Ask five agencies what a custom website costs and you’ll get five different numbers, anywhere from a few thousand pounds to tens of thousands. There’s no single average worth quoting. What matters is the range that fits the job your website actually needs to do.
A five-page brochure site for a local consultancy is a different job from a multi-location lead-generation platform, a membership portal or a web app with customer accounts. Design depth, content, integrations, migration risk and the support you need after launch all move the price.
This guide gives you planning bands for 2026, not fixed quotes. Use them to walk into a conversation with a web design or development agency already knowing roughly where you should land.
Custom website cost in the UK: practical planning bands
| Project type | Typical planning band | Usually includes |
|---|---|---|
| Lean brochure website | £3,000–£7,500 | A focused set of pages, responsive design, CMS setup, contact forms, basic technical SEO and launch support. |
| Growth-focused marketing website | £7,500–£15,000 | Deeper discovery, custom page system, conversion journeys, content migration, analytics, stronger SEO foundations and integrations. |
| Complex website or ecommerce build | £15,000–£30,000+ | Advanced content models, custom functionality, ecommerce, multiple integrations, complex migration, testing and stakeholder workflows. |
| Web product or customer portal | Scoped separately | Accounts, permissions, application logic, dashboards, data models and ongoing product development. |
A very low quote can be perfectly valid when the scope is genuinely small, a proven template does the job and you’re supplying finished content yourself. It gets risky when “custom” quietly means an off-the-shelf layout, discovery gets skipped, or the real work turns up later as change requests.
What changes the price of a custom website?
1. Strategy and discovery
Good projects start by getting clear on the commercial objective, the audience, the offer, the user journeys and how you’ll measure success. A site meant to generate qualified enquiries needs more thinking up front than a digital brochure does. Discovery costs money, but it’s typically cheaper than building the wrong thing and finding out months later.
2. The number and variety of page types
Twenty pages built from four reusable templates can be less work than eight pages that each need a bespoke layout. Ask how many distinct page types, components and content patterns are actually included, rather than counting URLs.
3. Bespoke design versus adapted templates
Bespoke design gives your brand and user journey more room to move, but it needs research, wireframes, visual exploration and responsive design work to back it up. A template-led approach can be the right commercial decision for a simple site, provided the agency is upfront about the limitations.
4. Content and migration
Copywriting, photography, illustration, video, data cleanup and shifting content out of an old CMS can move the budget more than people expect. Migration is rarely just copy and paste. Redirects, metadata, media, forms and old URLs all need careful handling, and skipping that step is a common way projects run over.
5. Functionality and integrations
Bookings, payments, CRM connections, gated resources, calculators, multilingual content, product catalogues and third-party APIs all add analysis, development and testing time. In our experience, the most expensive sentence in any brief is “it just needs to connect to our existing system.”
6. Performance, accessibility and SEO
A fast, accessible, search-friendly website doesn’t come from bolting on a plugin at the end. It depends on image handling, code quality, content structure, hosting, scripts, semantic markup and testing all the way through the build.
7. Project management and stakeholder complexity
More decision-makers, approval rounds and dependencies mean more coordination. A single clear owner on your side, agreed feedback windows and consolidated comments cut both delay and cost more reliably than any process document will.
What should a professional website quote include?
- A defined scope with included pages, templates, components and functionality.
- Discovery, information architecture and user-journey work.
- Responsive design and the number of design or revision rounds.
- CMS setup and a clear explanation of what your team can edit.
- Content responsibilities, migration limits and redirect handling.
- Technical SEO foundations, analytics and consent requirements.
- Browser, device, accessibility and functional testing.
- Hosting, licences, third-party fees and what renews annually.
- Launch support, training, warranties and ongoing maintenance options.
- Ownership of the website, design assets, code, accounts and data.
If two quotes are far apart, compare assumptions line by line. One may include discovery, copy support, migration and post-launch care while another covers only page assembly. The cheaper total isn’t necessarily the cheaper project.
How to set a realistic website budget
Start with the business case, not the website. What needs to improve after launch: lead quality, conversion rate, sales efficiency, recruitment, customer self-service, or trust in the brand? Then decide what the first release actually has to achieve, and what can wait.
- Prioritise the pages and journeys closest to revenue.
- Use reusable content components rather than commissioning a unique design for every page.
- Clean content before migration instead of moving years of low-value material.
- Keep integrations focused on systems the team will actually use.
- Budget for post-launch iteration rather than treating launch day as the finish line.
Common hidden costs to allow for
Your build quote might not include domain renewal, premium plugins, stock assets, photography, copywriting, transactional email, CRM subscriptions, payment fees, accessibility audits or ongoing support. Ask for a first-year cost summary and a recurring-cost summary too, so nothing surprises you when the renewal invoice lands.
Should a small business choose custom design?
Custom doesn’t have to mean complicated. It’s worth the investment when your website needs to communicate a distinctive offer, support real customer journeys, plug into your operations, or become a platform you can build on. A simpler route makes more sense when speed, validation and budget matter more than standing out.
The bottom line
For most UK SMEs we work with, a serious custom marketing website sits somewhere between £3,000 and £15,000, with complex commerce and platform work moving well beyond that. The number depends on the outcome you need, not the page count.
Next step: Trisec designs and develops websites around commercial goals, technical performance and long-term ownership. If you’re setting a budget, bring us the problem, the deadline and the must-have journeys, and we’ll help shape a realistic first release.
Frequently Asked Questions
How long does a custom website take to build?
A focused marketing site may take roughly six to twelve weeks. Complex content, integrations, stakeholder approvals or product features can extend the timeline. The quality and speed of your feedback is often the biggest factor.
Do website prices normally include hosting?
Sometimes. Ask whether hosting is included, what environment is used, who owns the account and which costs renew. A low first-year price can hide expensive or restrictive renewal terms.
Is WordPress cheaper than a custom website?
WordPress can reduce the cost of content management and common functionality, but a properly designed custom WordPress site still requires strategy, design, development and testing. The platform alone does not determine quality or price.
Can we launch in phases?
Yes. A phased plan is often the best way to protect budget. Launch the core journeys first, measure real behaviour and add lower-priority features when their value is clearer.