Custom plugins and themes

Custom WordPress development: plugins and themes built to order

We specialise in custom WordPress plugins, bespoke themes, and advanced extensions that do exactly what your business needs — no compromises.

Custom plugins built from scratch
Bespoke themes in React / PHP
Integrations with APIs and external systems
Compliant with WordPress Coding Standards
Liderwood: customer account with a PDF invoice download button

50+

Plugins and themes

3–8 tyg.

Timeline

50+

Plugins and themes

3–8 tyg.

Timeline

100%

Code you own

WP 6.x

Latest WordPress

Example projects

See all work

Why custom plugins instead of off-the-shelf?

Off-the-shelf plugins from the WordPress repository solve 80% of the problem — but that last 20% is what gives you a competitive edge. Ready-made solutions often mean bloated code that slows your site down, conflicts between plugins, missing features your business depends on, and reliance on a third-party developer. A custom plugin does exactly what you need — nothing more, nothing less. It's lighter, more secure, and fully under your control.

Jerzy Kukuczka Virtual Museum: Oral Histories archive with video interviews
CarsLab Import: current car listings on a custom WordPress theme

Custom themes — WordPress, done right

We build WordPress themes from the ground up, with no page builders or frameworks that slow your site down. We write them in PHP with the Gutenberg Block API. The result is a site that feels like a custom web app but is managed through the familiar WordPress dashboard. Full control over design, performance, and SEO.

Integrations and automation

WordPress isn't just a CMS — it's a platform you can connect to any system. We build plugins that integrate WordPress with CRMs (HubSpot, Salesforce), ERPs, payment gateways, booking systems, wholesalers, and external APIs. We automate processes: document generation, data syncing, notifications, and content approval workflows.

Security and performance

Every plugin and theme goes through a security audit: data sanitization, nonce verification, prepared database statements, and compliance with the OWASP Top 10. We optimise performance: minimal database queries, lazy loading, object caching, and compatibility with WordPress object cache. We deliver the code with documentation, tests, and readiness for WordPress updates.

Which businesses is this the best fit for?

See whether wordpress development is the answer to your business needs.

Businesses on WordPress

Got a WordPress site but the available plugins don't do what you need? We'll build a custom solution that fits your processes.

WooCommerce stores

Custom integrations with ERP, marketplaces and couriers: automation no off-the-shelf plugin can give you.

Publishers and portals

For the Jerzy Kukuczka Foundation we wrote an Oral Histories plugin with a video player and a transcript synced to the recording.

Agencies and software houses

Need a white-label plugin or theme for your clients? We build solutions you can brand as your own.

Technology and implementation detailsA section for the technically minded. Expand if you want the details.

WordPress Core

Hooks, filters, REST API: we make full use of what WordPress offers natively.

PHP 8+ / OOP

Clean, object-oriented PHP that follows WordPress Coding Standards.

React + Gutenberg

Custom editor blocks, Full Site Editing, and interactive React components.

WP REST API

Integrations and data exchange through the WordPress REST API.

ACF / Meta Box

Advanced custom fields and post types without the bloat.

WP-CLI + CI/CD

Automated deployment, database migrations, and environment management.

Our process

01

Requirements analysis

We define the scope of features, integrations, and expected outcomes.

02

Architecture

We design the plugin/theme structure, hooks, and custom post types.

03

Development

We code to WordPress Coding Standards and best practices.

04

Testing and QA

Unit tests, WP 6.x compatibility, and security checks.

05

Launch and documentation

Installation, training, and full technical documentation.

Calculate your project cost

Pricing calculator

Ballpark price based on scope

Solution type

Add-ons

Estimated project cost

£1,500 – £1,900

Get a quote

Ballpark estimate. Final quote after we analyse your requirements.

“Top WordPress specialists! They were hugely committed from day one — great communication and an incredibly fast turnaround. They helped us build a modern website.”

MG

Maja GT

Google review

What's included

Custom plugins built from scratch
Bespoke themes in React / PHP
Integrations with APIs and external systems
Compliant with WordPress Coding Standards
WordPress Multisite ready
Post-launch support and updates

Frequently asked questions

How much does a custom WordPress plugin cost?

A simple single-feature plugin starts at £1,500. An advanced plugin with API integrations starts at £4,000. Every quote is custom, prepared after we analyse your requirements.

Can I update the plugin myself later?

Yes — we provide full code documentation. You can develop the plugin yourself or have us continue the work under a care plan.

Is a custom theme compatible with Gutenberg?

Yes. We build themes fully compatible with the block editor (Gutenberg). We can also create custom blocks tailored to your design.

Do you build headless WordPress?

We also build WordPress in a headless architecture; these projects are quoted individually.

What does post-launch support look like?

We offer 30 days of free revisions after launch. After that, we can put the project on a care plan covering updates, monitoring, and ongoing development.

Related services

Need a custom WordPress solution?

Tell us your requirements — a free quote and architecture proposal within 48 hours.

Let's talk about your project
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