Website design for builders: extensions, lofts and renovations

Nobody books a builder in a panic. A homeowner planning a rear extension or a loft conversion will spend weeks looking at your past work, reading reviews and trying to work out whether you will turn up, finish on time and keep the site tidy. A builder’s website wins those jobs by showing finished projects in detail and explaining exactly how you work, so the fear goes before the first phone call. Unavoidable Marketing is a Leeds-based agency that designs and builds websites for UK builders, on WordPress you own, with founder Andrew Heppinstall on every strategy call.

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Last updated: 18 October 2026

What a homeowner is really worried about

Before they ring you, most people planning building work have heard at least one horror story. A friend whose extension ran three months over. A builder who took a deposit and disappeared. A kitchen knocked through with no idea what it would cost. Your website is your chance to answer those worries before they become objections:

• Will they do a good job? Show finished projects, close up and wide.
• Will it cost what they say? Explain how you quote and what affects the price.
• How long will my house be a building site? Give realistic timelines for typical jobs.
• Do I need planning permission or building regs? Explain who handles what.
• Are they a real, stable business? Show your address, team, years trading and memberships.

Most builders’ sites answer the first question with a photo gallery and ignore the rest. That is where the work is lost.

Portfolio pages that sell the next job

Your past projects are your strongest sales tool, but a grid of thumbnails labelled “Gallery” wastes them. We build a portfolio sorted by the type of work people search for:

A simple case-study structure that works

A full case study for your best jobs does more than any amount of sales talk. It does not need to be long. We use the same shape every time so customers can compare projects quickly:

• The brief: “Young family in a 1930s semi in Leeds needed a bigger kitchen and a downstairs toilet.”
• The plan: single-storey rear extension, steel beam to open up the back, bifold doors, underfloor heating.
• The paperwork: what was needed, such as permitted development, a party wall agreement or building control sign-off.
• The build: how many weeks on site, what happened in each stage, any surprises like old drains or poor footings.
• The result: finished photos and, ideally, a few words from the customer.

Five or six case studies like this, across your main job types, will usually do more for your enquiries than fifty extra photos.

A “how we work” page that lowers the fear

The single most useful page on a builder’s site is often the one that explains your process. It shows you are organised, and it lets people picture working with you. A clear version covers:

• The first visit: what you look at and what the customer should have ready
• The quote: how it is broken down, what is included and what counts as an extra
• Planning and building regulations: when an architect or structural engineer is needed, and who arranges them
• Typical timelines: rough guides for a single-storey extension, a dormer loft or a kitchen knock-through, with the caveat that every house differs
• Payments: how stage payments work, so nobody is asked for a large deposit up front without knowing why
• Living with the build: access, skips, toilets, dust sheets and how you keep neighbours on side
• Handover: snagging, certificates and any guarantee

Enquiry forms that qualify budget and timing

Builders lose hours visiting people who want a two-storey extension on a budget that would barely cover the steels, or who are not planning to start for two years. A good enquiry form filters gently without putting serious customers off. We usually ask:

• Type of project, from a short list
• Postcode
• Rough budget band, with “not sure yet” as an option
• When they hope to start: within three months, three to six months, later
• Whether they already have drawings or planning permission
• Photos or plans, if they have them

With that, you can see which enquiries to visit this week, which to phone first and which to send a polite note to. It also gives you a clear picture of where your best work comes from.

Testimonials and trust signals

Reviews from customers whose extension or loft you finished are worth far more than a generic five-star badge. Put them on the relevant project pages, with the town and the type of job. Link to your Google reviews so people can see them in full.

Show the memberships you actually hold. If you are a member of the Federation of Master Builders (FMB) or registered with TrustMark, show the logo near your enquiry form and explain in a line what it means. These are trust signals, not legal requirements, and we only display the ones you have. Your public liability insurance, company number and a real address all help as well.

Being found locally and by AI search

People search for “extension builders in Wakefield” or “loft conversion near me”. A page for each main area you work in, with real projects from that area, helps you appear in those searches. Your Google Business Profile should match your website exactly: same name, address, phone and services.

More homeowners now ask ChatGPT, Gemini or Google’s AI Overviews which builders to consider. These tools build answers from sources they can read and trust: clear answer-first pages, consistent business details, reviews and mentions on other reputable sites. Detailed case studies and an honest process page help here. Nobody can guarantee being named, and anyone who promises it is guessing.

How we do it

We have been building websites and running marketing since 2012, with 390+ projects behind us, and 92% of clients come back.