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An Architect’s Dream: Customisable Architectural Designs at Your Fingertips.
Why Wait?

30 House Types - each comes with a wide variety of already designed:

Back Extensions
Side Extensions
Wrap Around Extensions
Loft Extensions
Porch Extensions

Various styles of extensions to suit whatever need you may have for your project!

Here at PDE (Pre Designed Extensions), we believe in pushing the boundaries of architectural creativity by providing pre-designed solutions that serve as the perfect foundation for your projects. Our subscription-based service offers architects a time-saving way to access pre designed extensions for Semi-Detached and Terrace properties, all of which can be easily customised to meet the needs of your clients.

For a monthly fee, you’ll gain access to hundreds of extension designs for a large variety of house types, available in both Revit and DWG formats. These files include complete existing and proposed plans, elevations, and 3D views, making them an ideal starting point for any project. Simply request the designs, adjust them as needed with your client, and submit them for planning approval. With no watermarks and full editability, you maintain complete control over the final product.

Our service is designed to fit seamlessly into your workflow, giving you the flexibility to adapt designs and save time, without compromising on quality or creativity. Best of all, your subscription can be cancelled at any time, providing the ultimate in convenience and flexibility.


With a vast catalogue of designs available at a minimal cost, PDE provides an efficient and affordable way for architects to meet deadlines and deliver high-quality results. Whether you’re looking for inspiration or a ready-to-use solution, our platform gives you the freedom to focus on what you do best: designing.

Take a peek inside our Catalogue

Take a closer look at what we offer! Below, you’ll find a preview of one Terrace property and one Semi-Detached property from our extensive design catalogue. Each house style comes with a complete range of extension designs. Explore detailed plans, elevations, and immersive 3D views for every design, giving you the full picture of what's possible.

Terrace

Semi Detached

Why PDE?

With PDE, you can simplify your design process and how you quickly you progress from collecting the properties keys to receiving planning permission

01.

Streamlined Process

Our customisable designs integrate easily into your process, speeding up project turnaround and simplifying planning approvals

02.

Scalability

Save time on RIBA stages 1-3, allowing you to take on more clients and increase project capacity without compromising quality

03.

Instant Access

Gain instant access to a comprehensive library of pre-designed extensions, covering a wide range of house styles

04.

No Commitment

Flexible subscription - cancel anytime with no long-term obligations

05.

Fully Customisable

Modify any design to perfectly suit your project’s unique needs

Getting started is easy

With PDE, you can simplify your design process and how you quickly you progress from collecting the properties keys to receiving planning permission

01.

Choose Your Plan

Select the subscription plan that suits your needs and unlock instant access to hundreds of designs

02.

Subscribe and Access

Subscribe for a flexible, no-commitment service and start exploring our extensive design catalogue

03.

Select Property & Design

Identify your property type -Semi Detached or Terrace, and its type - then choose from a range of pre-designed extensions

04.

Download Drawings

Download the detailed, watermark-free drawings, fully customisable to fit your project’s requirements

05.

Submit For Planning

Submit the designs for planning approval yourself, or let us handle the submission for you

Fixed pricing to suit all

We believe in a fair and transparent pricing model - always know what you'll pay. No hidden costs. One flat fee

  • Bronze Architect Plan

    100£
    Every month
    Valid for 12 months
    • Access to Existing Catalogue
    • 1 Download Per Month
    • Existing Drawings
    • DWG Files
  • Silver Architect Plan

    200£
    Every month
    Valid for 12 months
    • Access to Entire Catalogue
    • 2 Downloads Per Month
    • Existing & Proposed Drawings
    • DWG & Revit Files
    • Request New Designs For Existing House Types
  • Gold Architect Plan

    300£
    Every month
    Valid for 12 months
    • Access to Entire Catalogue
    • 5 Downloads Per Month
    • Existing & Proposed Drawings
    • DWG & Revit Files
    • Limited Revisions
    • Request New House Types & Designs
    • 10% Discount on Additional Services

It makes sense

We're everything you need on your journey to success as an Architect

PDE

In House

Large Catalogue Of Designs

Requests & Revisions

Low Cost Scalability

Customisable Design

Flexible Cancellation

Reliable & Consistent

Fixed Price & Affordability

Digital Accessibility & Instant Access

Revit & DWG File Access

Visualise Various Designs of the Property

Fast Design Turnaround

Easily Meet All Project Demands

Additional Services

We offer flexible add-ons to support your unique project needs. No surprises. Just straightforward options to enhance your plans.

Frequently asked questions

Contact us

Need assistance?
Get in touch, and we'll ensure your project runs seamlessly from start to finish.

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