Expert WordPress Customisation that fits.
Need to extend a theme, build a custom integration or rescue a legacy build? We provide expert-level customisation that respects your existing code while adding the features you need. No hacks, no patches, just clean development.
Clean code, native feel .
A good customisation should feel like part of the original site, not a bolt on. Our developers audit your current setup first so new features slot in cleanly and survive future WordPress and plugin updates.
Whether it is a new API connection, a custom Gutenberg block or a WooCommerce extension, we build it to be fast, secure, documented and easy to maintain.
- Theme and plugin feature extensions
- CRM and API integrations (Salesforce, HubSpot, Zapier)
- Legacy site rescue and modernisation
Concept to integration in four steps.
A careful approach to adding features to your existing WordPress site without introducing bloat or technical debt.
Technical audit
We review your current site architecture, plugins and theme to confirm the requested features can be integrated safely and efficiently.
Development
Features are built on a staging environment using clean, documented code that follows WordPress coding standards and your existing patterns.
QA and testing
We test for browser compatibility, plugin conflicts, performance regressions and accessibility before anything goes live.
Deployment
Once approved, we push changes to production with zero downtime and provide a walkthrough of how to manage the new functionality.
Professional feature delivery.
- Technical discovery and written scope
- Staging environment for safe testing
- Clean, documented PHP and JavaScript
- Security and performance review
- Plugin conflict resolution
- API documentation where applicable
- Training and walkthrough video
- 30 day post launch support
Why teams trust us with their existing site.
Not all customisation work is equal. Here is how we stack up against a typical freelancer and a traditional agency when extending a live WordPress site.
- WordPress engineers only
- Staging first, zero downtime
- Fixed quote before work
- Update safe, no theme hacks
- Plugin conflict resolution
- Typical turnaround1 to 6 weeks
- Starting price$1.5k
- Post launch support30 day included
“We love our brand and yes, we're total control freaks. Handing our website to someone on the other side of the world was terrifying. But WP Pro Devs absolute legend, exceeded our sky high standards. Calm, patient, and genuinely invested in the relationship as much as the code.”
Project based pricing .
Custom work needs custom estimates. Use these ranges as a guide for planning the scope of your project.
Small feature additions or theme tweaks that take a few days.
- Small feature tweaks
- Style and layout adjustments
- Plugin configuration
- Basic documentation
New feature work or a single major API integration.
- New feature development
- Custom Gutenberg blocks
- Standard API integration
- Full written documentation
Site modernisation or multiple complex integrations at once.
- Complex integrations
- Legacy code rescue
- Performance optimisation
- Priority developer access
Ongoing development support for growing platforms and teams.
- Full platform overhaul
- Custom plugin architecture
- Dedicated project lead
- SLA with priority response
Every feature ships production ready .
We do not consider work done until it passes our internal quality checklist. No shortcuts, no excuses.
Lighthouse 95+ preserved
New features never drop your existing performance score. Measured before and after on staging.
Core Web Vitals pass
LCP under 2.5s, CLS under 0.1, INP under 200ms. Verified on real device emulation.
WCAG 2.2 AA compliant
Keyboard navigation, semantic HTML, ARIA labels and contrast checked against the latest standard.
Update safe code
Child themes, custom plugins and hooks. Your changes survive WordPress, theme and plugin updates.
Security reviewed
Nonces, capability checks, sanitisation and escaping on every input and output we touch.
Cross browser tested
Verified on Chrome, Safari, Firefox, Edge and real mobile devices before your staging review.
Clean, documented code
PSR standards, WordPress coding conventions, inline docs and a handover README your team can read.
Plugin conflicts resolved
We diagnose on a staging copy, isolate the root cause and fix cleanly. No silent workarounds.
Backed by real QA
Functional QA, visual QA and regression QA on the full site before anything touches production.
Your clients. Our code. Your brand.
We are the silent development team behind dozens of design and marketing agencies. Your client sees your work, your invoice and your brand. Our name never appears on the feature, the commit or the handover.
- 01
Fully branded delivery
Staging links, documentation and handover materials carry your brand, not ours.
- 02
Dedicated partner PM
One point of contact for all your customisation work. Shared Slack channel, weekly syncs, fast replies.
- 03
Transparent partner pricing
Retainer rates, bulk discounts and priority scheduling for agency partners.
- 04
Your process, not ours
We plug into your Figma, ClickUp, Notion or Linear. No tool switching, no friction for your team.
How white label delivery works
Brief the feature
You share your client's customisation request in your stack. Figma, ClickUp, Notion, wherever you already work.
Scope and partner quote
We write a detailed spec and send you a partner rate quote. Never shown to your client.
Add margin, quote your client
You mark up, brand the proposal and present it on your letterhead at your price.
Client approves the scope
Your client signs off on your terms, with your brand, and pays you directly.
We build under NDA
Silent build on branded staging. No logos, no footer credits, no email signatures from us.
Deliver as your own
You review, accept handover and deliver the shipped feature to your client under your agency name.
What people ask us about customisation.
Tell us what you need changed.
Share what is broken or missing and a WordPress engineer will come back with a written estimate and timeline within one business day.
- Free scoping call and written estimate within 24h
- Fixed quote before any work begins
- No hacks, clean code your team can maintain