2006 Canadian Tax Information

Builders has determined that for Canadian unitholders, 93.36% of the 2006 distributions declared should be treated as income and 6.64% should be treated as a return of capital.

Builders qualifies as a mutual fund trust under the Income Tax Act (Canada) and therefore Canadian unitholders holding their Builders units in a Registered Retirement Savings Plan, Registered Retirement Income Fund, Registered Education Savings Plan or a Deferred Profit Savings Plan should not report any income related to distributions on their 2006 income tax return.

Unitholders holding their units outside such plans should receive a T3 Supplementary Information slip (“T3”), postmarked on or before March 31, 2007. Builders’ Canadian registered unitholders should receive their T3 from Computershare, Builders’ transfer agent. Unitholders that hold their units through a broker or other intermediary should receive a T3 directly from their broker or intermediary.

This information is only applicable to Canadian resident unitholders. All non-resident unitholders should contact their tax advisors with respect to the tax implications of holding trust units, including any associated filing requirements, in jurisdictions outside of Canada.

This information is intended to provide general guidance only to assist in 2006 income tax reporting for Canadian resident unitholders of Builders’ trust units. It is not intended to be legal or tax advice to any particular unitholder. Unitholders or potential unitholders should consult their own legal or tax advisors with respect to their particular circumstances.