Mr Clare, who was previously Chief Executive of Barratt Developments, will take up his new role on 13 February after succeeding Margaret Ford, who is stepping down from the company.
He is currently Senior Independent Director of both United Utilities Group and Ladbrokes Coral Group, as well as a Non-Executive Director of Premier Marinas Holdings.
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Before joining Barratt, Mr Clare held a number of senior roles at Centrica and British Gas, as well as acting as a non-executive director of airports operator BAA.
Margaret Ford said: "We set very challenging requirements for Grainger's new Chairman and are very pleased that Mark Clare meets all of our criteria. Mark is an enormously experienced and respected business leader with a strong record in the residential sector."
In addition, Grainger has revealed Justin Read will join the Board as a non-executive director on the same date.
Baroness Ford added: "Justin Read has enjoyed a distinguished career in the property sector embracing considerable real estate experience both within the UK and internationally. He is well known within the industry and we are delighted to welcome him to the Grainger Board."
(LM)
