How much does a custom website cost in the UK?

Why custom website costs vary

Asking “how much does it cost to build a custom website in the UK?” is a bit like asking the price of a house: it depends on size, location, materials and finish. The good news is that with a clear scope and sensible decisions, you can predict and control spend. Below is a practical, UK‑focused guide to realistic budgets, what drives cost, and how to plan without surprises.

Typical UK price ranges

These are common ballpark ranges for professional agency builds. They’re not quotes, but should help with early budgeting.

• Simple brochure site (5–10 pages, strong design, editable content): £3,000–£10,000
• Bespoke marketing site with custom components, CMS, animations: £8,000–£30,000
• E‑commerce site (catalogue, payments, carts, promotions): £8,000–£60,000+
• Content‑heavy or multi‑region site (search, personalisation, headless CMS): £20,000–£75,000+
• Web app/SaaS (user accounts, dashboards, complex logic): £30,000–£250,000+

Expect London and specialist agencies to sit at the higher end, and complex integrations to push costs up.

What drives the price

Key cost drivers to consider at scoping stage:

• Scope and complexity: number of templates, content types, dashboards and workflows.
• Design depth: brand development, design systems, micro‑interactions and animation.
• CMS approach: themed WordPress vs custom theme, headless CMS, or fully bespoke CMS.
• E‑commerce features: product variations, subscriptions, multi‑currency, tax/VAT rules.
• Integrations: CRM, marketing automation, PIM, ERP, payments, fulfilment, identity providers.
• Content: copywriting, image sourcing, video, translations and governance.
• Performance and accessibility: optimisation, audits and remediation to meet WCAG.
• Security and compliance: authentication, roles/permissions, GDPR consent, logging.
• Hosting architecture: managed hosting, containers, serverless, CDN, edge caching.
• Testing: unit, integration, cross‑browser, device lab, penetration testing.

Line‑item breakdown (typical ranges)

Actual splits vary, but this is a useful way to think about where your budget goes:

• Discovery and workshops: £1,000–£5,000
  • Goals, success metrics, user journeys, requirements and technical approach.
• UX research and IA: £1,500–£7,000
  • Wireframes, navigation, content model, prototypes.
• UI design and design system: £2,000–£15,000
  • Visual design, component library, responsive states, motion guidelines.
• Content production and migration: £1,000–£10,000+
  • Copywriting, imagery, video, imports from legacy systems.
• Front‑end engineering: £2,000–£20,000+
  • Accessible, performant components, animations, responsive layouts.
• CMS setup/development: £2,000–£15,000+
  • Custom fields, roles, workflows, headless delivery where required.
• Back‑end features and integrations: £1,500–£25,000+ (per integration often £1,000–£10,000)
  • Payments, CRM, single sign‑on, catalogue sync, search.
• E‑commerce functionality: £3,000–£30,000+
  • Products, checkout, shipping, promotions, taxes, subscriptions.
• QA, accessibility and performance: £1,000–£6,000
  • Cross‑browser/device testing, WCAG fixes, Core Web Vitals improvements.
• SEO and analytics foundations: £1,000–£4,000
  • Technical SEO, redirects, structured data, consent, analytics events.
• Project management and devops: typically 10–20% of the build cost
  • Roadmapping, sprints, environments, CI/CD, releases.

Pricing models and UK day rates

Agencies typically use one of three models:

• Fixed‑price against a defined scope: suitable once requirements are clear and change control is agreed.
• Time & materials (T&M): flexible for evolving products; you pay for actual time at an agreed rate.
• Retainer/partnership: a monthly budget for continuous delivery, optimisation and support.

Common UK day‑rate ranges (ex‑VAT) you might see:

• Senior developer/architect: £600–£900/day
• Mid‑level developer: £450–£650/day
• UX/UI designer: £450–£700/day
• Product/Project manager: £500–£800/day
• QA/Tester: £350–£550/day
• Content strategist/copywriter: £300–£500/day

Blended rates (one rate for the whole team) are also common and often sit around £500–£750/day depending on seniority and location.

Timelines you can expect

• Simple brochure site: 4–6 weeks
• Marketing site with custom components: 6–12 weeks
• E‑commerce build: 8–16 weeks
• Complex platform or web app: 3–9 months

Timelines depend heavily on content readiness, integration lead times and stakeholder sign‑off cadence.

Ongoing costs after launch

Budget for operations, not just build:

• Hosting and CDN: £20–£300+ per month (traffic and architecture dependent)
• Domain and email: £10–£20 per year for domains; email varies by provider
• Maintenance and support retainer: £300–£2,000+ per month
• Licences: premium plugins, CMS tiers, search, monitoring (£10–£500+ per month)
• Security and monitoring: WAF, backups, uptime, penetration testing (ad‑hoc or retained)
• Continuous improvement: new features, A/B tests, performance tuning

Ways to control budget without cutting quality

• Prioritise an MVP: launch the must‑haves first; schedule nice‑to‑haves in phase two.
• Reuse and systematise: invest in a component library/design system to speed future work.
• Choose the right CMS: don’t over‑engineer; use headless only if you need omnichannel or custom workflows.
• Limit bespoke where standard works: pick established patterns for checkout, auth and dashboards.
• Get content ready early: approved copy and assets prevent late‑stage delays.
• Tighten decisions: appoint a single product owner and use clear acceptance criteria.
• Manage change: log assumptions and handle new requests via formal change control.

Comparing quotes: what to look for

• Clarity of scope: page types, content models, integrations and acceptance criteria.
• Assumptions and exclusions: hosting, licences, content, data migration, third‑party fees.
• Accessibility and performance: explicit targets (e.g. WCAG 2.1 AA, Core Web Vitals budgets).
• QA and release process: environments, test plans, rollback/backup strategy.
• Ownership and IP: access to repositories, documentation and deployment pipelines.
• Handover and training: CMS training, runbooks, support model and SLAs.
• Transparency of rates and estimates: who’s doing the work and at what seniority.

Red flags include vague one‑liners (“includes SEO”), no time for QA, or quotes that omit content and integrations but assume they’ll “slot in”.

When to invest more

• You’re competing in a crowded market where brand and performance materially impact revenue.
• Complex catalogue or pricing logic requires custom flows.
• You need robust security, auditability or regulatory compliance.
• Multilingual, multi‑region delivery with localisation and governance is in scope.

Briefing checklist (to get accurate pricing)

• Goals and KPIs
• Audience and key journeys
• Sitemap and page/feature list
• Content inventory and migration needs
• Design references and brand assets
• Integration list and API access
• Accessibility/performance expectations
• Timeline, budget range and constraints

A clear brief shortens discovery, reduces risk and yields a tighter, more reliable estimate.

If you’d like an honest, UK‑based view of cost for your specific project, along with options to phase delivery and control risk, contact Inovera and we’ll help you plan the right approach.