The time to begin the process depends on the market conditions and the size of your requirement. Typically, in a stabilized 90% occupied market, the best time to begin looking for 1,000-3,000 SF is 3-6 months before your lease expires; for 3,000-10,000 SF requirements, 6-12 months; and for requirements in excess of 10,000 SF, 12-18 months is the most effective time-frame. When tenants have time on their side, they are not at the mercy of landlords and are not considered by them to be a “captive market”. The best deals are struck far in advance of the target lease commencement date. Many corporate executives miss the proverbial boat – and all the potential incentives – because they have begun negotiations too late in the process and squandered their high ground. When landlords know that your timing is tight, they will frequently exploit this perceived weakness and capitalize on it by demanding their quoted terms, and become inflexible when negotiating the lease document.