Our customers do not have to worry. They have found the best partner who is always there.

About the company

Our team

The team is composed of talented professionals, as demonstrated by our experience and references. We are oriented to the end result desired by the customers. Our clients do not need incomplete solutions.

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We have the experience of a team that is to be proud of. Our customers are satisfied, and their expectations have been met. We are there for them also in the future.

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The company deals with construction and design of utility systems of buildings, and the related support services. The background of the core team is strongly associated with the field of particular works of AS Skanska, who has exited the Estonian market. From there, we have derived our essential values: occupational safety, integrity, quality. So it is possible in the long term to solve the customer’s complex projects professionally.



The successful partnership of Maru Ehitus with 1Kelvin
began on the renovation of the Tallinn post office building.
Successful completion of this complex work with a busy schedule
was followed by a number of new cooperation projects.
I dare to recommend 1Kelvin if a reliable and professional partner is sought.

AS Maru Ehitus
Chairman of the Management Board


A capable and professional co-operation partner with a flexible approach!

NCC Ehituse AS
Chairman of the Management Board


On the basis of the experience of Skanska, I can say that
in the team of 1Kelvin are working skilled professionals
who may be entrusted with the design and
construction of the particular parts of complex objects.

Skanska AS
Chairman of the Management Board

History of Kelvin

December 2016
Annual sales of over 8.5 million euro achieved
January 2016
Business relocation to the new office, Männiku tee 104
December 2015
Annual sales of over 4.5 million euro achieved
August 2014
The first public procurement won
July 2014
The first construction project outside Estonia
June 2014
Extension of the circle of owners on the basis of the key employees of the company
January 2014
A new level of design. Investments in the field of energy efficiency and model design. Energy simulations and feasibility calculations
December 2013
Annual sales of over 2.5 million euro achieved
March 2013
The first completed construction project
December 2012
Annual sales of over 1.5 million euro achieved
September 2012
The first contracts for construction sites
September 2012
Creation of the brigades of workers and the tool park and adjustment of the operating system
September 2012
As a result of the closure of the field of specialized works of Skanska AS, 8 employees join the company. The primary focus moves to HVAC construction
January 2010
Creation of OÜ 1Kelvin. The operation begins in the field of energy efficiency in buildings and HVAC