Leasing new space can be a stressful and expensive endeavor for any tenant; particularly the initial buildout phase. To ensure that a tenant will be able to build out its space in a timely fashion and in the manner it desires, there are a number of issues which should be addressed in the lease. This article will discuss tenant considerations when negotiating a lease, so as to avoid pitfalls related to landlord constraints on alterations that may: (i) result in delays; (ii) cost overruns; (iii) prevent tenant from constructing what it desires; and/or (iv) at worst causing the space to be non-functional for tenant’s intended business.