Around 4,000 HVAC companies trade in London, boiler repair searches run several times higher in January than in July, and heat pump installations are climbing fast on the back of the £7,500 Boiler Upgrade Scheme grant. Here is what the London market looks like from the search side, and how we get heating and cooling firms ranked in it.
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Actively trading HVAC companies registered in London, within a UK industry of more than 45,000 plumbing, heating and air conditioning businesses.
Of English households heat with gas, making boiler repair and replacement the core of London search demand.
UK heat pump sales in 2025, up 27% year on year, backed by the £7,500 Boiler Upgrade Scheme grant.
The boiler repair peak. Enquiry data shows demand highest in January and December, several times the summer level.
London sits inside the UK's plumbing, heating and air conditioning installation industry, which IBISWorld counts at more than 45,000 businesses in 2026. Company data puts roughly 4,100 actively trading HVAC firms registered in London alone, the densest concentration in the country. It is a fragmented market of small firms, which is exactly the kind of market where search visibility separates the busy from the quiet.
Demand is still boiler-led. Around 86% of English households use gas-fired heating, and roughly a quarter of homes are running a heating system more than 12 years old, which is a standing replacement pipeline for any firm that can get in front of the searches. "Boiler repair", "boiler installation", "new boiler cost", and "heating engineer near me" are the money keywords in every London borough.
The transition is real, though. UK heat pump sales reached over 125,000 units in 2025, up 27% on the year, with government policy targeting more than 450,000 installations a year by 2030 and the Boiler Upgrade Scheme putting £7,500 towards each eligible installation. Heat pump keywords are where boiler keywords were fifteen years ago: lower volume, far lower competition, and compounding fast.
London heating demand is the mirror image of a US cooling market. Boiler repair enquiries sit at their lowest through the summer, start climbing when heating systems come back on in autumn, and peak in December and January. Industry enquiry data puts January and December at the top of the year, and searches for "boiler repair near me" can run five to six times higher in January than in July. London itself accounts for a disproportionate share of national boiler repair enquiries.
The strategic consequence is the same one we give US contractors, with the calendar flipped: rankings must be in place before the peak. SEO movement takes 3 to 6 months, so a campaign started in spring or early summer enters October holding positions, right as the first cold snap sends every neglected boiler into fault codes. Starting in November means ramping up through the exact weeks the phone should have been ringing.
Summer is not dead time. It is when boiler replacement content earns its keep (homeowners replace on their own schedule when the heating is off), when heat pump and air conditioning pages build authority, and when the review pipeline gets ahead of the winter competition.
Map Packs in London resolve at borough and neighbourhood level. A firm in Croydon is not competing with one in Barnet, and a campaign has to be built around the areas you actually cover.
Flats, conversions, and landlords dominate. Demand skews to boiler swaps in tight spaces, landlord gas safety certificates, and rapid-response repair. Competition is heavy and proximity matters: firms based outside the centre struggle to crack central Map Packs without genuine coverage there.
Semi-detached and terraced housing stock with ageing systems. This is where the replacement pipeline is richest, and where borough-level location pages (Bromley, Enfield, Kingston, Romford) win packs that central-London firms cannot reach on proximity.
Heat pump searches are far less contested than boiler terms, and the buyers researching them read more before choosing an installer. Firms with MCS certification that publish real installation content are winning these enquiries with a fraction of the authority a boiler keyword demands.
Still a small share of homes, but every heatwave produces enquiry spikes, and the commercial and landlord segment is steady. For firms that install AC, a dedicated page competes in a much shallower pool than any heating keyword. Our air conditioning SEO page covers this side in detail.
The machinery is the same stack behind all our campaigns: local SEO and Google Business Profile optimisation to take Map Pack positions, technical fixes so Google can crawl and trust the site, borough-level location pages, a review system your engineers run from the van, and links from trade and local sources to hold positions once won. The full breakdown is on our HVAC SEO services page.
The London adjustments: the keyword map is built around UK vocabulary (boiler, heating engineer, Gas Safe, combi swap) rather than US HVAC terms, the content calendar is planned backwards from the winter peak, heat pump and Boiler Upgrade Scheme content is built ahead of the demand curve, and trust signals that matter to UK homeowners (Gas Safe registration, MCS certification, manufacturer accreditations) are made visible to both Google and the visitor.
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