Loft Conversion
Experts London
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10 Year Warranty
Home Extensions
Loft Conversion
Design & Planning

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About Us

Our Clients – Our Priority
Everyone’s needs are different so we treat you as an individual and we offer a bespoke professional service prioritising your needs … not ours.
Our Expertise
Your conversion will be undertaken by our dedicated, non-subcontracted teams. Full insurance liability and warranties are provided by SMA.
Fixed Price Quote
We will only work to a fixed price quotation and our aim at the outset, is to capture the entire project specification as far as is possible.
Established since 1996
With over 2100 loft conversions completed throughout London you can be assured that your house is in safe hands.
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What we do | See our services below:
Loft Conversions

SMA Loft Conversions In-House Design Service can help design the loft conversion of your dreams that fully utilises the available space & complies with council planning regulations.

Design & Planning

Our design staff will directly arrange a date & time convenient for you, to visit your home, carry out a survey and assess your needs.

Home Extensions

We are experts in both single and double storey extensions and offer a professional service at competitive prices.

Loft Conversion IDEAS

Children’s Rooms

Converting a loft to a bedroom for children or other family members is the perfect way to keep the kids happy and the adult lounge area clean & quiet. A Loft Conversion is the perfect choice for a growing family.

Extra Bathroom

You can always use another bathroom in your home and the best way to include an additional bathroom is to convert your loft. You can also include a spa bath for ultimate luxury and a significantly increased home valuation.

Home Office or Study

Do you run a home based or part time business that needs extra space or more privacy? Then a loft conversion into a office/study could be what you need.

Master Bedroom with Ensuite

Need to create a new master bedroom with more privacy? Then a loft conversion into a Master bedroom with en-suite is what you need. The perfect oasis of calm for to escape the pace of busy family life.

Studio Flat

Need a separate living area for a relative or flat mate? We can install a single all-in-one bedroom, kitchen, bathroom combination to suit your needs.

Living/Family Room

For when you have guests over or just want to have a living room that is private and sound proof then a loft conversion to living room is what you need.


SMA Lofts has been established since 1996, trading continuously since then. To date, we have completed over 2100 Lofts in and around the London area.

Originally a specialist loft conversion company, we have expanded to include extensions & refurbishment work at the behest of our clients. We provide a full service package. Initially we will provide design drawings and a fixed price quotation. Our contract is based on our quotation so there are no hidden surprises or small print!

  • Loft Conversions
  • House Extensions
  • Design & Planning
  • Velux Windows & Blinds

SMA Loft Conversions & Extensions have been a London based building company since 1996. We design and build loft conversions and extensions throughout London and the suburbs.

Our goals are to provide a highly professional and quality service tailored to suit your individual needs working to achieve a combination of aesthetically pleasing, practical and cost effective solutions for your project.

As our entire operation is solely focused on loft conversions and extensions you can be sure that here at SMA the entire team are not only highly skilled but are also very experienced in all aspects of loft conversions and extensions on all types of properties from the initial design stage through to Local Authority approval.

We trust you will take the time to browse the site and would hope that you will be assured of the comprehensive and thorough way we approach all projects from the outset.

If you would like any more information or you have any questions please contact us or Free call 0800 068 4606 during normal business hours.

Loft Conversions Specialists
Trading Continuously Since 1996
Fixed Price Quote – No Surprises
We offer fixed price quotes so there are no hidden surprises
All Works Fully Insured
Fully Comprehensive 10 Year Guarantee
Fully Qualified Expert Builders
All our builders are carefully selected to ensure your project is in safe and experienced hands
Expert Advice and Planning
Initial Consultation

Your initial enquiry will be passed to one of our Designers who will contact you to arrange a convenient time to discuss your project requirements in detail, how you would like to use the space created and any design features that may be important to you.


Once contracts have been signed, a measured survey will be carried out and full working drawings/plans will be produced. After your approval (with any amendments if applicable) they will be submitted formal planning permission.

Project Building

Once all plans have been approved we will advise you of the estimate build time as Project timescales can vary due to the size and specification detailed. All our builds area carried out by our permanent non-sub contracted teams to ensure continuity of quality control.

What Our Clients Say
Mr Roger Sillence

We are extremely pleased with all aspects of the work, from the planning to the final decorating. I strongly recommend using SMA lofts if you’re thinking of a loft conversion.

Mr John Holliday

Excellent, very professional.

Mrs Hannah Stringer

All tradesmen were courteous and completed their work to a high standard. We are really pleased with the result. It was completed with minimal fuss or disruption to us. I would definitely recommend SMA.

Mrs Tilbury

We highly recommend SMA Lofts. From the initial quote to project sign off, the service we received was brilliant. Builders, electricians, tilers, plumbers, plasterer, carpenter, roofer were all very professional, knew what needed to be done and got on with it. They were also really friendly and helpful. It was a well-oiled machine. The finished loft bedroom and en-suite bathroom look amazing. To say it was a big job, it was very hassle/stress free for us. Thanks SMA Loft!

Mr Sam Austin

The SMA team were excellent. They were prompt, tidy and brilliant at keeping us in the loop/ updated with what was going on. The team completed the work on schedule, to a high standard and to the design/ spec we agreed. They were also able to flex their delivery dates to get the work done before the birth of our daughter. I would highly recommend them.

Mr Anthony Brampton

A highly professional job from start to finish.

Mr Jeffrey Musgrave

I cannot speak highly enough about the quality of work SMA did. Everyone, the builder, plumber, electrician, plasterer, carpenter, sales, Sam and office staff were totally professional in everything they did. We were given advice and options throughout the process and gave us ideas about things that we had not even thought of. The builder explained things as the build progressed. The quality of the plasterer made decorating easy. The electricians asked and advised about positioning lights and sockets. The carpentry and plumbing was fantastic quality. I would highly recommend this company.

Ms Katy Sawyer

Excellent work by really knowledgeable and trustworthy workmen. They also went out of their way to ensure relations with the neighbours were good throughout the build. The entire team were exceptionally determined to get the work done quickly and in time for my baby to arrive – which they did, and maintained a really high-standard of craftsmanship throughout. It must be a rarity in the industry: it was finished early and under-budget. We love our loft conversion and would recommend SMA Lofts to anyone.

Mr Iain Reilly

All in all an excellent experience. From initial consultation through to final walk around we were well looked after by all the SMA team. They really understood the specifics of the loft build and often offered advice to help ensure that we were really getting what was required, not just what would have been the simplest outcome for them. I would not hesitate to recommend SMA to anyone looks for a loft conversion in London, you won’t be disappointed.

Dr Louise Allnutt

SMA are a very organised and reliable firm. The finish of the loft is exceptional and we are very happy. The main benefit of hiring SMA is their ability to trouble shoot and resolve issues within a very short time frame. We really recommend SMA.

Mrs Hooftnan

Very happy with the work and the communication with the company. All very clear and no unexpected additional charges. Efficient and approachable.

Mr & Mrs Beckett
Brentford TW8

We’d like to thank you all at SMA for the successful completion of our project, on time and to budget. All you associates were courteous and polite and the work was finished to a good standard.

Jean-Luc Eberlin
London NW6

The loft conversion was done to a very high standard and I am delighted with the end result.

Paul Dixon
London W10

We are very pleased with the final result. Everyone who worked on site were very helpful and professional. Very happy with all of them.

Will Hurst
London W7

The conversion went extremely well. It was done incredibly fast we thought with less disruption than we imagined. The final result is truly superb and lots of people have commented on what a good conversion it is.

Colin Dolphin
Northfields W13

Thanks to you and all the gang for a job well done.

Bowden & Ms Cooner
Chiswick W4

Thank you very much for your teams hard work, the loft is great and we are very happy with the outcome. Sam was excellent and we would be happy to act as any reference for your customers.

Howard Jones
London N4

We were delighted with the Dorma SMA built for us. The work was completed within the specified time frame and the price quoted at the start was the price we paid at completion. The work was carried out with an absolute minimum of disruption and to an extremely high standard.

Annabel Askham
Teddington TW11

We are really delighted with our new loft and shower room and the experience was so much better than we anticipated! All your team without exception, are extremely hard working and thoroughly professional.

Mr Mark W
Hampstead NW6

It went well, and I’m very pleased with the result. We had discussed at the beginning of you quoting for the works downstairs (e.g. the new kitchen), we didn’t really follow up on it. In hindsight it would have been great to have had a single contractor for all the work. Emmet and Phil were superb. It was very good, I would highly recommend SMA.


We are members of and proud to be certified by the following industry standards which ensure you are in safe and experienced hands. 


If you would like to discuss any of our services call us or submit your enquiry using the form and one of our team will get back to you as quickly as possible.

84 Westfield Rd
West Ealing W13 9JA

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