At APT Renovation Design + Build, we pride ourselves on providing original and creative design solutions, an integrated design process, eco-friendly building materials and technologies, high quality craftsmanship, and above all, extraordinary customer service.

Explore how we can improve your existing living space.

Design & Build Basement Conversion company in Chelsea London

APT Renovation – Design & Build can take care of all aspects of basement conversion project in your property in Chelsea and surroundings throughout whole planning stages and design process, excavation to construction of the core base and waterproofing finalizing with fit-out and completion. APT Renovation offer a complete specialist cellar conversion and renovation service. Our construction team will undertake the whole fit-out phase of your project. The major benefit of our service that you can work with a single team of specialists under one roof. These Include:

Design Consultants, Basement Structural Architects, Structural Engineers and Builders who have over 10 years of experience as a team in modelling, designing and building beautiful homes across Chelsea. We can also take care of all aspects including planning applications, project cost estimation, development of detailed designs, and specification of fine materials and finishes.

Basements and cellars are becoming popular among London residents who wish to utilize unused space below ground floor to transform to something pleasant to live. Also new ground space can be used to for items as the boiler, water heater, car park, and smart air-conditioning systems; However, in London basements are often renovated to a high standard and used as living space.

Newly excavated cellar space can be used in to achieve additional below-ground floor of a home.

Basement renovation in single-family detached houses are becoming more popular in London as long as fits with flood risk assessment. Basements are becoming more strict and complicated to construct in central populated areas of London with neighbor at your property in Chelsea can help to reduce heating and cooling costs.

Design & Build

Our in house team of qualified architectural designers and fine builders are capable to undertake any project small to large.

Our first step towards extension we will be to arrange free site visit at your property in Chelsea. We will discuss your basement conversion requirements and your ideas with you to form a design brief. This brief becomes our main objective. Using our extensive knowledge and experience we will advise you where the design will need to be tweaked to get the most out of your proposal and we will strive to exceed your expectations.

After the initial design approved by you, if required APT Renovation can take care of all the necessary plans etc, we will submit the basement conversion designs for a planning application when required and the building control application.

We will act as agent on behalf of you, so for the most part all you need to worry about is paying the fees and waiting for the decision. We ensure that the designs that go in for the planning application have had the construction thought out and can be built without fundamental modification to the design. If you are looking for home renovation specialist or whether you need basement extension London contact APT Renovation.

Who we are

APT Renovation – Design & Build offer full-service design and build services tailor-made to your personal needs, and undertake residential renovation and remodelling projects delivered and managed by team of

• Project managers

• Architects

• Design consultants

• Quantity Surveyors

• Structural Engineers and professional Builders.

We are one of the very few firms who choose not to ask for deposits or upfront payments.

We take care of everything

APT Renovation offer full-service design and build services:

• Architectural Drawings

• Planning applications

• Building Control

• Project cost estimation

• Detailed architectural CAD / 3D designs

• Construction

As well as detailed specification of fine materials and finishes.

EXPLORE THE TYPES OF BASEMENTS

GUEST LOUNGE

basement conversion entertainment room

STUDY ROOM

basement-study-rooms

PLAYGROUND

basement-extension-kids

GYM

basement conversion gym

WET ROOMS

contemporary-master-bathroom-with-rain-shower-i_g-IS5ms6rb2mish31000000000-WkNge

POOLS

basement-extension-london

Stages of your basement extension projects.

START TO FINISH
From initial meet up at your property in Chelsea our office team will always be available as is your Project Manager to advise you should you need it and are happy to help in any way they can. We do not contract our work out so you will see the same team every day.

DESIGN AND CONSULTATION
APT Renovation are happy to supply you with a fully inclusive service, from initial meeting with our Architect, submitting plans to local authority, building control application and Structural Engineers calculations and drawings, right through to carrying out the works as detailed in your Schedule of Works. However, we are also happy to work with your own Architect and design team.

LOCAL AUTHORITY APPROVAL
Upon commencement of works you will be introduced to your Project Manager who will be onsite all day every day and will be your first point of contact should an issue arise or just to ask how the project is progressing. If required your project configuration and modelling and regulation documents will be submitted to you local council authority.

ROUTINE BUILDING CONTROL CHECKS
A Building Inspector will visit at regular stages throughout the project, their job is to make sure that we are adhering to all the latest building regulations. Upon completion of works The Building Inspector will make a final visit and you will be issued with a completion certificate.

CERTIFICATES
Upon completion of all works and having gained approval from The Building Inspector we will supply you with all relevant safety certificates.

ROUTINE BUILDING CONTROL CHECKS

A Building Inspector and Project Manager will visit you at your property  in Chelsea at regular stages throughout the project, their job is to make sure that we are adhering to all the latest building regulations. Upon completion of works The Building Inspector will make a final visit and you will be issued with a completion certificate.

Start the process of designing and building house or kitchen extension. Call today!

Our design and construction team will help you create a space you will love, delivered on time and on budget.

Let’s Talk House & Kitchen Extensions

Get a Free Quote

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APT Renovation is basement specialist in London who has extensive experience and able to deliver basement conversion requirement on time, budget and meet your expectation.

HOW WE WORK

Free a No Obligation Site Visit / Consultation

APT Renovation will visit you at your premises at Chelsea to discuss what would you 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.
APT Renovation can offer a full service which includes submitting plans right through to the very last detail, or we are happy to just create your basement conversion project from your already gained plans.
APT Renovation will ensure to send you a quotation within 4 days.

Design Service

If you require a Planning and Design service for your basement conversion project, our in-house Architects, Structural Engineer, and Party Wall Surveyor are at hand to help you visualise your plans and go through them with you until you are completely happy with the final ideas. Our primary concern is to make our clients happy, so every process will be explained to you from beginning to end.

British Standard 8102:2009

British Standard 8102:2009 is the ‘Code of practice for protection of below ground structures against water from the ground’. In essence, it is the primary design guide for structural waterproofing in the UK, with the recent update being released in November 2009. If you are producing a waterproofing design, or you have advisors that are designing on your behalf, this document should cover every consideration possible. If you have further questions in regards to the BS8102, please feel free to contact us.

basement conversion tanking

Tanking

Tanking, or ‘Type A barrier protection’ (BS8102 definition), is a specific form of waterproofing, although it is a common term applied to all forms of waterproofing. In the true sense of the word, tanking means blocking water out of a structure by employing a barrier product which is installed internally, sandwiched within, or applied externally to a structure. Tanking is still widely employed in new construction, but has declined in popularity in recent years where retrofit protection is required for existing basements.

basement design and build excavation

Construction

An intuitive construction process of all basement conversion projects is monitored and overseen by managing director, Andi Pepaj, and managed by our project managers onsite.

APT Renovation has over 17 years experience in underpinning and basement excavation following standards at very high level finish.

You will be advised by your Project Manager who will be on site all day, every day and will be your first point of contact.

health and safety during basment excavation

Health and Safety on every stage

Health and Safety is of the utmost importance on every site that we work on, as it not only concerns all of our staff members, but everyone else in the vicinity; including you, your neighbours in AChelsea and even passers-by. Due to the nature of our work, there is always the risk of injury or even death, as ladders, tools and various other materials can be hazardous. Basement conversions in particular are technically very challenging, and can pose a number of different risks, with a large proportion of these projects in London regularly failing safety checks. Unguarded excavations and unprotected floor openings represent serious dangers to all those concerned. That is why our staff are expertly trained and will always diligently adhere to all necessary Health and Safety procedures and issues.

basement conversion waterproofing

Waterproofing

Waterproofing is a very important aspect in basement conversion, particularly as the UK experiences a very high level of rainfall each year. A lack of waterproofing will eventually result in damp on walls, which not only look bad, but smell bad as well, and can cause significant damage to the paint job, the plastering and the finish. Worse still, damp can also lead to breathing problems and other health issues, so it is something that should be nipped in the bud.

APT Renovation have had huge success over the years in waterproofing with Delta Membrane Systems and pumps. For basement waterproofing, the Delta sealed system ensures that all membranes are expertly sealed and secured, as well as any protrusions or crevices. Delta Systems are incredibly effective in dealing with adverse water conditions and especially have the propensity to flood. There is an offer of a 30-year guarantee on all Delta membrane systems.

Visit the Delta website

basement conversion fit out

Fit-Out

Our construction team will be ready to make the rooms or space in your basement at your house or flat in Chelsea that you have been dreaming of, come to life. Our dedicated and experienced tradesmen will work tirelessly to complete your project on time with no stone being left unturned. Our aim is for you to be completely happy with the work, and we will only sign off the project once you have deemed it necessary to.

Insurance and Guarantees

APT Renovation hold public liability insurance, and an all risks cover. This will cover you and our builders. APT Renovation Ltd offer a 15 year warranty on all structural work.

With hundreds of basement conversion projects completed in London and Chelsea to date, APT Renovation has an outstanding reputation for being conversion specialists, dedicated to creating state of the art spaces, with immaculate attention to detail.

Upon final completion of project the client will receive following documentation where applicable:

Gas Safety Certificate, Electrical Sign Off Certificate, Drainage Layout, Plans as Built Drawings, Manufacturers Instructions For Appliances, Manufacturers Guarantees For Appliances, 10 Year Structural Guarantee

ROUTINE BUILDING CONTROL CHECKS

A Building Inspector will visit at regular stages throughout the project, their job is to make sure that we are adhering to all the latest building regulations. Upon completion of works The Building Inspector will make a final visit and you will be issued with a completion certificate.

CERTIFICATES

We can take care of all aspects of basement conversion project throughout whole planning stages and design process, excavation to construction of the core base and waterproofing finalizing with fit-out and completion. APT Renovation offer a complete basement space extension and renovation service. Our own construction team will undertake the whole fit-out phase of the project. The major benefit of our service that you can work with a single team of specialists under one roof. These Include:

Design Consultants, Architects, Structural Engineers and Builders who have over 10 years of experience as a team in modelling, designing and building beautiful homes across London. We can also take care of all aspects including planning applications, project cost estimation, development of detailed designs, and specification of fine materials and finishes.

APT Renovation is Basements conversion company in based in Balham, London are leading cellar and basement conversion specialists in design and build CAD designs, groundwork, excavation, delta membrane waterproofing, tailored for residential homes. We are bale to convert your existing or new basement space to simply gain extra space or whether it is comfortable living space such as entertainment area, playground for children and wet rooms to the extend even building a swimming pool s and gym, We have vast experience to create outstanding living space beneath your property.

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