Shopify Agency UKhigh-converting Shopify stores for British brands
Independent UK Shopify agency designing custom themes, migrations, and conversion-optimised stores for British ecommerce brands. Fixed pricing, no monthly retainers required.
Projects from £2,800 · Fixed pricing · UK based
WebKatie is a UK Shopify agency working with independent retailers, DTC brands, fashion labels, beauty and wellness companies, food and drink producers, and homeware sellers across the country. We design and build custom Shopify stores that look as good as your product photography and convert as hard as your best-performing Meta ad. Every project is led by a senior designer — there's no junior account-management layer between you and the work.
Most UK ecommerce brands come to us for one of three reasons: their current theme is generic and the brand is being let down by it, their Shopify store is slow and bleeding mobile conversions, or they're migrating from WooCommerce, Squarespace, Wix or Magento and need it done properly. We handle the strategy, the design, the build, the data migration, the SEO redirects, and the launch — fixed-priced before we start.
We work nationwide and remote-first as standard. Discovery via Zoom, designs in Figma, builds on staging, and a shared Notion hub so you always know what's happening. Based in Windsor, Berkshire, we can also meet in person if you're in London or the South East. Wherever you ship from, we deliver the same fixed pricing, the same standards, and the same hands-on support.
Everything you need to launch
How it works
Strategy Call
Free 30-min ecommerce audit by Zoom — products, AOV, traffic, conversion gaps.
Design
Brand-led custom designs for home, PDP, collection, cart and checkout.
Build & Migrate
Custom Shopify theme, product import, payment setup, SEO redirects.
Launch & Optimise
Soft launch, Core Web Vitals pass, training, and 30 days of CRO support.
Recent projects
"We migrated from WooCommerce to Shopify with Katie and saw a 38% lift in mobile conversion within a month. The new theme looks exactly like our brand should have looked years ago."
Hannah
DTC Skincare Brand, Bristol
"Other Shopify agencies wanted a £3k/month retainer just to talk. Katie quoted fixed, delivered in 5 weeks, and we own everything."
James
Independent Menswear, Leeds
Frequently asked questions
Are you a Shopify Partner?+
Yes — we're a registered Shopify Partner agency in the UK and work across Shopify, Shopify Plus, and Online Store 2.0 themes.
How much does a Shopify agency in the UK cost?+
Most UK independent Shopify agencies charge £8k–£40k. We build fixed-priced from £2,800 for a clean launch store, £4,500–£8,000 for most growing brands, and £8,000–£20,000 for Shopify Plus and complex migrations.
Do you migrate stores from WooCommerce, Squarespace, Wix, or Magento?+
Yes — migrations are roughly 40% of what we do. We handle product and customer data, 301 redirects to preserve SEO, payment and tax setup, and a parallel launch so you don't lose a sale.
How long does a Shopify build take?+
A clean launch store takes 3–5 weeks. A custom-themed migration is usually 5–8 weeks. Shopify Plus and headless builds are quoted individually.
Do you handle CRO, email and ongoing growth?+
We handle on-site CRO (PDP UX, cart flow, upsell, AB tests) and Klaviyo email setup. For ongoing ads management we partner with specialist UK paid-media teams we trust.
Do you work with British brands shipping internationally?+
Yes — we configure multi-currency, multi-region pricing, international SEO (hreflang), and integrate with Shopify Markets for cross-border selling.
Will the store be fast on mobile?+
Yes — every store we ship hits a Lighthouse mobile score of 80+, passes Core Web Vitals, and uses lazy-loaded images, app auditing, and minimal third-party scripts.
Do you offer ongoing Shopify support?+
Yes — care plans start at £150/month and cover updates, edits, app monitoring, theme updates, and same-week response times.
Looking for this service locally?
The studio is based in Windsor and works across Berkshire, Surrey, Buckinghamshire and London — plus remotely across the UK.
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Read moreLooking for a Shopify agency in the UK? Let's build.
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