From the first site visit, Kosta was honest and detailed, suggesting clever tweaks that improved the layout without raising the budget. The crew arrived on time, kept everything tidy, and finished two weeks early. Workmanship is first-class: brickwork blends perfectly, glazing is flawless, and the new open-plan space feels like it was always there.

Rear and side extension · Croydon · May 2025

Kosta and his team completely refurbished our house. Made downstairs open plan, new kitchen, bathroom, plastering, tiling, electrics and plumbing. Kosta is so knowledgeable and has amazing ideas without increasing costs and is on site daily. His team are all outstanding at their work and very respectful and pleasant to have around.

House refurbishment · South Croydon · January 2026

Kosta listened to what we wanted, helped us choose tasteful tiles and fixtures, and kept us informed of progress every evening. Tiling is perfectly aligned, the walk-in shower feels like a hotel spa, and water pressure is excellent. The quote was clear and they finished three days ahead of schedule.

Bathroom refurbishment · Bromley · June 2025

Kosta guided us through slab patterns and edging options and even mocked up a sample so we could see it in daylight. The crew lifted the old concrete, set new drainage, and laid the paving with perfect joints. They left the drive spotless each evening. Neighbours have already asked for their number.

Front patio · South Croydon · June 2025

They were punctual, stayed within the agreed timeframe, and their pricing was very reasonable. The additional space has been a game-changer for our home, and we've received a lot of compliments on the quality of the work. I've passed their name on to friends and family.

Loft conversion · Bromley · September 2024

We've used Kosta and his team several times now. His attention to detail and professionalism is outstanding. Nothing is ever too much trouble. Always courteous, super-friendly and conscientious. Jobs are always competitively priced.

Loft conversion · Coulsdon · April 2024

I am a young woman who recently bought her own home and had no idea about building. Kosta came the next day after I called him and put me in touch with previous clients so I could get an idea of what I wanted. He was the most competitive in price and has over 20 years of experience. I cannot be more happy that Kosta and his team were my builders.

First home refurbishment · Bromley · July 2023

I have a disabled son and this company looked after everything we did for him in the side extension and let him enjoy his time in the new space. They were very well priced and were kind and excellent people. You will be looked after very well.

Side extension · West Wickham · May 2024

At every stage of the work he explained what needed to be done and where he was up to in the process. He always responded to our phone calls and when we encountered unexpected problems, he explained everything really clearly. We took his advice on some of our decisions as we trusted his experience.

Garage conversion · South Croydon · January 2023

When the shed panels arrived, the fitters claimed our concrete base was the wrong size or not square. I called Kosta and he arrived in less than ten minutes, remeasured everything and proved that his base was perfect, almost to the millimetre. The shed company had to admit their error. Highly recommended, accurate work.

Garden base and groundworks · South Croydon · June 2022

Kosta carried out the underpinning to the corner of our church building. He and his team worked efficiently and to a great standard with minimal disruption to normal activities. The repairs to the damaged walls were done with expertise to match the original. His quote was very competitive and he kept costs in line with it.

Underpinning · Sanderstead United Reformed Church

I am an architect and have dealt with this company for four years. They have impressed me with the quality of work they have provided on every job they have done for me. I can sincerely recommend this company to others for their quality and professionalism.

Structural steelwork · Architect's review

Kosta and Sons did a great job in our new restaurant: painting, decorating, plastering, bathroom installation, tiling and repairs. They were always on time and never left without cleaning and tidying up, and were extremely polite with us and the neighbours. The job is done to a high standard. It looks amazing!

Restaurant refurbishment · London

Not the first time I have used Kosta and it won't be the last. Simply the best building company I have used in 20 years. Despite problems with damaged deliveries, Kosta took everything in his stride and worked around every delay. They always show up, always do a full day, and deliver a great final result.

Full bathroom refurbishment · South Croydon · August 2022