7 Third Avenue Chelmsford Essex CM1 4EX

This site has had 2 applications since 2026: 1 approved, 0 refused.

• 26/00611/NMAT/1 Decided

  7 Third Avenue Chelmsford Essex CM1 4EX

  Non Material Amendment for planning permission - 26/00611/FUL - (Single storey rear extension and loft conversion including velux windows to front and a rear dormer) Existing stairway window: Retention of the existing side window opening, with the existing window replaced by a fixed, single-pane clear-glazed unit. The existing opening, size and position are retained. The replacement window is to be fixed rather than opening for safety reasons adjacent to the proposed staircase. Rear dormer: Adjustment of the front face of the approved rear dormer by approximately 150 mm to align with and bear directly onto the existing masonry wall below, following detailed structural coordination. The approved dormer parapet, roof form and overall design remain otherwise unchanged.

  Submitted 22 Sep 2026

1. 19 May 2026

   Received by Chelmsford

2. 13 Jul 2026

   Decision issued: Permitted

3. 23 Jul 2026

   Added to PlanIndex

1 later application on the register refers to this one:

• 26/00611/NMAT/1 Decided

  7 Third Avenue Chelmsford Essex CM1 4EX

  Non Material Amendment for planning permission - 26/00611/FUL - (Single storey rear extension and loft conversion including velux windows to front and a rear dormer) Existing stairway window: Retention of the existing side window opening, with the existing window replaced by a fixed, single-pane clear-glazed unit. The existing opening, size and position are retained. The replacement window is to be fixed rather than opening for safety reasons adjacent to the proposed staircase. Rear dormer: Adjustment of the front face of the approved rear dormer by approximately 150 mm to align with and bear directly onto the existing masonry wall below, following detailed structural coordination. The approved dormer parapet, roof form and overall design remain otherwise unchanged.

Chelmsford granted permission on 13 July 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

• 5 Third Avenue Chelmsford CM1 4EX

  18/01954/FUL Submitted 30 Nov 2018 50 yards away

  Single storey rear and two storey side extension.

  Granted Full applications Extension 11 docs
  Small domestic

• 5 Third Avenue Chelmsford CM1 4EX

  19/01030/FUL Submitted 12 Jun 2019 50 yards away

  Single storey rear and two storey side extension

  Granted Full applications Extension 11 docs
  Small domestic

• 5 Third Avenue Chelmsford Essex CM1 4EX

  18/00080/HHPA Submitted 4 Dec 2018 50 yards away

  The construction of a single storey rear extension, which would extend beyond the rear wall of the original house by a maximum depth of 6m, for which the maximum height would be 3.25m, and for which the height of the eaves would be 2.9m.

  Refused Full applications Extension 9 docs
  Small domestic

• 5 Third Avenue Chelmsford Essex CM1 4EX

  18/00076/HHPA Submitted 12 Nov 2018 50 yards away

  The construction of a single storey rear extension, which would extend beyond the rear wall of the original house by a maximum depth of 6m, for which the maximum height would be 4m, and for which the height of the eaves would be 3m.

  Withdrawn Full applications Extension 7 docs
  Small domestic

• 5 Third Avenue Chelmsford Essex CM1 4EX

  19/00010/HHPA Submitted 6 Feb 2019 50 yards away

  The construction of a single storey rear extension, which would extend beyond the rear wall of the original house by a maximum depth of 6m, for which the maximum height would be 3m, and for which the height of the eaves would be 2.9m.

  Refused Full applications Extension 9 docs
  Small domestic

• 20 Fourth Avenue Chelmsford Essex CM1 4HA

  23/00236/CLOPUD Submitted 9 Feb 2023 50 yards away

  Part garage conversion.

  Granted Outline 5 docs

• 26/01439/FUL Awaiting decision

  Chimera Moor Hall Lane Bicknacre Chelmsford Essex CM3 4ER

  Single storey rear extension

  Full applications
• 26/01433/FUL Awaiting decision

  106 The Street Little Waltham Chelmsford Essex CM3 3NT

  Demolition of existing conservatory and construction of single storey rear extension. Ground source heat pump and battery for electricity storage.

  Full applications
• 26/01374/FUL Awaiting decision

  The Cottage Chignal Road Mashbury Chelmsford Essex CM1 4GP

  Erection of detached workshop and studio

  Full applications
• 26/01428/FUL Awaiting decision

  Westbourne The Causeway Great Baddow CM2 7JX

  Alterations to rear elevations including a new roof and extension of roof overhang.

  Full applications
• 26/01402/FUL Awaiting decision

  74A Brock Hill Runwell Wickford SS11 7NR

  Retrospective planning application for the in filling of an existing man-made pond

  Full applications