The following books and publications make useful reading;
Tree Root Damage to Buildings by Biddle P.G (Willowmead Publishing 1998, Oxford ISBN 095330860X)
The Influence of Trees on House Foundations on Clay Soils (Building Research Establishment Digest 298)
Tree Roots and Buildings by Cutler, D F and Richardson, I B K (Longman Scientific and Technical 1989, ISBN 0582034108)
Precautions to Take When Building Near Trees (The National Housebuilders Standards 1992)
Has Your House Got Cracks? by Freeman, Littlejohn & Driscoll (Thomas Telford Ltd. 1994, ISBN 0727719963)
Some of these books are made available through the RHS Lindley Library.