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Quote first on rear extension planning applications

386,394 Rear Extension applications on record across the UK

Sample Rear Extension applications

  • ZE25/01266/FULRyedaleErection of single story rear extension
  • AW/265/25/HHArunPart single storey, part double storey rear extension with garage.
  • 25/1647/FULHertsmereChange of use from residential institution (Use Class C2) to single detached dwellinghouse (Use Class C3) with construction of part single, part two storey rear extension and replacement of existing attached garage with two storey side extension, and alterations to fenestration.

Every rear extension starts with a homeowner who wants more room and a planning application that says exactly where, how big and when. You get that application the day the council publishes it. You call, write or knock first. You quote while the homeowner is still choosing who to hire, not after three other firms have already priced the job.

Planning Signal tracks more than 380,000 rear extension applications on record across 400+ UK councils in England, Scotland, Wales and Northern Ireland. New ones arrive every working day, in every corner of the country, and each one is a client with a budget and a deadline.

Your diary fills before the tender opens

The planning stage is the moment the project is real but the team is not yet chosen. The drawings exist. The budget is set. The homeowner has committed. That is when a confident first approach lands the work. Each morning one email shows you the new rear extension projects in your areas, with everything you need to make the first approach. You pick the jobs you want, get in early and fill your diary months ahead.

What counts as a Rear Extension application

A rear extension application is any proposal to build out from the back of a house. Every one is a homeowner with a budget, a design and a reason to hire. Here is what lands in your inbox and what each type means for you.

Single storey rear extensions put you on the most jobs

The single storey rear extension is the workhorse of the residential market. Kitchen extension planning drives most of it: open-plan kitchen-diners, family rooms, utility rooms and downstairs bathrooms. For you that means foundations, blockwork, a flat roof with a lantern or a pitched roof with rooflights, wide glazed doors and a full kitchen fit. Fast to price, fast to build and steady in volume.

Two storey rear extensions carry the bigger contracts

A two storey rear extension adds a bedroom or bathroom above the new ground floor room. Expect structural steel, a new roof tied into the existing one, more windows and more internal finishing. The contract value is higher and every trade spends longer on site.

Side return and wraparound builds reward terrace specialists

A side return extension fills the narrow passage beside a terraced house and opens the kitchen across the full width of the plot. Wraparound designs join the side return to a rear extension in an L-shape. Both mean glass roofs, steel beams and party wall work, which rewards specialist glaziers and experienced terrace builders.

Householder applications and prior approvals both put work in front of you

Most projects arrive as a householder extension application. In England, larger single storey rear extensions also arrive as prior approval notifications. You receive both. Amended schemes, resubmissions after refusal and applications to vary approved drawings show you live projects where the homeowner is still deciding details, and still open to the right firm.

Who tracks Rear Extension applications

A rear extension is not one job. It is a dozen, and every business below wins its share by reaching the homeowner before the decision on who to hire is made.

Builders win the main contract

General builders and extension specialists take the whole project, from groundworks to final decoration. The application gives you the address, the scope and the size before anyone else has priced it. Write to the homeowner, offer a site visit and put a clear quote on the table while competitors are still waiting for a referral.

Specialist contractors get booked early

Groundworkers, steel fabricators, roofers, plasterers, electricians and heating engineers all follow the builder onto site. Contact the agent and the homeowner as soon as the application is published and you are in the programme before the first trench is dug.

Manufacturers and suppliers get specified

Glazing and bifold door makers, rooflight manufacturers, kitchen companies, flooring and underfloor heating suppliers and builders' merchants all win when their product goes into the drawings. The description of the work tells you which projects carry large glazed openings, roof lanterns or open-plan kitchens. Approach the homeowner and the architect while the specification is still open.

Architects and consultants land the next stage

Planning approval is the start of the professional work, not the end. Structural engineers win the calculations for building regulations. Party wall surveyors win the notices and awards on every boundary extension. Architectural technicians win the building regulations drawings where the planning drawings came from another firm or straight from the homeowner. Each application is a client who needs you next.

How Planning Signal helps with Rear Extension applications

Leads sends you new planning applications that match your keywords the day councils publish them, in one email a day. Set keywords such as rear extension, side return or two storey and you see exactly the projects you want to win, nationwide or in the areas you choose.

Every lead gives you what you need to make contact

Each lead carries the planning reference, site address, council, the description of the work, application type, key dates, decision status and a link to the council's own record. Wherever the council publishes them, you also get the applicant, the agent firm and a business contact. That is enough to write, call or visit the same morning.

Cover your patch or the whole country

Choose up to 5 areas. Each one is a radius of up to 75 miles from a postcode or town, or a whole council. A builder covers the home county. A glazing manufacturer takes the whole UK and sees every match in one place.

Track every job from first contact to signed contract

The built-in lead pipeline records who you contacted, who you quoted and which jobs you won. Leads also includes everything in Research: search, advanced filters and CSV export, so you work the back catalogue of approved schemes as well as the daily email.

Leads costs £49 + VAT a month. One won extension pays for it many times over.

Watching your own street? Alerts are free

Anyone gets free email alerts for planning applications near an address, postcode, town or council. Homeowners and neighbours see what is proposed next door as soon as it is published.

Frequently asked questions

Are these builder leads extensions only, or do suppliers use them too?
Both. Builders use them to win the main contract. Glazing, rooflight, door and kitchen firms use the same leads to get specified before the builder buys. Architects, structural engineers and party wall surveyors use them to offer the next professional service the homeowner needs. One application gives you several jobs to win.
What do I do when the council doesn't publish the applicant's name?
Write to the homeowner at the site address, which every lead carries. A short, personal letter that names the project and offers a quote lands on the right doormat. Where an agent firm is listed, contact the architect directly: they shape the specification and recommend builders to their clients.
How should I approach a homeowner at the planning stage?
Lead with their project, not your company. Mention the extension by its description, show photos of similar builds you have finished nearby and offer a site visit. Homeowners at this stage want reassurance and a realistic price. Be first, be specific and follow up when the decision status changes.
Is a refused application worth my time?
Yes. A refusal tells you the homeowner wants the space badly enough to have paid for drawings and a fee. They revise and resubmit or appeal. Get in touch with a practical view of what makes the scheme work and you become the firm they trust when approval arrives.
Can I use Leads for more than rear extensions?
Yes. Planning Signal covers every kind of planning application, and this page shows one kind of work. Add keywords for loft conversions, garage conversions, porches, new homes or commercial fit-outs and every match arrives in the same daily email. Build your keyword list from the work you want to win.
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Looking for a step-by-step guide?

The statistics and application data above track live planning submissions. For a practical how-to guide (including what forms to submit, timelines, costs and exemptions), see our dedicated planning guide:

Rear Extension: Complete Planning Guide →

Trades looking for Rear Extension leads

Planning Signal Leads delivers rear extension applications directly to tradespeople as councils publish them.