Sussex & Kent · house extension builders

House Extensions planning leads

Every approved house extension in Sussex and Kent appears here the week the council grants permission. Single storey, double storey, rear, side — get to the homeowner before they start searching for quotes.

12 house extensions approvals in the last 60 daysMax 3 house extension builders per council areaCheck seat availability →

Recent house extensions approvals

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Granted
14d ago

Application for a Certificate of Lawful Development for an Existing single storey rear extension

55 Cranleigh Road Worthing West Sussex BN14 7QW

Adur and Worthing

Est. value£50k–100k
ScoreHot 82
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Granted
21d ago

Demolition of rear conservatory. Construction of new single storey rear extension to replace conservatory and alterations to fenestration. Natural timber cladding to the rear ground floor elevation

Flagstones Chalkdock Lane West Itchenor Chichester West Sussex PO20 7DE

Chichester

Est. value£50k–100k
ScoreHot 81
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Granted
14d ago

Demolish existing garage and utility room. New single storey kitchen and utility extension. New gable extension to front first floor. Replace windows and doors. Internal refurbishments. Solar panels to front roof pitch.

26 Brook Lane Lindfield Haywards Heath West Sussex RH16 1SG

Mid Sussex

Est. value£50k–100k
ScoreHot 80
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Granted
36d ago

Application for a Certificate of proposed Lawful development for single-storey rear extension and alterations including juliette balcony at rear

Hastings, TN35 5HG

Hastings

Est. value£50k–100k
ScoreHot 78
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Granted
37d ago

Erection of single-storey side extension, replacement of existing single-storey rear extension, removal of rear chimney, hard landscaping and alterations to fenestration at all elevations

2 Blatchington Hill Seaford East Sussex BN25 2AQ

Lewes

Est. value£50k–100k
ScoreHot 78
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Granted
28d ago

Front extension. Conversion of garage to office/store/utility. Single storey rear extension. Rooflights to North, East, South and West roof slopes to create room in the roofspace.

179 Terringes Avenue Worthing West Sussex BN13 1JS

Adur and Worthing

Est. value£50k–100k
ScoreHot 78
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Granted
29d ago

Application to vary conditions 1 (approved plans) and 3 (materials) of AWDM/1415/24 to change the vertical tile hanging finish to new gable wall and dormer elevations to white render and windows to grey anthracite. ORIGINAL DESCRIPTION: Single storey side (East) extension, roof extension including changing front roof to gable end, East side facing dormer, rooflight to West

30 Whylands Avenue Worthing West Sussex BN13 3HA

Adur and Worthing

Est. value£50k–100k
ScoreHot 78
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Granted
9d ago

ERECTION OF A SINGLE STOREY SIDE EXTENSION.

MILL ROAD, HEATHFIELD, TN21 0XD

Wealden

Est. value£50k–100k
ScoreHot 77
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Granted
14d ago

Proposed first floor extension and extension to the rear and internal alterations to the property.

73 Folders Lane Burgess Hill West Sussex RH15 0DY

Mid Sussex

Est. value£50k–100k
ScoreHot 77
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Granted
10d ago

Single-storey side extension

The Old Post Office London Road Hickstead Haywards Heath West Sussex RH17 5NU

Mid Sussex

Est. value£50k–100k
ScoreHot 77
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Granted
14d ago

Two-storey extension and new porch

1 Graham Road Yapton BN18 0JT

Arun

Est. value£50k–100k
ScoreHot 77
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Granted
14d ago

The proposed works includes a rear single storey extension

19 Fairfield Road Burgess Hill West Sussex RH15 8QB

Mid Sussex

Est. value£50k–100k
ScoreHot 77
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Why house extension builders use PlanLead

  • Extension approvals are the highest-volume lead type in the region — dozens granted every week
  • AI reads the drawings and writes a personalised letter referencing the actual project
  • Arrive at the site visit with an AI cost estimate already prepared
  • Max 3 extension builders per council area — your patch stays competitive

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