Endorsed by Which?

FM Building Ltd

4.6

10 Reviews

Opening Hours
Today - 07:00–17:00
  • Monday 07:00–17:00
  • Tuesday 07:00–17:00
  • Wednesday 07:00–17:00
  • Thursday 07:00–17:00
  • Friday 07:00–17:00
  • Saturday 07:00–17:00
  • Sunday - Closed

About

About FM Building Ltd, London, NW3 1RX

FM Building Ltd is a residential building company based in Harrow, offering premium building services to London and the surrounding areas.

At FM Building Ltd our aim is to create beautiful spaces for our clients to enjoy for years to come. We work closely with clients, architect and interior designers to give them a bespoke space which works for them and their lifestyle, and which is sympathetic to the surroundings of their existing property or location.
We look forward to working with you

We offer a full range of building services, from major rebuilds to smaller jobs such as masonry repairs, including:

New Builds
Alterations, Extensions & Conversions
Brickwork
Concrete
Plastering & Screeding
Tiling
Painting & Decorating
Kitchens & Bathrooms
Roofing Services
Re-pointing
Septic Tanks
Excavation Services
Soakaways
Foundations
External Works
Drainage

What we do

  • Builders

    • Building services
    • Conservatories
    • Extensions
    • Garage conversions
    • Loft conversions
    • Plastering
    • Porches
  • Kitchen fitters

    • Kitchen design
    • Kitchen installation
    • Kitchen refurbishment
    • Kitchen tiling
    • Kitchen worktops
  • Bathroom fitters

    • Accessible bathrooms and showers
    • Bathroom design services
    • Bathroom Installation
    • Bathroom refurbishment
    • Bathroom tiling
    • Electric Showers
    • Wet rooms
  • Painters and decorators

    • Exterior decorating
    • Interior decorating
    • Wallpapering

Customer reviews

Why you can trust these reviews

All reviews are verified as being genuine and a true customer of this trader.

How can we be so sure?

100% of the reviews we publish have been through our stringent moderation process.

4.6
10 reviews
Customer Service
4.6
Quality
4.6
Value
4.6
Sort by
Terrible experience, do not recommend
Customer Service
Quality
Value
While we are happy with the final look of most of the balcony, working with Marius was a nightmare. What should have been a two-week job dragged on for three months, cost us way more the original budget for added costs that should have been included to begin with, and left us with major issues still unresolved — including a defective window, cabinets, and furniture doors that don’t stay closed. Our new window was left unusable during a heatwave, and Marius even told us he “didn’t know the window needed a handle” so it had to be nailed shut- and he then charged us £150 to install a simple hook. We are having to get a new window installed for his negligence and he is refusing to give a proper refund. He also charged for things never done, like a window fastener, and billed £200 just to install lights we had already purchased. The furniture he built was not of the quality we expected: the finishes are rough, doors don’t shut properly, and what was meant to be a waterproof cabinet doesn’t close at all. His team was unprofessional — loud, watching YouTube videos without headphones while we worked from home, leaving cigarette butts around, and leaving our flat in a mess we repeatedly had to clean, including a filthy bathroom. We had to fight every step of the way, pay far more than quoted, and are still left with defective work that now needs to be fixed by someone else. While parts of the work turned out fine, the process was stressful, expensive, and deeply unprofessional.
Customer in Greater London Posted on 26/09/2025 , work completed 25/09/2025
The trader replied (on 29/09/2025)
Hi, Thank you for sharing your feedback. I am truly sorry that your experience fell short of expectations. We strive for high-quality workmanship and professional service, and it’s clear we did not meet those standards for you. I especially apologise for the inconsiderate conduct of some team members—there is no excuse for noise, untidiness or lack of courtesy. I have raised this at our toolbox talks to ensure it is not repeated. I also appreciate how disruptive building work can be, particularly in a flat where you were working from home. Regarding costs and timing: we provided a detailed fixed quote which was accepted in writing and all agreed items were charged at the quoted rate. The increase in total cost arose from additional works you requested, for which two Cost Variation documents were issued and approved. Delays also occurred because several materials were client-purchased and either late or needed replacement (decking deliveries, faulty lights, decision on the exterior cabinet lock). On the window, FM Building had no role in its supply or installation; this was arranged by your designer. When it arrived without handles you asked us to fit hardware you supplied, and a variation with labour cost was agreed. Labour was also charged for installing client-supplied lights, which is standard practice. I’m saddened to learn of your disappointment and remain willing to revisit the site to address any reasonable defects. I hope we can work toward a fair resolution.
Kitchen renovation
Customer Service
Quality
Value
We are very happy with the work of Marius and his team for our kitchen renovation. This involved removing the existing kitchen, putting up a new stud wall, wallpapering, painting, electrical and plumbing works, as well as fitting bespoke cabinets. I was happy with the quote provided and found everyone to be professional and polite. Communication was excellent and, most importantly, the end result was excellent. Would definitely use this company again.
Customer in Greater London Posted on 23/12/2023 , work completed 14/12/2023
Tiling and fixing leak.
Customer Service
Quality
Value
Excellent work. Repaired leak. New bathroom tiling and new tiling around the fireplace. Fixed ceiling from the leak. Highly recommended.
Customer in Greater London Posted on 25/02/2023 , work completed 23/02/2023
Endorsement Reference
Customer Service
Quality
Value
I have been using this trader for 6 or 7 years, and they are excellent and very knowledgeable. The last job was painting & decorating, and they did a great job.
Which? Trusted Traders Consumer Posted on 22/12/2022 , work completed 05/08/2022
Endorsement Reference
Customer Service
Quality
Value
Kitchen - Rangemaster O ring replacement Utility - O ring on Rangemaster tap Ensuite - Shower tray Dowsil Jasmine silicone and clear silicone Floor tiles grouted Marius, F&M Building has carried out numerous jobs over the course of a number of years including carpentry, painting & decorating, electrical testing and new lights installation, and plumbing. His work is always at a high standard of workmanship, he is punctual, tidy and always very professional. I would have no hesitation in recommending him, and will continue to employ him for all my maintenance and repair work.
Which? Trusted Traders Consumer Posted on 22/12/2022 , work completed 05/11/2022
Endorsement Reference
Customer Service
Quality
Value
They have done work on the interior of my flat, fixing holes in the wall, redecorating, adding shelves, bathroom fittings, and much more all too an incredibly high standard. They have also done exterior work, refitting and painting the dormers on the fourth story and installing new guttering to help reduce damage to the property. Both works were done to a high standard, the team were tidy throughout, they caused minimal disruption and always did their best on any request. Really appreciated the thorough work, and the high quality finish.
Which? Trusted Traders Consumer Posted on 22/12/2022 , work completed 28/10/2022
Endorsement Reference
Customer Service
Quality
Value
Fm Building team are very professional, detailed and thorough with their work. They completed our job on time, and ensured to tidy at the end. I will definitely be using them again!
Which? Trusted Traders Consumer Posted on 22/12/2022 , work completed 01/12/2022
Endorsement Reference
Customer Service
Quality
Value
Bathroom vinyl flooring new sinks taps
Which? Trusted Traders Consumer Posted on 22/12/2022 , work completed 28/11/2022
Endorsement Reference
Customer Service
Quality
Value
Excellent experience with Marius. His team worked very hard and we were very happy with the high quality finish he produced. Work included: Plastering, painting and decorating. Removal of existing kitchen and installation of new kitchen including worktops, splashback and appliances. Removal of existing bathrooms and installation of new bathrooms including all tiling. Carried out electrical work including replacement of ceiling lights, installation of spotlights and addition of new sockets and switches. Carried out carpentry work which included building under stairs storage and a storage cupboard. Installation of laminate flooring.
Which? Trusted Traders Consumer Posted on 22/12/2022 , work completed 05/12/2019
Endorsement Reference
Customer Service
Quality
Value
Our had our floor stripped out and replaced with parquet flooring as part of remedial damp works. We also had a bathroom retiled, old fitted furniture stripped out and replaced with new furniture, painting and finishing throughout. The team were great, helped with advice about installation of new fitted furniture and finished everything on time despite numerous delays with suppliers.
Which? Trusted Traders Consumer Posted on 22/12/2022 , work completed 31/05/2022