Reimagine your home's Layout with a London Rear Extension.
- Maximise your living space with expert rear extension in London
- Customised solutions that blend seamlessly with your requirements
- Offer the best value for your investment

Rear Extension Design & Structural Engineering Services UK
At ParamountBuilt, we not only promise to design rear extensions, we help create spaces where life happens. By incorporating advanced design software’s and techniques along with our engineering skills, the team designs the space by keeping your lifestyle in mind for perfection and precision. Our rear extension company blends thoughtful architectural designs with precise structural engineering to ensure every extension is not only beautiful but safe, practical and built to last.
From the first sketch to the completion of a project, we guarantee that our work is up-to-code and exceeds expectations. Even if you need a new living room, kitchen, or home office, our custom solutions will not only add value to your property but improve your standard of living. Let us use our accuracy and experience to fulfil your vision.


Ground Floor Rear Extension
Our chartered architects demonstrate their craft through the ground floor (single-storey) rear extension in London, which enhances the connection of the house to the garden space and nature.

Double Storey Extension
We provide the most creative architectural designs and make sure that the new structure blends with the existing design of the house efficiently. We do precise calculations to determine if the double-storey extension will be safe and stable.

Living Area Extension
We will assist you in describing your living space as well as designing an interior arrangement that accommodates your functional objectives. We will evaluate what your plans involve and tell you what changes, if any, need to be made to support the new space.

Rear Extension Planning Permission
We assist you in obtaining the required permissions for your plans and ensure that all local scopes and building regulations are complied with so your chances of gaining approval are increased.

Flat Roof Rear Extension
We develop new sleek and minimalist designs for modern homes, enabling the effortless addition of stylish contemporary flat roof rear extensions. The team ensures that the flat roof has proper drainage and waterproofing systems so that it will not leak and will last for a long time.
Potential challenges with Rear House Extension:
Since investing in extending a home is very costly, care must be taken when deciding the appropriate company to handle the project. Ace Design and Build integrates architectural design with the technical precision of calculations to ensure the client’s extension is beautiful, useful and compliant.
Party wall issue
Construction near or on a boundary line requires a Party Wall Agreement with your neighbours. Disputes often arise when construction access is required to a neighbour's property. ParamountBuilt can help deal with these issues and resolve any conflicts that may occur.
Position of the main hall
The main hall of the house may lose continuity when the back of the house is extended. Our rear extension designs in London promote the seamless interaction of space between the existing house and the new extension, enabling your main hall to function naturally.
The shadow cast on neighbouring windows.
Building out the rear of your house may result in shadows being cast over your neighbour's property, which can be problematic. To foster good neighbourly relationships, we can alter the design and height of your extension to reduce overshadowing.
Position of trees and hedges
Preserved trees can be a problem when trying to extend the house. In addition, trees and hedges nearby the house extension may cause root damage to the foundation. We can help with resolving planning issues and offer other options.
Load Bearing walls
Any attempts to remove, modify, or add to the load-bearing walls of a home can drastically reduce its strength. Our structural engineer will look at the current structure to check if there are Load-bearing walls. They can suggest other ways of supporting the structure without these walls or ways to provide support while still maintaining the integrity.
Weak Foundations
Poor or not deep enough foundations will often result in settlement or sideways movement of the structure, maybe cracking, and can lead to collapse. Our trained professionals will inspect the available foundations in order to verify their adequacy for the extension weight.

Adam Smith
Great Team, highly recommended for remodelling and renovation work

Jhon Deo
Click edit button to change this text. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.

Maria Mak
Click edit button to change this text. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.

Jackma Kalin
Click edit button to change this text. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.

Amily Moalin
Click edit button to change this text. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.

Enagol Ame
Click edit button to change this text. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.
FAQ’S
Most rear extensions in London are permitted developments and do not require planning permission. However, more significant deviations, as well as changes made in conservation zones, will need to be approved by the local council.
A rear extension typically takes eight to sixteen weeks to complete; this varies with the size and complexity of the construction and how much planning approval is needed. More intricate designs will take longer.
Depending on location and quality, it is estimated that a rear extension will increase the value of your house by somewhere between ten to twenty percent. A professional evaluation will suffice for a more precise estimate.
Yes, a party wall agreement will be required for a rear extension if the construction impacts either a shared wall, boundary, or bordering property. This is done under the Party Wall Act of 1996 in order to prevent conflict.
Using large glass doors, skylights, and bi-fold windows allows space to be exposed to maximum natural light. Additionally, using light colours enhances brightness within the room.