12 Roundwood Park Harpenden Hertfordshire Al5 3Ab

1. 28 Apr 2021

   Received by St Albans

2. 29 Apr 2021

   Validated

   Checked as complete and ready for consideration.

3. 30 Jun 2021

   Decision issued: DC3 Conditional Permission

4. 25 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

• 8 Roundwood Park Harpenden Hertfordshire Al5 3Ab

  5/2016/3102 Submitted 13 Oct 2016 0m away

  Certificate of Lawfulness (proposed) - Rear infill extension

  Refused Lawful development Extension 6 docs

• 15 Roundwood Park Harpenden Hertfordshire Al5 3Ab

  5/2017/2645 Submitted 19 Sep 2017 0m away

  Single storey rear extension with rooflights following removal of conservatory, first floor side extension and alterations to roof incorporating new gable to front and dormers to rear to facilitate conversion of loft space to habitable accommodation, conv

  Withdrawn Extension Loft or dormer 12 docs
  Small domestic

• 2 Roundwood Gardens Harpenden Hertfordshire Al5 3Aj

  5/2017/2568 Submitted 7 Sep 2017 107m away

  Replacement dwelling with associated landscaping

  Decided 22 docs
  Domestic

• 28 Moreton End Lane Harpenden Hertfordshire Al5 2Hd

  5/2026/0567 Submitted 23 Mar 2026 149m away

  Conversion of garage and first floor side extension

  Refused Householder Extension 14 docs
  Domestic

• 32A Moreton End Lane Harpenden Hertfordshire Al5 2Hd

  5/2026/0964 Submitted 18 May 2026 149m away

  Garage conversion to habitable room and front dormers with hipped roofs

  Decided Householder Loft or dormer 25 docs
  Small domestic

• 7 Claygate Avenue Harpenden Hertfordshire Al5 2He

  5/2017/2509 Submitted 3 Sep 2017 167m away

  Raising and alterations to roof from gable to hipped incorporating loft conversion with rear dormer window, single and two storey front and rear extensions, alterations to openings and installation of rooflights

  Decided Householder Extension Loft or dormer +1 12 docs
  Domestic

• 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