Shopify Theme Customisation
Update-safe changes to your existing theme — edits to sections, blocks and code, without a full rebuild.
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Working inside your existing theme.
An existing theme has decisions baked into its sections, blocks and code that aren’t always documented. We map how it fits together before making any change.
Each change is then made to fit the structure that’s already there and survive the next update Shopify or your app vendor pushes. We map the theme’s structure before changing a single file.
A list of niggles, fixed.
Most customisation requests aren’t one job, they’re a backlog: a section that doesn’t behave on mobile, a filter that’s never worked right, a checkout tweak nobody’s had time for.
The kind of work this covers:
- Rebuilding a section or block that doesn’t do what your team needs, without touching the code that already works fine.
- Fixing layout and behaviour issues that only show up on certain devices, browsers or screen sizes.
- Adding new functionality — a size guide, a custom filter, a bespoke bundle — into the theme’s existing sections and blocks.
- Cleaning up legacy code left behind by a previous developer or agency, so future changes are safer to make.
- Making changes update-safe, in files and overrides that a Shopify platform update or an app upgrade won’t silently wipe out.
Every change is made to fit the theme’s existing structure and survive the next platform or app update.
Shopify theme customisation, answered.
What does Shopify theme customisation cost?
It depends on the state of the existing code and how many changes are on your list. We review the theme first, then give you a fixed, itemised quote covering everything agreed up front.
Will changes survive a theme update?
That's the standard we build to. Changes are made in a way designed to survive updates from Shopify and from your installed apps, rather than sitting in files likely to be overwritten. Where a theme's structure makes that impossible, we'll tell you before we start.
How long does a customisation project take?
Measured in weeks, not months, and often considerably shorter for a focused list of fixes. You'll have a firm timeline once we've reviewed the theme and agreed the scope.
Can you work with a heavily customised theme?
Yes. We map the existing sections, blocks and code first, then make changes that fit what's already there and survive the next update. Where the structure makes a change risky, we set out the options plainly before starting.
Can you work with our current theme without breaking anything live?
Yes. Changes are built and tested away from your live store first, then released in a controlled way. We read the theme's existing structure before changing anything, precisely to avoid breaking something that currently works.