This is the question everyone asks and nobody wants to give a straight answer to. Usually because the honest answer involves a lot of variables.

But vague non-answers are not helpful. So here is the most honest breakdown we can give you based on real projects.

Why Prices Vary So Much

Before the numbers it helps to understand why two agencies can quote the same project at completely different prices.

Technology choice matters. A Next.js and Node.js build costs more than a WordPress build because the skill set is narrower and the hourly rates are higher.

Team location matters. An agency in London charges different rates to one in Eastern Europe. Neither is automatically better or worse. They are different cost structures with different trade-offs.

Scope clarity matters enormously. A vague brief produces a vague quote. Agencies that have not done a proper discovery often under-quote because they have not thought through the full scope. That cheap number becomes much larger once the project is underway.

Real Price Ranges by Project Type

These are genuine ranges based on market rates in 2026 from a UK or Western European agency.

Simple informational website. Three to eight pages with no complex features. £2,000 to £6,000 on WordPress. £5,000 to £12,000 custom built.

Business website with custom features. Team pages, service pages, blog, booking system or client portal. £6,000 to £20,000 depending on complexity.

eCommerce store. WooCommerce with standard features. £8,000 to £25,000. Custom eCommerce starts at £20,000 and goes higher for complex requirements.

MVP web application. A first version of a SaaS product or web app with core features. £20,000 to £60,000. This varies a lot based on what the product does.

Full SaaS platform. A complete multi-user application with billing, user management, dashboards and integrations. £60,000 and upwards.

What Makes a Project Cost More

Understanding what drives cost up helps you make smarter decisions about scope.

Custom design from scratch costs significantly more than using a component library or template approach. If custom design is not critical to your product, invest the budget in functionality instead.

Third-party integrations add development time. Every connection to a payment provider, CRM or external API means more work.

Real-time features like live chat, notifications or collaborative tools require different architecture and significantly more development time.

Complex authentication systems, user roles and multi-tenant architecture all add meaningful cost.

What Can Reduce Your Cost

Define your scope precisely before you speak to agencies. A detailed specification produces accurate quotes and avoids costly scope creep mid-project.

Prioritise ruthlessly. Every feature you remove from version one reduces the cost. Build what you need to launch and add more once you have revenue.

Consider phased delivery. Build the core product first and fund later phases from early customer payments.

Use existing tools where they fit. If Stripe handles your billing perfectly there is no reason to build custom payment processing.

The Total Cost Is More Than the Build

Build cost is only part of the picture.

Hosting costs range from £20 a month for a simple WordPress site to several hundred pounds a month for a scaled application. Budget for 15 to 20 percent of your build cost annually for ongoing maintenance. And if you are building a SaaS product, plan for ongoing feature development costs from the start.

The Question Worth Actually Asking

The right question is not how much does it cost to build a web app. It is what is the most cost-effective way to build the right thing for my specific situation.

Getting that answer right is worth spending time on before you commit to any budget or approach.

CodingBrackets gives honest transparent project estimates based on your actual requirements. If you want a realistic number for your project, get in touch and let us talk it through.