26 Perry Street Northampton NN1 4HW

1. 27 Jul 2026

   Received by West Northamptonshire

2. 13 Aug 2026

   Validated

   Checked as complete and ready for consideration.

3. 15 Aug 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 8 October 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   West Northamptonshire took a median of 67 days over the applications it decided in the last year.

This application is with West Northamptonshire for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.

The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

• 36 Derby Road, Northampton, NN1 4JS

  2024/5311/FULL Submitted 14 Nov 2024 127m away

  Proposed single storey rear extension - amendment to 2024/1973/PA

  Granted Full applications Extension 13 docs
  Small domestic

• 59 Bostock Avenue Northampton NN1 4LN

  2025/3672/LDE Submitted 11 Aug 2025 143m away

  Lawful development certiticate (existing) for use of property as 6-bedroom, 7-person Sui Generis House in Multiple Occupation (HMO)

  Granted Lawful development 16 docs

• 97 Adams Avenue, Northampton, NN1 4LJ

  2024/4128/FULL Submitted 28 Aug 2024 146m away

  Change of use of dwellinghouse (Use Class C3) to House in multiple occupation (Use Class C4) for 5 occupants

  Refused Full applications 24 docs
  Domestic

• 95 Adams Avenue Northampton NN1 4LJ

  2026/0918/LDE Submitted 23 Feb 2026 146m away

  Lawful development certificate (existing) for use of the property as a 5 bedroom house in multiple occupation

  Granted Lawful development 7 docs

• 1 Derby Road Northampton NN1 4JP

  2026/0629/FULL Submitted 13 Feb 2026 147m away

  Conversion of dwelling [Use Class C3] to House in multiple occupation [Use Class C4] for 6 Occupants including single storey rear & side extension

  Granted Full applications Extension 23 docs
  Small domestic

• 45 Derby Road Northampton NN1 4JP

  2026/1873/FULL Submitted 20 Apr 2026 147m away

  Single storey rear extension

  Granted Full applications Extension 7 docs
  Small domestic

• 2026/2780/LDP Granted

  3 Hunt Close Towcester NN12 7AD

  Lawful development certificate (proposed) for demolition of existing conservatory and construction of a single storey rear extension

  26 Jun 2026 Lawful development
• 2026/2296/LDP Granted

  19 Deanshanger Road Wicken MK19 6BS

  Lawful development certificate (proposed) for construction of outbuilding

  22 May 2026 Lawful development
• 2026/1969/LDP Granted

  7 Bickerstaffes Road Towcester NN12 6EG

  Garage conversion

  27 Apr 2026 Lawful development
• 2026/2401/LDP Granted

  Stoneacre The Green Marston St Lawrence OX17 2DB

  Lawful development certificate (proposed) for construction of detatched garage

  10 Jun 2026 Lawful development
• 2026/1646/LDP Refused

  36 Spinney Hill Crescent Northampton NN3 6DL

  Use of the property by up to two children living together as a single household, with care provided in a domestic setting

  30 Mar 2026 Lawful development