homepage slider

  • Exceeding our Clients Expectations

  • Prioritising Health and Safety

  • Quality and Excellence for over 200 years

  • Value Efficiency and Innovation

  • Skills and Craftmanship at our core

Top 10 Construction Company

Commenting on the company’s listing at No. 10 as noted in the table of the Top Irish Contractors in the Linesight 2017 Handbook, Managing Director Tommy Drumm attributed the company’s success to its ability to satisfy client requirements and achieve the highest standards.

“Completing projects within programme, meeting budget constraints and providing a quality service, ensures the company is succeeding in forging strong relationships with its clients. Our Clients are reassured by the high level of service provided by Collen staff both onsite and behind the scenes”.

Collen seeks new Supply Chain Partners across Europe

As a result of the Company’s continued expansion in mainland Europe, Collen GmbH is currently seeking new supply partners to strengthen our existing supply chain in Europe.

We are interested in hearing from new, innovative partners to enhance our operations throughout Europe. If you are a company focused on building long-lasting partnerships through delivery of high quality products and services, then we would like to hear from you.

Please register your interest with us via email to construction@collen.com and one of our account managers will be in touch with you shortly.

200 Years of Building Excellence

Collen Construction is a family owned business established in Ireland in 1810 with a strong reputation for building quality and excellence. The company has successfully tendered and negotiated projects for a range of clients including large multi-national corporations, private companies, local authorities and state authorities, and has established a reputation for providing complex projects on time and within budget. 

We are currently ranked in the top ten Main Building Contractors in Ireland, with experience in private and public-sector projects as design and build contractor, management contractor and joint venture partner.  Our portfolio includes commercial office fit-outs, data centres, life sciences, industrial warehousing, retail, conservation and refurbishment projects, ranging in value from under €1 million up to €500 million.

Collen is renowned for building long-lasting relationships with Clients, Consultants and Supply Chain members. At the heart of these relationships is a common vision: to deliver projects efficiently, effectively and to the highest quality standards. In continuing to build upon relationships with existing Clients, Collen has expanded operations within mainland Europe, to deliver the same first-class standard of projects that the firm has delivered in Ireland. 

For more information click here

Collen GmbH

Our offices in Frankfurt, which were opened by Taoiseach Enda Kenny in 2016, give Collen GmbH a perfect base in Germany to offer full turn-key solutions for all data centre clients from Hyper Scale to Co-Lo. Collen GmbH have just completed an 18Mw Data Centre in Frankfurt and are currently looking at other potential projects in the same region. Since entering the data centre industry in 2010, Collen has built over 180,000m² of data halls to a value of €700 million and is Ireland’s leading contractor for data centres.

Collen GmbH is committed to offering high quality projects within difficult timescales. We understand that time to market for Data Centres is crucial and therefore will work very closely with Clients and supply chain partners to ensure that the timescales are met whilst also maintaining quality and costs.


Collen GmbH are recruiting. Click the link below to view our current career opportunities which are listed in English. Visit Careers

Check Out Our Latest News

Visit Our News 

Collen GmbH Officially Opens

An Taoiseach Enda Kenny officially opened our new Collen GmbH offices in Frankfurt Germany on Thursday April 6th. More Details

An Taoiseach Enda Kenny speaking at the event.

Joe Dillon (Senior Quantity Surveyor), Tom O’Connor (Director Collen GmbH and Collen AB), David Lee (Construction Director), An Taoiseach Enda Kenny, Kara Stuart (Company Secretary), Gerard Kelly (Engineer) and Julie Sinnamon (CEO Enterprise Ireland).

Tom O’Connor (European Operations Manager), David Lee (Construction Director), An Taoiseach Enda Kenny and Jack Collen (Site Engineer)

200 Years

Building Excellence