Basement conversion and extension Bayswater W2 London


APT Renovation project manager will visit you at your property in Bayswater London for the initial consultation to discuss your vision about your basement conversion, where we will be delighted to discuss with you what is your ideas and what you would like to create within your basement space.

We can offer a full service which includes submitting your basement project plans to plan and permission application right through to the very last point, or we will be more than happy to just create your basement conversion according to pre-designed projects from your already approved plans.

Our state of art project planning and customer satisfaction factors will endeavor to send you a quotation within 4 days.  If after our initial visit at your property in Bayswater London you have any further questions to discuss our office team and project managers are will be more than happy to help.


If Planning and Design are required for your property in Bayswater London our Architectural Designer is ready to give a hand on to help you realize your vision and personal ideas and go through with every detail you may consider until you are completely happy with yours or our ideas.  Our main aim to make our clients happy and deliver results which stand out.  Every process phase and details will be explained to you from how long planning process should take all the way through step by step building and completion.


We look at Health and Safety very seriously and it is first and foremost attention on every site.  Our construction team are fully trained and adhere to all Health and Safety procedures and issues.


APT Renovation has over 15 years of extensive building experience and as well as Project Manager, Construction Manager and the office staff is always on hand to answer your’s vital questions and give you personal advice.  Before your project will start you will be introduced to your personal Project Manager who will be onsite all throughout the day, every day and who will be your first point of contact. APT Renovation provides basement renovation services as well as basement conversion and basement extension in Bayswater London.


APT Renovation has used Delta Membrane Systems and Pumps for efficient waterproofing and damp proofing for a considerate number of years.


After successful excavation, our team is ready to create your rooms or space at your property in Bayswater to realize your vision working towards making it come to life.  Our dedicated and experienced construction team will work efficiently and passionately to complete your project on basement conversion or basement extension on time with outstanding detail finish.

Our promise for our Clients to be completely 100% happy and content with your project results.


APT Renovation is fully insured and offer a 15-year warranty on any structural work.


Our Building Inspector will visit building site frequently at regular stages throughout the project, their job is to ensure that construction team is adhering to all the latest building regulations and standards. Upon completion of a project, the Building Inspector will make a final visit and you will be issued with a complimentary completion certificate.

APT Renovation builders basement conversion and basement extension Bayswater London

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Company Number: 8967475

VAT Registration: 186 6752 59


Unit 6, Zennor Road
Bayswater W2 0PS

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If you are an existing client and need to contact us urgently, please call the mobile number of your Project Manager


Our clients always ask this question, as they would like to get a rough idea regarding the cost. However, the reality is that the answer is never straight forward because each individual project will be different and will depend on a number of aspects. We need to closely look into multiple factors such as the materials needed, the clients’ vision, the budget and the timeframe before we can give a clear quotation. With that being said, we can give a rough estimate during the site visit meeting. From our previous experience in basements, we can give some understanding of what you might expect:


£4700 – £6720 PER SQ M APPROX.

This figure is a rough idea at what cost a basement conversion in my area will be. The range is a correlation between the different level in finish. There is always the possibility of other costs being incurred when looked at in greater depth.


£1200 – £2400 PER SQ M APPROX.

We use Delta membranes for damp proofing. Depending on the state of the walls and the ground, Damp proofing membranes can be used to full or medium coverage.

Is planning permission obligatory?

For the most part, you will not need a planning permission for a basement excavation, as the changes do not breach the area of your building plan and usually wont exceed outside your building structure. However, there are times when parts of the basement conversion project may require planning permission if it does goes outside of the building plan. Your local council is the first contact point when it comes to the planning permission.

It is always recommended that you should be familiar with basement conversion requirements before you start planning your project.

Do I gain financial benefits from a conversion?

Not only does adding additional space improve the scale of a living space and boosts comfort, market research shows that you will also gain financial benefit if you wish to sell your property in the future. Basements can be transformed to amazing living spaces such as wet rooms, spas, pools and entertainment rooms with proper ventilation and heating.

It’s important to remember that the value of your property can skyrocket after a basement renovation.

We will visit you at your premises to discuss what you would like to create within your new or existing basement space. We are happy to answer all essential questions you may have during our initial visit.

We offer a full service which includes submitting plans right through to the very last detail, or we can just create your basement conversion project from your existing gained plans. APT Renovation will send you a quotation within 4 days.

Why choose us?

In house experts

Architectural Designer, project manager, structural engineer and full construction team all under one roof for an all inclusive on service.


A fast seamless planning, design and construction process with immediate start of project when you are ready

No Upfront Payment

You only start payments to us
once we are under way and
you are happy with the progress so far

15 Year Warranty*

APT Renovation will guarantee 15 years warranty on structural work carried by us.

Clients feedback

APT Renovation team are always happy to hear your thoughts about your project, either on the phone or in person.

If you’d like to know more please arrange a FREE no obligation site meeting you.

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