Use our form to estimate the initial cost of construction or conversion.

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When it comes to choosing a contractor to convert the basement in your home, quality and trust should never be compromised. Working with a professional is an absolute must. With over 20 years experience and a real focus on customer satisfaction, you can rely on Select Basements Ltd for your next renovation, conversion or construction of your cellar. Our installations are carried out by fully trained staff to the highest professional standards. Always on time and on budget. As an Wykamol approved contractor we offer guaranteed services which are fully insured through the GPI and  CGS scheme

Select basements have proven results for setting exceptional standards in cost control, planning, scheduling and project safety. We have experience that gives us a competitive advantage over others in our field.


With over 15 years experience and a real focus on customer satisfaction, you can rely on us for your next project. We provide a professional basement conversion and construction services with a real focus on customer satisfaction.

  • GPI and CGS Insured
  • Wykamol Approved Contractor
  • Quality and Value to the Projects We Deliver
  • Highest Standards in Cost Control
  • On Time and on Budget
  • Real Focus on Customer Satisfaction


  • Are there different types of basement conversion?

    There are many different ways and different types of things we can do to convert your basement, prior to the project you will specify what your requirements are for the conversion and it will then be our team of basement and conversion construction specialists to provide you with the best conversion money can buy.

  • What is the timeline for the project?

    A simple cellar conversion can be completed in a matter of weeks. Converting a single-room cellar using a membrane lining system can take just two or three weeks, including digging out the sump and fitting the pumping system.

    Converting and extending the cellar beneath an entire house, involving underpinning of the existing structure, is likely to take several months.

  • What is the total budget for the conversion?

    Providing there is adequate headroom, turning an existing cellar into extra living space would cost around the same as for a simple loft conversion, at around £1000–1,350/m². It is only when you have to start lowering the floor level to increase headroom, involving digging out the ground beneath the house and underpinning the foundations, that the work starts to get expensive at £2-4,000/m².

  • Will I Need to Move Out?

    If there is access directly onto the garden or highway for the removal of soil and your existing ground floor is suspended timber, you can probably continue living in your home whilst work is under way. If the ground floor has to be removed and rebuilt because it is concrete, and all of the soil has to be carried through the house, you will almost certainly have to move out.

Basic Basement Conversion

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