The extensions, conversions and new builds that force a heating rethink — plus every heat-pump application.
Be straight about this one: most domestic heat pumps are permitted development and never reach the register at all, so heat-pump applications are the thin end of this list. The volume is extensions, conversions and new dwellings — more rooms means new radiators, underfloor, or a boiler that has run out of headroom, and that conversation happens whether the homeowner planned it or not.
13,296 matching applications hit the UK register in the last 30 days — filtered down to just the councils or postcode areas you cover.
Why the register beats every other lead source
ASHP installs run £8,000–£18,000 (BUS grant softens the ask). Extensions add steady system-upgrade work.
Exactly what we match for heat pump & heating engineers
This is the real matching table, not marketing. Every lead row you receive shows its trigger, demand window and confidence — and the reasoning is printed on the row so you can sanity-check every address before it's mailed.
| Trigger | Example from the register | Demand window | Confidence | Why it matters to you |
|---|---|---|---|---|
| Kitchen extension / open-plan kitchen | Single storey rear extension to form open plan kitchen diner | 2 – 6 months | medium | a kitchen extension moves the rads and often outgrows the boiler |
| Heat pump installation | Installation of an air source heat pump to the side elevation | now – 2 months | medium | declared heat-pump intent — but a share of applications are filed by an already-appointed installer, hence medium |
| Two-storey / first-floor extension | Two storey side extension and single storey rear extension | 3 – 7 months | medium | a whole extra floor of radiators usually outgrows the existing boiler |
| Single-storey extension | Householder Planning Application - Single storey rear and side extension | 2 – 6 months | medium | an extra room means extra radiators or underfloor, and often a bigger boiler |
| New dwelling(s) / self-build | Planning Application for the erection of a two storey dwelling with garage | 4 – 9 months | medium | heating system is specified mid-build |
| Extension (storeys unspecified) | Proposed rear extension and internal alterations | 2 – 6 months | low | extensions commonly extend or upgrade the heating system — unconfirmed |
| Change of use to residential / HMO | Change of use from office (Class E) to 4 no. residential flats | 3 – 9 months | low | conversions re-plumb heating per unit — unconfirmed |
| Renovation / alterations (catch-all) | Refurbishment and alterations to existing dwelling | 1 – 6 months | low | refurbishments frequently replace the heating system — unconfirmed |
Heat-pump applications 0–2 months; extension-driven heating work 2–7 months after consent; new dwellings 4–9 months. Demand windows are measured from the expected decision date. Refused and withdrawn applications are dropped automatically. How the demand windows are built →
See what’s in your patch
Enter a full postcode to search a 5 km business radius, or name the councils or postcode districts you cover. We will run the last 90 days of the public register through the same trigger model your batches use and tell you how much matching demand is sitting in it right now.
Counts only. High and medium confidence matches, deduplicated to one line per application. The site addresses, planning references and per-row reasoning are what a subscription buys.
How it works
1. Pick your patch
The councils or postcode prefixes you cover — a town, a county, or several.2. We scan the register
Every month we cross live planning applications from 378 UK councils with the trigger model above and score the demand window.3. You get a mailing list
A deduped, mailing-house-ready CSV of "Owner/Occupier" addresses — one household, one letter, prior recipients suppressed automatically.Sample leads (anonymised)
| Trigger | Area | Property | Expected demand |
|---|---|---|---|
| Kitchen extension / open-plan kitchen | CO15 | A property near CO15 ●●● | 2 – 6 months |
| Heat pump installation | CO12 | A property near CO12 ●●● | now – 2 months |
| Two-storey / first-floor extension | CO13 | A property near CO13 ●●● | 3 – 7 months |
| Single-storey extension | CO16 | A property near CO16 ●●● | 2 – 6 months |
Real batches show the full site address, planning reference, score and reasoning. Samples are illustrative.
The rules (non-negotiable)
Start your subscription
£149/month · heat pump & heating engineers · your patch
Exclusive cover available: one heat pumps and heating systems subscriber per patch — first come, first served. If your area is already taken, we'll tell you before you pay anything.
Straight answers
Why so few heat-pump applications?
Because most of them do not need one. An air source heat pump within the permitted-development limits is installed without any application at all, so the register only shows the awkward ones — conservation areas, listed buildings, tight boundaries, flats. We would rather tell you that than sell you a heat-pump list that does not exist. What the register does show reliably is the building work that changes a heating system.
Demand Radar or the Business plan — which one do I need?
Same price, different product. Demand Radar posts you an addressed mailing list every month for one trade in your patch, with exclusive cover: it is for firms that write to homes. The Business plan is alerts, keyword rules, a dashboard and an API across any councils you name, with no addresses: it is for firms that want to know the moment something is filed and contact people their own way. If you want letters through doors, Radar. If you want a feed, Business.
Where does the data come from?
Published planning applications from the UK planning register — planning.data.gov.uk plus direct council sources, covering 378 local authorities. That register is public information. What you pay for is the trade-trigger matching, the demand-window timing, the deduplication and the suppression, not the raw fact of the applications.
How far back does the first list go?
There is no fixed cut-off date. We look back across the register and keep only the applications whose buying window for your trade is still upcoming, open or closing. In practice that means most of a first list is the last six months of live projects, plus a tail of larger builds from further back that are only now reaching your stage. Anything finished or already past its window is dropped, and each household appears once and is never sent to you twice — as is anything refused or withdrawn, unless your trade is architects and planning consultants, where a stalled application is the whole point. Whether that first list comes out bigger or smaller than the 90-day figure on the patch checker depends on how long your trade's buying window is, and it goes both ways. A long-window trade — glazing, kitchens, flooring — gets a much bigger first list, because consents from six or twelve months back are only now reaching its stage. A fast-window trade like skip hire or demolition gets a smaller one, because a nought-to-three-month window has already closed on a good share of what the checker counted. Either way later months are smaller than the first: they carry new applications only.
Why postal outreach only? Can I get phone numbers?
No, and that is deliberate. The register is published for planning transparency, not to build a calling list. We store no applicant names, so there is nothing to phone: letters are addressed to "The Owner/Occupier" at the property. Mail only — no email, no SMS, no cold calls — and every letter should cite the planning reference and carry an opt-out address. Firms that want a dialler list are not a fit for this product.
How many other PlanWatch letters will the same household get?
One planning application can be work for several trades, so we limit how many of our subscribers can post the same household in the same month. A shared-cover subscriber may see a few addresses held back until the next month, and the dashboard and batch email say how many. Exclusive cover is never held back by that limit: an exclusive subscriber always gets every address in their patch.
How does exclusivity work?
One subscriber per trade, per patch. The check runs before you pay: if another firm in your trade already holds those councils or postcode areas, we tell you at signup and take no money. Exclusivity is scoped to your trade only — a roofer and a window company can both hold the same town without clashing.
Can I cancel?
Yes. Billing is monthly and you can cancel at any time; cover runs to the end of the month you have paid for, then the patch is released for someone else. There is no minimum term and no contract to exit.
What happens when I sign up today?
You go straight to secure checkout, and your first list is generated within 24 hours of activation rather than a month later. That first list is not a snapshot of the last few weeks: it carries every live application in your patch whose buying window for your trade is still upcoming, open or closing, which in practice is most of the last six months plus some larger builds from further back that are only now reaching your stage. Finished jobs are dropped and each address appears once. Refused and withdrawn applications are dropped too for every building trade — with one deliberate exception: on the architects and planning consultants list they ARE the list, because a refusal is the moment a household discovers it needs drawings. After that a fresh list arrives every month covering new applications only, so it will be smaller than the first. If your patch turns out to be thinner than you expected in that first month, tell us and we will sort it out.
Other trades we cover
Window & door companies · Conservatory, orangery & garden room installers · Bricklayers & building contractors · Roofing contractors · Loft conversion companies · Kitchen companies · Landscapers & driveway contractors · Solar installers · Scaffolding firms · Demolition & strip-out contractors · Tree surgeons & arborists · Skip hire & waste removal · Electricians · Plumbers & bathroom fitters · Fencing & gates contractors · Plasterers & decorators · Flooring companies · Architects & planning consultants · Estate & letting agents
How to actually work these leads
A list is not a pipeline. What to send, when to send it, how many times to follow up and the compliance line we hold: how to turn planning applications into jobs →