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WordPress Plugins
& Extensions.

ONE Degree Studio builds custom WordPress plugins for businesses in Australia and worldwide. We add functionality, connect third-party services, and automate workflows — fully documented and tested.

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Why work with us

Clean Architecture

We follow WordPress coding standards and best practices. Every plugin is object-oriented, namespaced, and designed for maintainability and future updates.

Security First

Input validation, output escaping, nonce verification, and capability checks on every action. We build plugins that pass WordPress.org security reviews.

Performance Optimized

Efficient database queries, caching strategies, and lazy loading ensure your plugin doesn't slow down your site. We benchmark every feature.

API Integrations

Connect WordPress to CRMs, payment processors, marketing platforms, webhooks, and third-party APIs. Automate workflows and sync data in real-time.

[Pricing]

Fixed prices.
No surprises.

Option 1 of 3

Simple Plugin

$3,500+AUD

Basic custom functionality or simple API integration.

What's Included
  • Custom post type/taxonomy
  • Basic admin settings page
  • Simple data processing
  • WordPress coding standards
  • Basic documentation
  • 1-month bug fix support
Fixed PriceWritten Quote
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Option 2 of 3

Business Plugin

$8,000+AUD

Custom functionality with integrations and admin interface.

What's Included
  • API integrations (1-2 services)
  • Advanced admin dashboard
  • Custom database tables
  • User role management
  • Complete documentation
  • 3-month priority support
Fixed PriceWritten Quote
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Option 3 of 3

Enterprise Plugin

$15,000+AUD

Complex plugin with multiple integrations and features.

What's Included
  • Multiple API integrations
  • Custom REST API endpoints
  • CRON jobs & background processing
  • Multisite compatibility
  • Full test coverage
  • 6-month managed support
Fixed PriceWritten Quote
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Prices in AUD. Every quote is fixed and written before work starts. See all pricing

12+ Years Experience100+ Projects DeliveredAustralia · USA · CanadaFixed Price, Every TimeStudio: Open
[Our Process]

How we
get it done.

  • 01
    Phase 01

    Requirements Analysis

    We document every feature, data flow, user role, and integration point. We identify edge cases and define acceptance criteria before writing code.

  • 02
    Phase 02

    Plugin Architecture

    We design the plugin structure using WordPress hooks, filters, and MVC patterns. We plan database schema, REST API endpoints, and admin interfaces.

  • 03
    Phase 03

    Development & Testing

    We build the plugin using PHP 8+, WordPress coding standards, and automated testing. We test on multiple PHP versions, WordPress versions, and hosting environments.

  • 04
    Phase 04

    Deploy & Document

    We deploy to your production site, provide full code documentation, and train your team on plugin settings and maintenance workflows.

[Work]

Built.
Shipped. Measured.

Shopify builds for brands in Australia and overseas. Each one scoped, designed and built in-house, at a price fixed before work started.

All work →
[Stack & Scope]

What we
build with.

Custom plugin development for WordPress and WooCommerce sites.

specialisms
Capabilities
v2026.1

01 —

Core Plugin Types

01Custom post types & taxonomies
02Advanced custom fields (ACF extensions)
03Custom admin panels & dashboards
04WooCommerce extensions & customizations
05Membership & user management plugins
06Booking & appointment systems
07Form builders & data collection
08Import/export & data migration tools

02 —

Advanced Features

01REST API & webhook integrations
02Third-party API connections (Stripe, Mailchimp, etc.)
03CRON jobs & background processing
04Multi-site compatibility
05Role-based access control
06Custom Gutenberg blocks
07WP-CLI commands
08Performance monitoring & logging
Tech Stack
06 tools
WordPress Core
PHP 8+
WooCommerce API
REST API
WP-CLI
Git Version Control
[Use Cases]

What Custom Plugins
Are Built For.

Off-the-shelf plugins don't always do exactly what you need. We build the difference.

Custom Booking Systems

Booking forms with availability management, reminders, and payment.

Membership & Gating

Lock content behind memberships or subscriptions with custom logic.

API Integrations

Connect WordPress to external CRMs, ERPs, or data sources.

Custom Post Types

Add new content types (jobs, properties, menus) beyond pages and posts.

[Also Consider]

Related
Services.

WordPress Development

Full custom WordPress sites with any functionality you need.

Custom Web Apps

If WordPress isn't the right platform, we build from scratch.

WordPress Security

Harden your site after adding custom plugin functionality.

[Clients]

In their
words.

“ONE° Studio is a skilled full-stack web development and design agency with strong technical knowledge. On multiple client projects including web development and optimisation, they delivered reliable and effective solutions. They communicate clearly, stay connected with stakeholders, and are easy to work with. Professional, dependable, and collaborative a genuine asset to any project.”
Léon van Vugt from Studio ITO

Léon van Vugt

Director — Studio ITO, Netherlands

[FAQ]

Frequently
Asked.

Custom WordPress plugin development starts from $1,500 AUD for a simple single-purpose plugin. More complex plugins with external API integrations and admin UIs range from $3,000–$15,000+.
Yes. We can extend or modify third-party plugins, though we typically recommend building a companion plugin rather than editing the plugin directly (to avoid update conflicts).
Yes. We build plugins that meet WordPress.org submission guidelines including security reviews, coding standards, and documentation requirements. We handle the entire submission process and ongoing updates for public plugins.
Yes, if required. We build multisite-compatible plugins with network-wide activation, per-site settings, and proper database handling. We test on WordPress multisite environments before delivery.
Not if built correctly. We optimise database queries, use caching, implement lazy loading, and avoid loading scripts on every page. We benchmark performance before and after plugin installation.
We offer monthly maintenance retainers starting at $500/month for ongoing plugin updates, security patches, and compatibility testing. We monitor WordPress and PHP releases and proactively update plugins.
Book a free technical discovery call. We'll discuss your requirements, review your WordPress setup, and provide a detailed proposal with fixed pricing and timeline. No commitment required. Book at onedegree.studio/book or email us directly.
We build plugins to WordPress coding standards, which means they're less likely to break than off-the-shelf plugins. We also offer maintenance retainers to test and update plugins after major WordPress releases.
Simple plugins take 2–3 weeks. Medium complexity plugins (API integrations, custom admin) take 4–6 weeks. Complex plugins with multiple integrations and advanced features can take 8–12 weeks. We provide a detailed timeline after scoping.
Yes. We extend and customize popular plugins like WooCommerce, Gravity Forms, ACF, and BuddyPress. We follow best practices using hooks and filters to ensure updates don't break customizations.
Yes. We integrate WordPress with CRMs (HubSpot, Salesforce), payment processors (Stripe, PayPal), email marketing (Mailchimp, ActiveCampaign), and any REST or SOAP API. We handle authentication, webhooks, and data syncing.
Yes. We provide complete code documentation (PHPDoc standards), user guides for plugin settings, and developer documentation for customization. All plugins include inline comments and README files.
Yes. You own all code we write. We deliver full source code, documentation, and version control history. No licensing restrictions, no ongoing fees (except for optional maintenance retainers).
[Next Steps]

One call.
One fixed price.

Book a free 15-minute call. We scope your project, give you a fixed price, and tell you exactly what you'll get — no surprises.

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