Updated 13 November 2026.
For a UK business, the cost to build an ecommerce website depends on the size of the catalogue, the buying journey and how the store must connect to the rest of the operation. A simple first store and a complex platform with trade accounts or ERP integration are different projects. The quickest way to get a meaningful quote is to define what the first release needs to achieve.
What should you budget for an ecommerce build?
Our detailed UK ecommerce development cost guide gives indicative project ranges: around £5,000–£15,000 for a small store, £15,000–£50,000 for a mid-size build with more bespoke work, and £50,000 or more for a complex platform. These are planning ranges, not a quote. A migration, unusual fulfilment rules, custom integrations or a large product range can change the scope considerably.
WooCommerce projects have their own cost drivers. If that is your preferred platform, see our WooCommerce website cost guide for a more specific breakdown.
Start with the catalogue and customer journey
Count the products, variants and categories you need to launch with. Work out what customers must know before they buy, how they will filter or search, and whether the store serves consumers, trade buyers or both. A small catalogue with straightforward delivery can be planned differently from one with customer-specific pricing, subscriptions or complex stock rules.
Design effort should follow those requirements. A theme-based presentation can suit a simple store, while a brand with an unusual buying journey may need bespoke UX and templates. The right choice depends on what customers need to do, not on a visual preference alone.
Include the work behind the storefront
Payment, delivery, tax, returns, order handling and reporting all affect the build. So do connections to accounting software, CRM, ERP, stock management or fulfilment partners. For each integration, ask which system owns the data, how often it must update and what happens when a connection fails. These decisions can take more planning and testing than the visible pages.
If you already sell online, budget for migration as well as design and development. Product data, customer accounts, order history, analytics and important search URLs may need careful handling. Redirect planning and checks after launch help protect existing traffic; a new design alone is not a migration plan.
Allow for launch and ongoing costs
An estimate should explain what is included in discovery, content preparation, development, testing, training and launch support. Ask which third-party licences, hosting costs, payment fees and retained support sit outside the build price. A store also needs updates and improvements after launch as products, customer behaviour and internal processes change.
Price is only one comparison. A cheaper quote may exclude catalogue work, integrations or testing that you will still need to pay for later. Ask agencies to list assumptions and exclusions so you can compare the same scope.
How can VisionSharp help you scope it?
Bring us your current site, approximate product count, the main customer journeys and a list of systems the store must work with. We can help separate essential launch work from later improvements and recommend a suitable platform. Explore our ecommerce development services, or get in touch for a quote based on your actual requirements.
