Converting your Cellar or Basement - Quality Basement Conversions at London's Cheapest Prices
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London Basement Conversion

Converting Your Basement - Design Build and Renovation

Cellar and Basement conversions are an ideal way to extend the living space in your property. The space exists already - waiting to be converted into an office, extra sitting room, bathroom, sauna or a gym. Larger basements can be converted into a self contained flat - providing significant rental income. have three decades of experience in converting basements and cellars - from small to very large. Contact us for a chat with and we will let you know what is possible and provide you with a detailed quote. We will also explain what the Basement Conversion Process is and explain the warranty and guarantees available with all work from We have many happy clients and can arrange for some of these to be contacted directly for references.

Basement and Cellar Conversion London Once you have decided to go ahead will look after all aspects of the basement construction process including

  • Planning Consent
  • Building Regulations
  • Architectural Drawings
  • Structural Engineering Reports
  • Damp Proofing
  • Foundation Underpinning
  • Water Proofing/Tanking
  • All Construction Work
  • Interior Design

We have a team of fully qualified and experienced tradesmen who will look after the drainage and ground works, underpinning, plastering, electrical work, carpentry, plumbing and painting and decorating.

Basement Portfolio >>

Basement Conversion Feasibility

Is the house suitable?

Properties which have an existing cellar or coal chute are ideal for conversion. The ceiling height needs to be at least 2.4 metres - which may involve a little digging.

Home Ciena in Basement Pimlico

General Portfolio >>

Planning Permission

Do Basements need Planning Permission?

Planning permission is not normally required for basement conversions. Exceptions are for a change of use such as a garage. Listed, conservation area and heritage buildings will need planning permission.

Panning Permission

Planning Applications >>

Basement Damp Proofing

Water Proofing/Damp Proofing have the expertise to install basement sump pumps combined with damp proof membranes and Tanking which pump any collected water to an external drain.

This system is recommended for water proofing basements and cellars, as well as properties that are at risk from flooding.

We install a P20 Tanking System which works by directing any water in the cellar walls, down the outside of the membrane and channeling it into a sump and pump system in the floor. The water is pumped into the external mains once it reaches a preset level.

Damp Proofing >>

Basement Conversion in Maida Vale

Case Study 1: A Large Detached 1950's House

Basement ConversionThe client was a London architect and produced his own drawings and design. The basement conversion consisted of

  • A large self contained designer basement flat
  • One large double bedroom with a walk in wardrobe
  • Separate Bathroom and Toilet
  • Open plan lounge and kitchen
  • Double patio doors and security grill
  • Entrances/Exits to the front and back
  • Air conditioning and security cameras were also installed

The basement conversion took 2 months to complete at a cost of £82.500. The client was able to remain in the main house the whole of the time

Loft Conversion Photo Portfolio >>

Building Regulations

Basement Building Regulations

Full Compliance with Building Regulations is required Download our PDF Basement Construction Files

With over 30 years of experience of Basement conversions our designs meet all building regulations.

Basement Building Regulations >>

Basement Party Wall Agreements

If you converting abasement in a semi detached or terraced house you will need to ensure that any work on walls that you have in common with your neighbours conforms to the regulations specified in The Party Wall Act 1996.

In the case of basement conversions neighbours should have absolutely no objections but is good manners to let them know in advance about the basement conversion and any disruption that may be caused during the building process

. If your neighbour refuses to cooperate and refuses to fill out the Party Structure Notice they will need to hire a surveyor who will impartially assess the standard of work being carried out.

Basement Party Wall Act Guide >>

Basement Price Promise

For Your Peace of Mind will fund the first £10,000 worth of work on your basement conversions.

This is your assurance of our professionalism and commitment to quality workmanship.

We will never compromise the quality and finish of our basement conversions by taking short cuts in order to reduce cost. We offer High quality beautifully finished basements at real value for money at the cheapest prices in London.

Our outstanding reputation for Service Excellence, Quality Workmanship and Beautiful Finishes is why our customers love us.

Customers >>

Basement Conversion in St Johns Wood

Case Study 2: Basement in a 4 Storey Victorian House

Basement ConversionThe basement in the property consisted of several small rooms and had no access to the back garden. The client required an open plan design with a contemporary feel to use as a sports and fitness area.

  • Architectural plans were produced
  • A structural Survey was made
  • Internal walls were removed
  • Steels were put in place
  • Digging out was required to increase ceiling height.
  • Our interior designer was consulted

The result was a large contemporary, open living space with a definite wow factor. The conversion took approximately 5 weeks and came in on budget at £49,000.

Customer References >>

Project Management

All Basements are Project Managed

With project management comes as standard. We can take care of planning applications, building regs, and structural engineering. Our project manager will also ensure that all work is up to specification as the work progresses.

Basement Project Management

Project Management >>

Commercial Basements

Restaurants, Clubs, and Car Parks,

Large basements can be converted into restaurants, clubs and staff car parks providing an additional revenue stream. undertake all types of commercial conversions for clients throughout London.

Basement Club Soho

General Portfolio >>

Structural Repairs and Alterations

Structural Changes to Basements carries all Structural alterations including excavation and removal of spoil, re-enforced concrete and steel works, damp proofing and tanking, foundation under pinning, drainage and ground work.

Basement Structural Work

Structural Repairs and Alterations >>