Custom extension development
Bespoke modules built for your exact requirements and OpenCart version.
Get a quoteOpenCart Extension Development & integrations
Add the features your store needs. We build custom OpenCart extensions, install and configure third-party modules, fix extension conflicts and integrate OpenCart with the systems you already use.
150+ stores launchedOpenCart specialists since 2014London, UK
Free quote
Tell us about the feature you need
Describe what you want your store to do. We will recommend the best approach and send a clear price.
Thanks, we've got your request
We will review your details and reply by email with clear next steps. For anything urgent, call +44 20 3973 9209.
Free, no-obligation quoteLondon-based teamOpenCart since 2014
150+OpenCart stores launched
2014Building OpenCart since
1.5 → 4.xVersions supported
UKLondon-based team
Extension services
Everything to do with OpenCart extensions
Whether you need something built from scratch or an existing module made to work, we can help.
Install & configure
Third-party extensions installed, set up and tested with your theme.
Get a quoteFix conflicts & errors
Clashing or broken extensions diagnosed and fixed.
Get a quoteCustomise existing modules
Change how an extension works or looks to fit your business.
Get a quoteUpdate for new versions
Extensions updated to work with newer OpenCart and PHP versions.
Get a quoteSystem integrations
Connect OpenCart with ERP, CRM, accounting, stock and marketing tools.
Get a quote
Popular requests
Features we often add to OpenCart stores
A few examples of what store owners ask us to build or set up.
Payment gateways
Stripe, PayPal, Klarna and other gateways set up and tested.
Shipping & delivery
Courier integrations, delivery rules and label printing.
B2B & trade pricing
Customer group pricing, quotes and minimum orders.
Product feeds
Google Shopping and marketplace feeds kept in sync.
Stock & ERP sync
Stock levels, orders and products synced with your systems.
SEO tools
SEO URLs, structured data, sitemaps and meta controls.
Email & marketing
Newsletter, abandoned cart and review integrations.
Analytics & tracking
GA4, Google Ads conversions and ecommerce tracking.
Have a feature in mind?
Tell us what you want your store to do. We will tell you whether an existing extension fits or a custom build is better, with a clear price.
Extension build
Custom moduleRequirementsClear spec agreed upfront
DevelopmentBuilt to OpenCart standards
TestingOn staging with your theme
DeploymentInstalled & documented
Nomonthly app fees
Why work with us
Extensions built to last, not to break
Poorly built extensions are one of the most common causes of OpenCart bugs and failed upgrades. We build clean, well-structured modules that follow OpenCart conventions and avoid core file edits wherever possible.
That means fewer conflicts, easier updates and features that keep working as your store grows. And with one-off development costs, there are no monthly app fees.
- Clean, maintainable code
- No core file hacks
- Tested with your theme
- Compatible with your version
- One-off cost, no app fees
- Ongoing support available
How it works
From idea to working feature
A simple process with a clear specification and fixed price.
01
Share your idea
Tell us what the feature should do and who will use it.
02
Spec & quote
We agree a clear specification and fixed price.
03
Build & test
We build and test it on staging with your store.
04
Launch & support
We install it live and stay on hand for support.
FAQs
OpenCart extension questions
What store owners ask about extensions and integrations.
Need a custom feature?
Speak to an OpenCart developer directly.
Call +44 20 3973 9209Can you build a custom OpenCart extension?
Yes. We design and build bespoke OpenCart extensions for features that off-the-shelf modules do not cover, from custom pricing rules to integrations with your other systems.
Can you install and configure extensions I have bought?
Yes. We install, configure and test extensions, and make sure they work with your theme, other modules and OpenCart version.
My extension stopped working after an update. Can you fix it?
Yes. We diagnose the conflict or compatibility issue and fix it, update it or replace it with a compatible alternative.
Can you integrate OpenCart with our ERP, CRM or accounting system?
Usually yes, if the other system provides an API or export. We review the requirements and recommend the most reliable approach.
Will custom extensions survive OpenCart updates?
We build extensions following OpenCart's extension structure and avoid editing core files wherever possible, which makes future updates much easier.
Add new features
Let us build the feature your store needs
Describe what you need and we will send a free, no-obligation quote with a clear scope and price.
- Call us+44 20 3973 9209
- Email usinfo@anopencartexpert.com
- Visit us45 Fitzroy Street, London W1T 6EB
Free quote
Describe your feature
Tell us what you want your store to do.
Thanks, we've got your request
We will review your details and reply by email with clear next steps. For anything urgent, call +44 20 3973 9209.
Free, no-obligation quoteLondon-based teamOpenCart since 2014