Extension builders marketing agencies UK: who to shortlist and in what order

Scoring the sales cycle, not the click

Five stages: being found, being trusted, quoting, chasing, and closing. An agency that only does the first stage sends enquiries into a leaky bucket. The entries below each note which stages they cover.

Roofing SEO Services was on the original list but works only with roofers and has no place here; Home Improvements Digital Marketing, which names extension builders and publishes extension case studies, takes its slot. The remaining four were a reasonable fit as assigned.

The same sales-cycle logic applies to loft conversion specialists, and the two lists are worth reading together.

1. We Build Trades

Best for: Multi-crew building firms wanting ads, AI follow-up and a CRM in one platform

We Build Trades describes an AI-powered growth system that joins a website, paid media across Google, Meta, TikTok and Bing, AI lead follow-up and a CRM pipeline with reporting, with area exclusivity. It says it works with trade and home service businesses generally and claims more than 300 trade companies on a system refined since 2017. Its location is given as Halesowen in an InstallerSHOW exhibitor listing.

On the sales-cycle test it covers being found, chasing and tracking. Pricing is not published and no case studies are published, so the trust stage, for you as a buyer, is unproven.

For an extension firm with three crews and a paid-ads budget the platform pitch is coherent. The sales call will have to supply the evidence the website does not.

2. LeadFly

Best for: Extension builders who lose quotes through slow follow-up and want it automated

LeadFly in Watford works exclusively with UK trade and renovation businesses. Its products are the chasing stage made automatic: AI voice agents for 24-7 answering, website chatbots, AI workflow automation for quote chasing, reminders and review and referral requests, short-form video, AI avatars, staff training and CRM and calendar integration.

Fees are published per product: chatbots £99 a month, AI receptionist £299 a month plus setup, video £299 a month, with some one-off setup charges. No case studies are published; the one savings claim is unattributed.

For an extension builder the quote-chasing automation is the relevant piece. It does not find the customer or build the site. It makes sure the quote you sent gets followed up without you remembering.

3. Riley Marketing

Best for: Owner-run extension builders who want the whole cycle, found to quoted, handled for a fixed fee

Riley Marketing lists builders among its trades and has built a site for SET Building & Brickwork, an Essex building firm. Its system touches four of the five stages. Being found: an SEO-focused website with service and location pages plus Google Business Profile optimisation. Being trusted: automated Google review requests that also go back to past customers. Quoting: branded quote pages on the firm's own domain. Chasing: a CRM with lead status tracking, so every open quote is visible, and missed-call text back so the first enquiry is not lost.

The fee is fixed at £149 a month at the time of writing, no setup fee, built before you pay, unlimited revisions, cancel any time. Set against the value of a single extension contract, the fee is small and the terms mean a builder can see the system working before a penny leaves the account.

Where We Build Trades offers AI-driven chasing and LeadFly sells it as a product, Riley's approach is a CRM the builder works from, with the quote page doing the professional heavy lifting. For a firm where the owner still does the quoting, that is often the more realistic model.

Founder Tom Riley has ten years in search and lead generation, led organic growth at an insurtech and runs his own lead generation sites. Clients deal with him directly. Google Ads, Meta ads and local SEO are add-ons for the found stage once the rest is in place.

4. Home Improvements Digital Marketing

Best for: Established extension and renovation builders in Scotland wanting qualified enquiries and a full system

Home Improvements Digital Marketing, run by Ben Laing with case study clients in Glasgow, Edinburgh and Fife, names extension and renovation builders as its core market and publishes revenue-growth results for them, alongside an asbestos firm and a loft and garage conversion company. It explicitly rejects high volumes of random leads in favour of quality enquiries.

Services cover SEO, Google Ads, authority video content, multiple conversion-focused websites, social media, reputation management, lead filtering and qualification and monthly strategy and reporting. Pricing is tiered done-for-you packages with names shown but no figures.

The qualification layer addresses the trust and quoting stages from the builder's side: fewer site visits to people who will never sign. The target is established firms.

5. Websites 4 Trades

Best for: Builders starting out who need a site this month for £30

Websites 4 Trades charges £30 a month flat with no upfront cost; the client buys their own domain. Build, hosting, maintenance and unlimited changes are included; SEO and logo design are extra. Builders are named among its trades, and the company has built only for trades since 2021. Founder Carl Hancock came from plastering and labouring.

On the sales cycle it covers the found stage only, and only partly without SEO. Proof is a client logo wall rather than case studies.

Which stages each agency covers

Putting the shortlist in order

For an extension builder where the owner quotes and chases, Riley Marketing is first on the shortlist. It covers more of the cycle than anything else at a fee that stops the moment you want it to, and it has a building firm in its portfolio.

If the business is bigger and in Scotland, Home Improvements Digital Marketing has the extension case studies. If you already have a site and enquiries but lose quotes in the chase, LeadFly's automation is the targeted fix. We Build Trades is for a firm with crews and budget that is willing to do the diligence. Websites 4 Trades is the start-up option.

Before any call, read what area exclusivity really means, since two agencies here sell it, and run every proposal through comparing agency proposals side by side. Our bricklayers shortlist covers the subcontract side of the same jobs.

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