extensions decided by Breckland in the last twelve months, from validation. Breckland decision record →
Consultation & key dates
- Statutory expiry
- 27 Mar 2026
Historical activity at this location
27 previous applications on record - archival context, not part of the live application.
Previous applications at this address
Nearby activity
Breckland is faster than most councils at deciding householder applications, ranking #32 out of 296. Householder applications are more likely to be approved here than most councils, with a 98% approval rate vs 90% nationally.
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.
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SEETHING HOUSE, 23 Mill Street, Mattishall, Dereham, Norfolk, NR20 3QG
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