What it costs to make a website mobile-friendly in the UK

Key takeaways

Mobile friendly website cost depends on one question: can the existing site be fixed, or does its foundation prevent it? Fixing is far cheaper and suits most sites built in the last five years. The figures below are indicative UK market ranges, not our prices. We do not publish a rate card, because the scope varies too much.

• £500 to £3,000: focused mobile fixes on a sound existing site.
• £3,000 to £12,000: redesign of structure and key templates.
• £5,000 to £20,000 or more: full rebuild on a new foundation.
• The platform, not the list of symptoms, decides which band applies.

How much does it cost to make a website mobile-friendly?

Making a website mobile-friendly in the UK typically costs an indicative £500 to £3,000 where the existing site is responsive and maintainable, £3,000 to £12,000 where structure and templates need redesigning, and £5,000 to £20,000 or more where the site must be rebuilt. Most small business sites fall into the first band.

The spread within each band reflects size and complexity. Five templates cost less to fix than twenty. A brochure site costs less than a shop. Global Bridge Labs (GBL) scopes each engagement individually, so use these ranges to judge whether a quote is in the right territory, not as a price list.

• Why mobile-friendly web design is essential for UK businesses
• how much a business website costs in the UK

What does each band buy?

Each band buys a different kind of work. The first changes how existing pages behave. The second changes how the site is organised and how key pages are laid out. The third replaces the platform or theme underneath.

• Fixes: text sizes, tap targets, spacing, tap-to-call, a sticky action bar, form fields and input types, image compression, pop-up and banner tidy-up.
• Redesign: new mobile-first layouts for the homepage and service templates, navigation, content reordering and rewriting for small screens.
• Rebuild: new theme or platform, content migration, redirects, new templates throughout, full testing and launch.
• All bands: testing on real iPhone and Android devices, and before and after measurements.

• Website redesign versus rebuild
• Quick website improvements to try before a redesign

What decides which band you are in?

The foundation decides. If the site has a responsive layout, a maintained theme or platform and someone who can edit its templates, the problems are almost always fixable in place. If any of those is missing, costs rise quickly, because the work is fighting the platform instead of improving the pages.

• Fixable: responsive already, on a current theme or builder, with editing access.
• Redesign likely: responsive but structured for desktop, with long pages and buried actions.
• Rebuild likely: fixed-width design, a separate mobile site, an unsupported platform or a theme too heavy to pass mobile speed tests.
• Unknown until audited: sites where nobody is sure who built them or how.

• The mobile readiness scorecard: score your site in an hour
• Separate mobile site vs responsive design: which is better?

What ongoing costs should you expect?

Mobile-friendliness is not a one-off purchase. New content, plugins, pop-ups and tracking scripts each have the potential to undo it. Website care plans in the UK typically run from £50 to £500 a month and should include checking the site on mobile after updates.

Budget a little time as well. A quarterly re-score on a real phone takes an hour and catches most regressions before they cost enquiries. That hour is the cheapest insurance in the whole budget.

• Website maintenance costs in the UK

How do you get quotes you can compare?

Give every supplier the same written list of problems and the same definition of done. A quote for 'mobile optimisation' can mean an hour of image compression or a month of redesign. A quote against a scorecard and a list of pages can be compared line by line.

• Share your mobile scorecard and the specific failures on each page.
• List the templates in scope: home, service, contact, blog, landing.
• State acceptance criteria: text size, tap targets, speed on mobile, devices tested.
• Ask what is excluded, and what would move the work to a higher band.
• Ask for before and after measurements as part of delivery.
• Ask who retains access and ownership of the changes.

• Mobile acceptance criteria to put in a website contract
• A website brief template agencies can quote from

Is it worth the money?

Work it out from your own numbers. An illustrative example: 1,800 mobile visits a month converting at 1%, where 2% is realistic, means 18 extra enquiries a month. If one in four becomes a £1,500 job, that is about £6,750 a month. Against that, a £2,000 fix pays back within weeks, even if only half the gain materialises.

It is not always worth it. If mobile traffic is small, if mobile already converts at more than half the desktop rate, or if the business cannot handle more enquiries, the money may do more elsewhere. The sum takes ten minutes and is worth doing before asking for any quote.

• What a website that fails on mobile really costs

What does this look like in practice?

A pattern we see when owners ask for quotes: one supplier proposes a £12,000 rebuild and another proposes £900 of fixes, for the same site. Both can be honest. The first has assumed the platform must go. The second has assumed it can stay. Neither was given a clear brief, so each guessed.

An hour's audit settles which is right. Where the site is responsive and maintainable, targeted fixes usually deliver most of the gain. Across our client work we have seen a 2.4x enquiry rate from conversion changes of that kind, without a rebuild.

• See client work
• Website Design & Development for UK businesses
• Make your website work properly on mobile

Cost checklist

• Score the site on a phone and list the failures.
• Confirm whether the site is responsive and on a supported platform.
• Estimate the monthly value of closing the mobile gap.
• Brief suppliers with the same list and the same acceptance criteria.
• Compare quotes line by line, including exclusions.
• Budget for a care plan and a quarterly re-score.

Next step

Find out which band you are in before you ask anyone for a price. It changes the conversation from 'how much is a new website?' to 'what is the least that needs doing?'.