David Hanrahan is an equity partner and co-founder of H2SO.

A former partner at King Sturge, he has been active in the West End office market for 22 years providing leasing, development and investment advice. For 15 years he ran his own niche practice and has a particular specialism in the development process with a track record of acquiring prime West End sites for clients and giving development consultancy and leasing advice.

He has also worked with clients on investment purchases and sales including the £105.5m acquisition of a headquarters for PA Consultants in Buckingham Palace Road, SW1. In 2005 he was involved in the £146m purchase of 33 Grosvenor Place, SW1 and its sale the following year for £208m. He has advised a wide range of clients from the private, public and institutional sectors including, most recently, Invista, WELPUT, Arlington, Morley and Legal & General.

Other notable projects that David has worked on include:

• Providing development / leasing advice on the refurbishment of a 90,000 sq ft office building at 101 New Cavendish Street, W1 for City Offices.
• Providing advice to Capital & Counties plc on the existing and potential office content at Earls Court and Olympia.  This culminated in their purchase of a 50% stake in the owning company.  Retained subsequently to advise on the office content of a potential 70 acre site.
• Advising Stow Securities and Grosvenor on their development proposals for 29-35 Davies Street, London W1.  A 40,000 sq ft office development opportunity.
• Advising The Royal British Legion on their relocation from Haig House, Pall Mall, SW1 to Southwark.   This involved disposing their freehold interest on Pall Mall.

Other notable projects that David has worked on include:

• Advising the Freeholder of Arundel Great Court, Strand, WC2, on re-gearing negotiations with the leaseholder, where a 1,000,000 sq ft scheme was proposed.
• Acquisition of a redevelopment site at the corner of Bond Street and Oxford Street for Development Securities Plc.  Advising on funding terms with a German Fund and then retained on the letting of the office element of 45,000 sq ft.
• Advising Redevco on a 40,000 sq ft office and residential refurbishment at 1-4 Connaught Place, W2.