A Home Owner’s Dream:
Only a few steps between you and your dream property.
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!
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Welcome to PDE (Pre Designed Extensions) – where we make it easier than ever for you to take the first steps towards your dream home. We know that planning a home extension can feel overwhelming, especially with the belief that you can only have two out of three things: affordability, quality, or speed. But we’re here to change that.
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At PDE, we provide expertly crafted pre-designed extension plans that save you time, money, and stress. Whether you're looking to create more space for your family or add value to your property, our streamlined process allows you to secure planning permission or a permitted development certificate in as little as 24 hours after placing your order. Even with custom changes, we’ll have your plans ready within 48 to 72 hours – a far cry from the weeks or months you might otherwise wait.
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With our extensive catalogue of designs tailored to Semi-Detached and Terrace homes, you’ll find options that suit your style and needs. Our plans are not just affordable – they’re designed to rival the quality you’d expect from high-cost architects, ensuring you don’t have to compromise on your vision.
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Getting started with PDE is simple. Browse our designs, choose the one that fits your project, and let us handle the rest. We’ll guide you through the process to make sure everything is seamless, so you can focus on the excitement of bringing your ideas to life.
Your perfect extension is closer than you think – and at PDE, we’re here to help you get there faster, for less, and without compromise. Let’s make your dream home a reality.
Select your style of housing
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​Take a closer look at what we offer! Below, you’ll find the catalogues for our Terrace and Semi Detached properties. Pick which one represents the property you are looking for and explore our full range of House Types. 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.
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Terrace
Semi Detached

The process made simple
See how our streamlined process gets you from concept to completion with ease
Select your style of Housing
(Terrace or Semi Detached)
Select your houses Design Type
(Terrace ranges 1-17 and Semi Detached ranges 1-13)
Pick from the various Design Options what you would like done to your property
(Categories consist of Back, Side, Wrap Around, Loft and Porch Extensions)
Add the design to your cart, stating the size of the extension you require and if you would like any internal or external changes made
(In the store section locate the House Type and design or click Add to Cart in the Catalogue Page under your chosen design)
Purchase the desired drawings
Your amended drawings will be emailed to you within 24-72 hours ready for you to apply for planning permission or for a permitted development certificate
Additionally an Online Consultation is available if you have any questions or you can get in contact via the Contact Us section below or Email
Fixed pricing to suit all
We believe in a fair and transparent pricing model - always know what you'll pay. No hidden costs.





Side Extension
£1000
Back Extension
£1000
Loft Extension
£1000
Wrap Around Extension
£1500
Porch Extension
£600
Additional Options:
Garden Outbuilding - £750
3D Visuals - £300 per image
Planning Application Submission - £150
3D Revit Model - £250
DWG Files - £75
Designed with you in mind
Practical, personalised, and professional services for every homeowner

Home Owners
Our services are designed to offer an easy, affordable and stress-free path to realizing your renovation dreams. We take pride in our highly competitive pricing and unwavering commitment to transparency in all aspects of our service.
Designing your dream home does not have to be a long, scary and complicated process and our affordability enables you to allocate more of your budget towards the actual construction and finishing stages, ensuring that your dream home takes shape exactly as it has been envisioned.
Start your journey with us where you're already 50% of the way to the finish line.

























