91 Thamesdale London Colney Hertfordshire Al2 1Tb

1. 13 Mar 2026

   Received by St Albans

2. 16 Mar 2026

   Validated

   Checked as complete and ready for consideration.

3. 13 Jul 2026

   Decision issued: DC3 Conditional Permission

4. 31 Aug 2026

   Added to PlanIndex

The council has decided this application; the published outcome sits in the record above and the decision notice on the council portal carries the detail, including any conditions.

If permission was granted, work must normally begin within three years of the decision. If it was refused, the applicant can appeal within the statutory time limit or submit a revised scheme.

Householder applications cover work to an existing house and its garden: extensions, loft and garage conversions, porches, outbuildings and similar alterations within the boundary of the home. They cannot be used to create a separate dwelling or change what the building is used for. Councils aim to decide them within eight weeks, and immediate neighbours are usually notified and given a chance to comment.

More on householder applications in our guide

• The Colney Fox 1 Barnet Road London Colney Hertfordshire Al2 1Bl

  5/2026/0637 Submitted 27 Mar 2026 170m away

  Advertisement Consent - Display of three externally illuminated fascia signs, two new externally illuminated double sided pictorial hanging signs, one set of individual letters with new trough light, one new non-illuminated double-legged single-sided sig

  Decided Advertising 11 docs

• Ridgeview Lodge Barnet Road London Colney Hertfordshire

  5/2017/2787 Submitted 3 Oct 2017 176m away

  Certificate of Lawfulness (existing) - Construction of part of a road associated with the consented retail development

  Granted Lawful development 10 docs

• 8 Willowside London Colney Hertfordshire Al2 1Dp

  5/2017/1794 Submitted 22 Jun 2017 309m away

  Single storey extension and porch to side elevation, new conservatory to rear elevation

  Decided Householder Extension 23 docs
  Small domestic

• Waterside House Waterside London Colney Hertfordshire Al2 1Qx

  5/2016/3095 Submitted 12 Oct 2016 362m away

  Rear conservatory

  Refused Householder Extension 14 docs
  Small domestic

• Unit 1 Riverside Industrial Estate London Colney Bypass London Colney Hertfordshire Al2 1Hj

  5/2026/1178 Submitted 18 Jun 2026 373m away

  Prior Approval – Demolition of Unit 1 comprises a singular rectangular industrial building with a service yard and hardstanding area for vehicle parking. The building extends to approximately 6,409.87 sqm and is of steel portal frame construction. The bui

  Refused Prior approval Demolition 9 docs

• Unit 1 Riverside Industrial Estate London Colney Bypass London Colney Hertfordshire Al2 1Hj

  5/2026/1478 Submitted 4 Aug 2026 373m away

  Prior Approval - Demolition of building, site clearance and restoration

  Decided Prior approval Demolition 6 docs

• 5/2026/1173 Decided

  6 Longacres St Albans Hertfordshire Al4 0Dr

  Demolition of existing outbuilding and construction of single storey rear extension

  18 Jun 2026 Householder
• 5/2026/0299 Decided

  12 Rowlatt Drive St Albans Hertfordshire Al3 4Nb

  Demolition of existing side and rear extension and construction of a canopy porch, part single, part two storey front, two storey side and single storey rear extension

  17 Feb 2026 Householder
• 5/2026/0318 Refused

  7 Ardens Way St Albans Hertfordshire Al4 9Uw

  Demolition of existing side canopy, detached garage, rear patio and garden shed and the construction of two storey front, side and rear extensions, together with part single storey rear extension and a front porch canopy and extension to driveway

  19 Feb 2026 Householder
• 5/2026/1139 Decided

  50 Fontmell Close St Albans Hertfordshire Al3 5Hu

  Single storey rear extension and side windows with top openers over 1.7m high

  10 Jun 2026 Householder
• 5/2026/0525 Decided

  11 Hillside Road Harpenden Hertfordshire Al5 4Bs

  Garage conversion, with part roof extension and new front porch extension

  17 Mar 2026 Householder