A Property Developer’s Dream:
Ready-to-Use Architectural Designs, Anytime.
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 are committed to defying the conventional beliefs that restrict possibilities in architectural projects. We specialise in obtaining planning permissions and permitted development certificates by providing Pre Designed Extensions tailored to a large number of Semi Detached and Terrace properties.
We aim to modernise the architectural process by offering a flexible, subscription-based service. For a monthly fee, you’ll gain instant access to hundreds of pre-designed extensions tailored to various housing styles. You can download these designs without watermarks, customise them to your needs, and submit them for planning approval with ease. Subscriptions can be cancelled at any time, offering ultimate flexibility.
With a vast design catalogue at your fingertips for a fraction of the cost of traditional architects, our service offers incredible value. Whether you need ready-to-use drawings or want to customise a design, PDE gives you the flexibility to bring your vision to life without the hefty price tag.
Have any questions? Don’t hesitate to reach out - our team is here to support you every step of the way
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, as well as a close up of all of our House Types available. 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
Simplifies both design and planning, making the project smoother and faster
02.
Cost & Time Efficiency
Save both money and time compared to traditional architectural services
03.
Instant Access
Get immediate access to hundreds of pre-designed extensions
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 Property Developer Plan
100£Every monthValid for 12 months- Access to Entire Catalogue
- 1 Download Per Month
- Limited Changes to Drawings
- PDF Files
- Cancel Anytime
Silver Property Developer Plan
150£Every monthValid for 12 months- Access to Entire Catalogue
- 2 Downloads Per Month
- Unlimited Changes to Drawings
- PDF Files
- Cancel Anytime
- Most Popular
Gold Property Developer Plan
200£Every month- Access to Entire Catalogue
- Unlimited Downloads Per Month
- Unlimited Changes to Drawings
- PDF & DWG Files
- 1 Online Design Consultation Per Month
- 1 Free Planning Submission Per Year
- Cancel Anytime
It makes sense
We're everything you need on your planning journey to success as a Property Developer
PDE
Architect
Large Catalogue Of Designs
Unlimited Requests & Revisions
Fast Turnaround
Design Consultations
Complete Transparency
Reliable & Consistent
Fixed Price & Affordability
Digital Accessibility & Instant Access
Planning Submission Assistance
Visualise Your Property in Various Designs
Expertise in Planning Regulations
Meets All Project Planning Demands




























