Custom WordPress Development
Custom themes, plugins, WooCommerce and API integrations — built from scratch by a senior UK WordPress freelancer. No pre-made templates, no bloated code, no corners cut. White-label ready for agencies.
Custom WordPress Development Services
Custom Theme Development
Pixel-perfect WordPress themes built from approved design files — Figma, XD, PSD, or Sketch. Clean markup, proper template hierarchy, and an editor experience your client can maintain.
Custom Theme DevelopmentCustom Plugin Development
Bespoke WordPress plugins for functionality that no ready-made solution covers. CRM integrations, custom post type workflows, REST API bridges, and more — built to WordPress coding standards.
Custom Plugin DevelopmentWooCommerce Customisation
WooCommerce built around your actual business logic — custom product types, checkout modifications, pricing rules, gateway integrations, and bespoke order workflows.
View ServicesFigma to WordPress
Design-to-code conversion from any design tool. I translate approved layouts into semantic HTML, CSS, and PHP — responsive, accessible, and performance-optimised from day one.
Figma-to-Code ServicePage Builder Integration
Gutenberg, Elementor, and Bricks Builder integration for client-editable layouts — without the performance penalty. Custom blocks, templates, and editor configurations that match your design system.
Page Builder IntegrationWhy Custom WordPress Development?
Built for your exact requirements
Custom development starts from your design and content model, not a generic template stretched to fit. Every template, component, and database query does exactly what your project needs.
Leaner, faster code
Pre-made themes ship with hundreds of features you will never use. A custom WordPress site loads only the code it actually needs — measurably faster Core Web Vitals, lower hosting overhead.
Easier to maintain long-term
A site built around your specific requirements is far easier to extend than a theme that has been hacked into shape over time. Future developers know exactly what the code is supposed to do.
Smaller security surface
Popular themes are widely targeted because their code is public. A custom-built WordPress site has a smaller, harder-to-predict attack surface — especially when security is considered during the build.
How a Custom WordPress Project Works
- 1
Discovery & scoping
I review your design files, technical requirements, and content model before writing a line of code. This avoids rework and ensures accurate estimates.
- 2
Architecture & build
I define the template structure, custom post types, and any plugin or integration architecture, then build to WordPress coding standards with performance and security in mind from the start.
- 3
Staging & QA
All custom development is built and tested on staging first. Cross-browser, cross-device, and performance testing before any client review.
- 4
Client-ready handoff
Clean code, inline documentation, and a handoff your team — or your client — can actually maintain. No black boxes.
Working with UK Digital Agencies
Most of my custom WordPress development work is delivered white-label for UK digital agencies. If your agency has overflow builds, specialist custom work, or needs a reliable developer to embed in project delivery — I operate under NDA, communicate in your workflow, and hand off code that reflects well on your studio.
Read more about how I work with agencies: Outsource WordPress Development or White-Label WordPress Development.
Frequently Asked Questions
- What is custom WordPress development?
- Custom WordPress development means building a WordPress site or feature from scratch — without relying on pre-made themes or off-the-shelf plugins. It includes custom theme development from a design file, bespoke plugin creation, WooCommerce customisation, and complex integrations tailored to specific business requirements.
- Why choose custom WordPress development over a theme?
- Pre-made themes carry code for features you will never use, constrain your design to someone else's layout assumptions, and often create long-term maintenance problems. Custom development starts from your actual requirements, delivering a leaner, faster, more secure site that is genuinely yours to maintain.
- How much does custom WordPress development cost?
- In the UK, expect £40–£120/hour for a specialist. Full custom theme builds range from £1,500 for simple sites to £8,000+ for complex, content-heavy projects. Plugin development varies widely — a small custom plugin may take 8–15 hours, while enterprise integrations can take significantly longer. I charge £40/hour with fixed-project quotes available.
- How long does custom WordPress development take?
- A typical custom theme build takes 2–4 weeks. A simple custom plugin takes 1–2 weeks. Complex projects involving API integrations, WooCommerce customisation, or multisite setups run 4–8 weeks or more. Realistic timelines depend on the approved design quality, content readiness, and decision speed on the client side.
- Do you build custom WordPress themes from Figma or PSD files?
- Yes. I convert approved design files (Figma, XD, PSD, Sketch) into pixel-perfect, production-ready WordPress themes. The output is clean, commented code with proper template hierarchy, ACF integration where needed, and a Gutenberg-compatible editor experience for your client.
- Can you customise WooCommerce for specific business needs?
- Yes. WooCommerce customisation is one of the most common custom WordPress development requests I handle — custom product types, checkout field modifications, bespoke pricing rules, payment gateway integration, and custom order management workflows.
- Do you work with UK digital agencies on custom WordPress projects?
- Exclusively. I work white-label with UK agencies as an overflow developer or long-term delivery partner. Your clients never know I exist. I operate under NDA, work UK business hours, and hand off agency-ready code you can maintain.
- What is the difference between custom theme development and custom plugin development?
- A custom theme controls the visual presentation and template structure of your site. A custom plugin adds or extends functionality — independently of the theme. Most serious custom WordPress projects require elements of both: a theme built from your design, and one or more plugins handling the business logic your client needs.
Ready to Start a Custom WordPress Project?
I'm Filippo Tinnirello — a specialist WordPress developer working exclusively with agencies and businesses. 20+ years of experience, £40/hr, white-label and NDA-ready.