Side extension service London
Get the perfect solutions for a brighter and aesthetically appealing pace with Plansing’s top notch side extension London. Our team is known for its unmatched level of expertise, project management and seamless customer care. Get our side extension plans London to expand the space along with the functionality for your property.
What is a side extension?

A side extension is a smart and creative option for adding a functional living area without sacrificing the garden. It is possible to have a large kitchen, an airy dining room, or even an open-plan living space when the side extension is constructed to the unused side of the house.
A property side extension integrates perfectly with the owner’s existing property, improves its value, enhances natural light, and increases its flow and functionality. With any alteration from modern expansion to traditional makeover, our side extension company provides a comprehensive design and structural engineering service to change your house into a better, brighter, and bigger home.
Side extension under permitted development and prior approval
Securing the necessary permits for a home extension project can be quite challenging, but it needs to be considered.
Certain properties possess permitted development rights, which is beneficial as it allows the homeowner to make certain alterations to their house, like adding a side extension, without applying for planning permission.
To qualify under PDR, side extensions are required to not exceed fifty percent of the total width of the house, and in addition to that, the height and materials used have to match the style of the house. If an extension goes beyond the set limits, prior approval from the local council may be required.
To get started, let’s plan how you want the end result to look like!

Side return extension company London

Want to make a side return extension in london? Plansing can be your top pick to upgrade your extensions into magnificent designs. We offer outstanding side extension drawings London, that are not only appealing but are also of the utmost quality.
Side return extensions are perfect if you want to improve your home by letting in natural light, creating additional living space, and effortlessly merging the indoors and outdoors.
Our side return extension architect completes the projects that are catered to the client’s needs. They work with your freedoms with development changes and requests and plan legislation for London. Our team makes sure that every extension is accordingly built and compliant to the law while looking stunning.
What benefits more, single or double-storey side extension?
While both single-storey side extensions and double-storey side extensions are valuable, the best option really depends on you and your lifestyle. Each option is different, so here is how they compare:

Benefits Single-Storey Side Extension
1
- Additional lower-cost option – Less expensive with regards to construction and extension approval.
- Construction in completion is quicker with Minimal disruption.
- Wonderful for open-plan style living. Particularly good for kitchen, dining room, or living room extensions.
- Planning approval is easier. Often approved as permitted development with less restrictions.
- Improves the appeal of the property and adds useful space increasing the functionality of your home.
Benefits Double-Storey Side Extension
2
2
- Increases the usable living area twofold by adding lower and upper floor rooms.
- Greatly increases the value for resale purposes.
- Responsive to extra bedrooms, bathrooms and a home office.
- The extra space outweighs the extra cost needed to construct the building.
- Makes housing more ideal for a growing family or rental purposes, thus more useful.

Which One Is Right For You?
For a quick low budget expansion single-storey extensions are better, but for more space and long term value double-storey are the smarter investment.
So, get the innovative side return extension ideas at Plansing. And let us help you start planning the perfect home extension for you!
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Testimonials
GOOD Based on 28 reviews Rumi Das2024-11-06Trustindex verifies that the original source of the review is Google. Following a boundary issue, they helped secure a fair and timely party wall award. Their legal expertise made the entire process smooth, and I’m credibly grateful for their support—it saved me from a lot of stress. Thanks Ra2024-11-04Trustindex verifies that the original source of the review is Google. I hired professional architects and engineers from Plansing for my remodeling project, and what I do is just sit back and watch them showcase their skills. I was happy with the final results. Nazi Finley2024-10-29Trustindex verifies that the original source of the review is Google. I had a result from the first time I used Plansing for my Site survey Project. Having read some of the reviews i was almost in two minds whether to order or not. But I gave them a go - no problems what so ever. Good communication and quick deliver service for Site survey. Cheaper than other sites too Will use again. Moru Flex2024-09-16Trustindex verifies that the original source of the review is Google. Plansing was able to complete our partition wall project on schedule and within budget, even though we had a strict deadline. They always went above and beyond to make sure we were happy, and their crew was really well-organized and productive. Their dedication to high-quality work and their attention to detail really pleased us. Kurt Smith2024-08-16Trustindex verifies that the original source of the review is Google. This is an formal firm to deal with. After the free survey, where the surveyor modified my error on the type of loft support I wanted. No deposit was required. During the time between survey the office team reserved me updated on the process. About a week already they arranged for a primary start and finish to avoid the worst of the heat that was prediction. The loft space took 69sq meters of insulation and 220sq foot of new boarding. Their work is guaranteed for 10 years! I would strongly recommend them.
Owner's reply
Thank you so much for your kind review! We’re pleased to hear that you had a positive experience with our team. Your satisfaction with the insulation and boarding, along with our 10-year guarantee, means a lot to us. Thank you for recommending us, and if you need anything in the future, we’re here to help! Best regards, PLANSING TEAM Antonia Orr2024-07-18Trustindex verifies that the original source of the review is Google. I purchase architectural drawing, the team is knowledgeable and honest, my project completed on the time. Thanks plansing
Owner's reply
"Thank you for your wonderful review, Antonia Orr. We're delighted to hear that you found our team knowledgeable and honest, and that your project was completed on time. Your satisfaction is our top priority, and we appreciate your kind words. We look forward to working with you again in the future!"
FAQs
Planning permission for your rear extension is not necessarily required if it comes under the rules of permitted development. Usually, single-storey buildings must be under 4m in height and no wider than half of the original area. Still, it is suggested that you check your local building rules.
It is not legally needed to hire an architect for your side extension project if it does not include any time of complexities. But a qualified architect ensures a well designed, structurally sound and compliant extension, it also secures planning approval if required.
Usually, a side extension adds almost 5 to 12% value to the property, depending on the size, location and design of the extension.
The time to complete an extension depends on various factors, such as the project size and complexities. On average, a single-storey extension takes almost 8 to 12 weeks for completion, excluding
In the UK, you can usually build a side extension up to the boundary under permitted development rights. Still, it must be no more than half of the width of the original house.
- Initial project plans
- Plans layout
- Technical drawings
- Planning application advice
No, your neighbours are not allowed to remove your fence without your permission to build an extension. If the fence is on your boundary, it legally belongs to you. So, always check the property boundaries and consult a party wall surveyor if required.