Please see what our clients think about us and about services we provide:

“Kris has worked under my supervision and carried out safety inspections, boiler breakdown and associated works. His attitude to work was impeccable and this was also matched by his knowledge of the whole range of appliances he worked on. His rate of first time fix rate was 98%”.

Gas Contracts Manager at MITIE Property Services 


“I am delighted to recommend to you the plumbing services of Mr. Koscielniak.  We have used him exclusively for several years, for both domestic works in our large Victorian house in London and at my husband’s business premises. He has always worked to the highest standards of efficiency, tidiness and time, while at the same time working within agreed budgets. His work has involved complete installation of boilers and associated plumbing; fitting bathrooms and utility rooms and other small running repairs and problem solving. Our confidence has been such that we have been happy to give him our house keys and know that he will do whatever is in our best interests. We have had no hesitation in recommending his services to neighbours and colleagues.

Patricia – Streatham, Lewin Road


I am happy to write this reference for K&K SMART TECH whom I have employed and known for five years.  I had excellent references from neighbours for whom he had done very good work.  I, too, have recommended him to friends whom I know were grateful to have such a skilled and reliable workman. The work K&K has done for me has been in my home and includes:  installation of a boiler and its annual servicing, installation of radiators, change of radiators, detecting and remedying a leak from a shower, other minor work including plumbing for a dishwasher, fixing dripping shower head and taps. I felt comfortable to leave the engineer in my house whilst I went out as like my neighbours I knew him to be completely trustworthy. Apart from his knowledge and skills his characteristics are: Punctuality, reliability, his fair pricing of his work, his courtesy, his speed in working  and high standards of workmanship.

Catherine – Streatham


I have known Kristof Koscielniak for about 5 Years. He was referred from a neighbour who is very involved with building and who is a hard task-master and a perfectionist, so I had no doubts about accepting his recommendation. Kris has been servicing my central heating, solving any problems with my quirky system and installed a new boiler and pump – I now have a system that works better than ever! Kris has always proved to be reliable and thorough in his work with a very pleasant personality. If there has ever been any tweaking to do he has come without delay and made adjustments as required. I feel he is very reasonable and fair and seems concerned to keep his clients happy.