House extensions in Harlow

Harlow received 202 householder applications in the last 12 months - about 4 a week. Rear extensions and garage works are the most common. Of the 169 decided so far, 154 were approved. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

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Showing 50 of 53 applications
22 Oct 2026 Pending HW/FUL/26/00431

Unit 4 Midas River Way Harlow Essex CM20 2GJ

Installation of a fixed metal escape ladder extending from the existing roof level to ground level on the rear corner elevation of the building

Full Application Harlow
20 Oct 2026 Pending HW/FUL/26/00420

Gravelpit Spring Newhall London Road Harlow Essex

Installation of a 1.8 metre high perimeter security fence around Gravel Pit Spring Wood

Full Application Harlow
20 Oct 2026 Pending HW/LDCP/26/00418

89 Ashworth Place Harlow Essex CM17 9PW

Loft conversion with rear dormer and front facing roof lights

Lawful Development Cert - Proposed Harlow
16 Oct 2026 Pending HW/HSE/26/00417

292 Halling Hill Harlow Essex CM20 3JU

Proposed front access vehicular hardstand

Householder Application Harlow
13 Oct 2026 Pending HW/HSE/26/00411

2 Herons Wood Harlow Essex CM20 1RN

Conversion of existing garage to ancillary residential accomodation

Householder Application Harlow
13 Oct 2026 Pending HW/HSE/26/00410

1 East Park Harlow Essex CM17 0SF

Retrospective consent is sought for the construction of a single storey rear extension and erection of garden room in the rear garden

Householder Application Harlow
9 Oct 2026 Pending HW/HSE/26/00407

56 Lodge Hall Harlow Essex CM18 7SY

Proposed front access ramp

Householder Application Harlow
7 Oct 2026 Pending HW/HSE/26/00400

227 Fold Croft Harlow Essex CM20 1SF

Erection of a single storey front extension

Householder Application Harlow
7 Oct 2026 Pending HW/HSE/26/00401

1 Hadley Grange Harlow Essex CM17 9PQ

Installation of a front access modular ramp

Householder Application Harlow
30 Sept 2026 Pending HW/LBC/26/00321

1 - 36 The Lawn Harlow Essex CM20 2JX

External and Internal Refurbishment and Fire Safety Remedial Works

Listed Building Consent Harlow
30 Sept 2026 Pending HW/FUL/26/00320

1 - 36 The Lawn Harlow Essex CM20 2JX

External and Internal Refurbishment and Fire Safety Remedial Works

Full Application Harlow
28 Sept 2026 Pending HW/LBC/26/00351

Mark Hall And Netteswell Community Association Moot House The Stow Harlow Essex CM20 3AG

Renovation and restoration remedial works to 9 no. existing windows at ground and first floor levels at Moot House

Listed Building Consent Harlow
22 Sept 2026 Pending HW/LDCP/26/00385

Holy Cross Roman Catholic Primary School Tracyes Road Harlow Essex CM18 6JJ

Construction of a single storey extension to provide new entrance, waiting area, toilet and meeting room

Lawful Development Cert - Proposed Harlow
22 Sept 2026 Approved 22 Oct HW/PALHE/26/00384

17 Elmbridge Harlow Essex CM17 0JU

Erection of a single storey rear extension

Prior Approval Larger Householder Extens Harlow
22 Sept 2026 Pending HW/HSE/26/00359

4 Bury Road Harlow Essex CM17 0ED

Relandscape of front garden and the replacement of wooden to wrought Iron fencing

Householder Application Harlow
22 Sept 2026 Pending HW/HSE/26/00383

203 Arkwrights Harlow Essex CM20 3NB

Erection of front porch and installation of new window to front elevation at first floor level

Householder Application Harlow
21 Sept 2026 Pending Decision HW/HSE/26/00265

12 Hilly Field Harlow Essex CM18 7HU

Construction of a side extension with associated Internal and external Works

Householder Application Harlow
21 Sept 2026 Pending HW/FUL/26/00381

Holy Cross Roman Catholic Primary School Tracyes Road Harlow Essex CM18 6JJ

Removal of existing fencing and gates, replaced with 2.4m high twin-wire fencing & gates and CCTV mounted on poles

Full Application Harlow
18 Sept 2026 Approved 22 Oct HW/PALHE/26/00378

186 Wharley Hook Harlow Essex CM18 7DZ

Erection of a single-storey rear extension

Prior Approval Larger Householder Extens Harlow
18 Sept 2026 Pending Decision HW/LDCP/26/00379

72 Arkwrights Harlow Essex CM20 3LU

Siting of a mobile home on residential land for ancillary residential use

Lawful Development Cert - Proposed Harlow
17 Sept 2026 Pending HW/HSE/26/00376

79 Little Grove Field Harlow Essex CM19 4BX

Erection of single storey rear extension to include a utility room, toilet and shower

Householder Application Harlow
17 Sept 2026 Approved 15 Oct HW/DEM/26/00380

Garage 1 Altham Grove Harlow Essex

Demolition of existing garage block 1-12 Altham Grove

Demolition Notification Harlow
15 Sept 2026 Pending HW/HSE/26/00372

74 Silvesters Harlow Essex CM19 5NW

Replacement of conservatory with erection of a single storey rear extension

Householder Application Harlow
14 Sept 2026 Pending HW/HSE/26/00370

18 Kingsmoor Road Harlow Essex CM19 4HP

Replacement of existing double garage, alterations to fenestration, and installation of a new entrance canopy

Householder Application Harlow
14 Sept 2026 Approved 6 Oct HW/PALHE/26/00371

81 Stile Croft Harlow Essex CM18 6LP

Construction of a single storey rear extension

Prior Approval Larger Householder Extens Harlow
11 Sept 2026 Pending HW/FUL/26/00367

25 Radburn Close Harlow Essex CM18 7ED

Retrospective planning application is sought for the retention of a detached outbuilding within the rear garden of 25 Radburn Close

Full Application Harlow
10 Sept 2026 Pending HW/HSE/26/00366

4 Doulton Close Harlow Essex CM17 9RG

Conversion of existing integral garage into a home office

Householder Application Harlow
8 Sept 2026 Pending HW/HSE/26/00362

10 Cock Green Harlow Essex CM19 4HW

Construction of an additional storey above existing bungalow and single storey porch extension

Householder Application Harlow
8 Sept 2026 Pending HW/HSE/26/00365

13A Monksbury Harlow Essex CM18 7TA

Construction of a ground floor bedroom and bathroom extension with a front entrance access ramp

Householder Application Harlow
4 Sept 2026 Approved 21 Oct HW/HSE/26/00360

5 Deer Park Harlow Essex CM19 4LB

Integral garage conversion and enclosure of covered porch area

Householder Application Harlow
2 Sept 2026 Pending HW/HSE/26/00137

16 Bury Road Harlow Essex CM17 0ED

Roof replacement

Householder Application Harlow
31 Aug 2026 Approved 17 Sep HW/LDCP/26/00352

30 Blackbush Spring Harlow Essex CM20 3DY

Construction of a single storey rear extension

Lawful Development Cert - Proposed Harlow
31 Aug 2026 Approved 19 Oct HW/HSE/26/00353

14 Hawkenbury Harlow Essex CM19 4HY

Erection of a single storey rear side infill extension

Householder Application Harlow
28 Aug 2026 Approved 22 Oct HW/LDCP/26/00349

63 Peterswood Harlow Essex CM18 7RJ

Conversion of existing garage to a habitable space

Lawful Development Cert - Proposed Harlow
26 Aug 2026 Approved 15 Oct HW/FUL/26/00348

5 Ladyshot Harlow Essex CM20 3EJ

Construction of a single storey rear extension and front entrance porch

Full Application Harlow
25 Aug 2026 Approved 16 Oct HW/HSE/26/00347

210 Hollyfield Harlow Essex CM19 4NG

Proposed front access ramp

Householder Application Harlow
24 Aug 2026 Approved 19 Oct HW/HSE/26/00341

88 Collins Meadow Harlow Essex CM19 4EL

Construction of a two-storey rear extension and replacement of the attached garage

Householder Application Harlow
21 Aug 2026 Approved 14 Oct HW/HSE/26/00340

13 Brambling Crescent Harlow Essex CM17 0GF

Retrospective permission for erection of a single storey rear extension

Householder Application Harlow
18 Aug 2026 Approved 12 Oct HW/HSE/26/00334

63 Stackfield Harlow Essex CM20 2LD

Erection of a side extension with internal mezzanine floor

Householder Application Harlow
17 Aug 2026 Approved 16 Sep HW/PALHE/26/00331

115 Chelsea Gardens Harlow Essex CM17 9RY

Demolition of existing conservatory and erection of new 4m deep extension

Prior Approval Larger Householder Extens Harlow
14 Aug 2026 Approved 21 Oct HW/HSE/26/00330

13 Huntley Road Harlow Essex CM20 2PR

Construction of a single storey side extension to join house and garage

Householder Application Harlow
13 Aug 2026 Approved 5 Oct HW/FUL/26/00327

H S S Hire Group Plc Harmony Works Edinburgh Way Harlow Essex CM20 2DH

Alteration to existing shopfront with installation of condenser units, retractable awning, LED signage and wall lights

Full Application Harlow
13 Aug 2026 Approved 5 Oct HW/FUL/26/00322

154 Dads Wood Harlow Essex CM20 1JQ

Replacement windows and door

Full Application Harlow
11 Aug 2026 Approved 2 Oct HW/LDCP/26/00324

74 Ashworth Place Harlow Essex CM17 9PW

Construction of a single storey rear extension projecting 3m from the rear elevation, with a flat roof incorporating a roof lantern. Loft conversion i...

Lawful Development Cert - Proposed Harlow
10 Aug 2026 Pending HW/HSE/26/00212

28 Stackfield Harlow Essex CM20 2LB

Inserting a dropped curb to the front of the property

Householder Application Harlow
10 Aug 2026 Approved 17 Sep HW/LDCP/26/00323

Flat Block 58 To 62 The Chase Newhall Harlow Essex CM17 9JA

Replacement cladding to external of building

Lawful Development Cert - Proposed Harlow
7 Aug 2026 Approved 2 Oct HW/HSE/26/00318

7 Herons Wood Harlow Essex CM20 1RW

Construction of side and rear extensions. Increase in roof ridge height to form first floor accommodation and insertion of 6 no. rooflights

Householder Application Harlow
6 Aug 2026 Approved 8 Oct HW/HSE/26/00308

3 Doulton Close Harlow Essex CM17 9RG

Loft conversion

Householder Application Harlow
5 Aug 2026 Approved 22 Sep HW/HSE/26/00309

7 Greenfinch Way Newhall Harlow Essex CM17 9FT

Construction of a side facing subordinate dormer for a loft conversion with 4 roof slope skylight windows

Householder Application Harlow
5 Aug 2026 Approved 22 Sep HW/LDCP/26/00311

18 Whitewaits Harlow Essex CM20 3LJ

Construction of a single-storey rear extension and loft conversion incorporating a rear-facing box dormer, removal of chimney

Lawful Development Cert - Proposed Harlow
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Frequently asked questions

When do you need planning permission for a house extension?
Single-storey rear extensions up to 4m (detached) or 3m (semi-detached / terraced) are usually permitted development. Two-storey extensions, anything in a conservation area, or larger projects almost always need a planning application.
What's the difference between planning permission and permitted development?
Permitted development rights let you build certain things without applying for planning permission, subject to specified limits. Anything outside those limits, whether taller, larger or in a protected area, needs full planning permission.
How long does a householder application take?
The statutory target is 8 weeks from validation. Most simple householder extensions are decided within that window; complex or contested cases, especially those drawing a lot of comments, can take longer.
Can I get email alerts for new extensions applications in Harlow?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new extensions application published by Harlow. You can also narrow the alert to a postcode, street, or drawn area.

We check Harlow's planning portal daily. New extensions applications appear here within a day of being published.