Checkout extensibility
Checkout UI extensions for upsells, delivery instructions, gift options, and custom validation — on the supported extension model, not deprecated scripts.
Service
PlusShopify Plus Development
Checkout extensibility, B2B, scripts-to-Functions migration, and multi-store operations for merchants on Plus.
- Starting at
- From $9,500
- Timeline
- 6–12 weeks
Plus buys you access to checkout, B2B, and multi-store — none of which configure themselves. This engagement is for merchants already paying for Plus who are not yet using the parts that justify it.
What's included
B2B on Shopify
Company accounts, catalogs, price lists, payment terms, and quantity rules configured against how your buyers actually order.
Scripts to Functions
Migrating legacy Shopify Scripts to Functions, which is not optional work — Scripts are being retired and Functions behave differently under load.
Multi-store operations
Shared theme code across regional stores so a fix ships once rather than once per market.
How we work
- Step 1
Audit
What Plus features you pay for, and which are actually switched on.
- Step 2
Prioritise
Sequenced by revenue impact against build effort, agreed in writing.
- Step 3
Build
Delivered in sprints against a staging store.
- Step 4
Roll out
Staged per market or per store, with monitoring.
What you get
Checkout extensions deployed and documented
B2B configuration with an operations runbook
Functions source in your repository
Multi-store deployment process documentation
Discuss shopify plus development
Share your store URL, goals, and timeline, and you will get a written reply with an approach and a range.
Related services
Custom Shopify Store Development
End-to-end storefront builds — design, theme, apps, content, and launch — for brands that have outgrown a template.
Shopify Theme Development
Custom themes engineered for Core Web Vitals, accessibility, and merchandiser control — not just a visual refresh.
Shopify App Development
Custom public and private apps for workflows the app store does not cover — built on Shopify Functions, extensions, and the Admin API.
Prefer to browse products first?
Explore premium themes and apps while you define project scope.
Ready to start?
Share your store URL, timeline, and goals — we’ll reply with next steps.
Shopify Plus Development
From $9,500 · 6–12 weeks