YIT CORPORATION       STOCK EXCHANGE RELEASE    JUNE 23, 2010 AT 9:45 A.M.     



YIT ACQUIRES CAVERION, A CENTRAL EUROPEAN COMPANY OFFERING TECHNICAL
BUILDING   
SYSTEM SERVICES                                                   
             

YIT Corporation has agreed with the owners of Caverion GmbH
that YIT will       
acquire the entire business of Caverion. The price of
Caverion's shares is EUR  
73 million. The completion of the transaction is
subject to approval by the     
competition authorities. It is estimated that
the acquisition will be completed 
by August 31, 2010.                        
                                    

Caverion provides a wide range of
services related to technical building systems
and their maintenance and
operation. Its turnover in 2009 was EUR 440 million of
which 80 per cent was
gained from Germany. Other countries where the company    
operates are the
Czech Republic, Hungary and Poland. The company has project    
activities in
other countries. Caverion has 1,900 employees.                    

The
revenue of YIT's Building and Industrial services in 2009 was EUR 2,125    

million, of which EUR 375 million was from Central Europe (Germany, Austria, 
  
Poland, the Czech Republic, Hungary and Romania). YIT's personnel in
Central    
Europe is 2,060. Germany accounted for 53 per cent of YIT's
revenue in Central  
Europe in 2009.                                          
                      

YIT doubles its operations in Central Europe         
                          

The acquisition of Caverion is part of YIT's
strategy to increase its building  
system operations in Central Europe. It
will strengthen YIT's local market      
position in the Central European
countries where YIT already has operations. YIT
will merge the companies in
each country, which will improve YIT's ability to   
serve its customers
locally with a wide portfolio of services.                  

As a result of
the acquisition, YIT will become the second largest provider of  
building
system services in Germany. The bigger size of German operations
offers
opportunities to improve efficiency and profitability.                 
        

- Our aim is to develop our operations in Central Europe and become
the market  
leader in Germany. The know-how of personnel transferring to YIT
and our current
personnel will complement each other in an excellent way. We
target for         
profitable growth and increase the share of service and
maintenance operations, 
says Arne Malonæs, President of YIT's Building and
Industrial Services segment. 

Outlook for 2010 unchanged                    
                                 

The acquisition will not change YIT
Group's outlook for 2010. In its Interim    
Report of April 29, 2010, YIT
estimated that in 2010 the Group's revenue will   
increase and profit before
taxes will increase significantly compared to 2009.  


YIT Corporation     
                                                           

Virva Salmivaara
                                                               
Senior Vice
President, Corporate Communications                                 


For
further information, please contact:                                       

Arne Malonæs, President of Building and Industrial Services segment, tel. +47
90
69 31 86, arne.malonas@yit.no                                              
    
Sakari Toikkanen, Senior Vice President, Business Development, tel. +358
40 532 
2174, sakari.toikkanen@yit.fi                                         
         
Hanna-Maria Heikkinen, Vice President, Investor Relations, tel. +358
40 826     
2172, hanna-maria.heikkinen@yit.fi                                
             


YIT is a leading European service company in building
systems, construction     
services and services for industry. We build,
develop and maintain quality      
living environments in the Nordic
countries, Russia, the Baltic countries and   
Central Europe. In 2009, YIT's
turnover was EUR 3.5 billion. The Group has      
23,500 employees. YIT's
shares are listed on NASDAQ OMX Helsinki. YIT's largest 
business segment is
Building and Industrial Services, which provides services in
all countries
where YIT operates. In 2009, the segment's revenue was EUR 2,125  
million and
it employed 17,560 people. More information: www.yitgroup.com      


Caverion provides a wide range of services relating to technical building  
    
systems and their maintenance and operation in Germany, the Czech
Republic,     
Hungary and Poland. It also has project activities in other
countries. The      
company's turnover in 2009 was EUR 440 million and it
employed 1,900 people.    
Caverion provides services for all building
technical systems. Additionally, it 
manufactures ventilation and heating
systems. Caverion's clients come from the  
automotive, microelectronics, food
and pharmaceutical industry as well as bank  
and insurance sectors. More
information: www.caverion.com