Our stabilized portfolio of operating properties was comprised of the following office properties at September 30, 2013:



	Number of Buildings	Rentable Square Feet	Number of Tenants	Percentage Occupied
Stabilized Office Properties ⁽¹⁾	103	12,536,495	654	92.2	%

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(1)	Excludes 13 properties located in San Diego, California and one property in Anaheim, California that were held for sale at September 30, 2013 (see Note 12 “Discontinued Operations”).

Our stabilized portfolio includes all of our properties with the exception of properties held for sale, undeveloped land, development and redevelopment properties currently under construction or committed for construction, and “lease-up” properties. As of September 30, 2013, our stabilized portfolio of operating properties excluded the 14 properties that were classified as held for sale as of that date. (See Note 12 for additional information). We define redevelopment properties as those projects for which we expect to spend significant development and construction costs on existing or acquired buildings pursuant to a formal plan, the intended result of which is a higher economic return on the property. We define “lease-up” properties as properties we recently developed or redeveloped that have not yet reached 95% occupancy and are within one year following cessation of major construction activities. As of September 30, 2013, the following properties were excluded from our stabilized portfolio:



	Number of Properties	Estimated Rentable Square Feet
Properties Held for Sale ⁽¹⁾	14	1,159,185
Development properties under construction ⁽²⁾	5	1,516,000
Lease-up properties	2	508,000

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(1)	Includes 13 properties located in San Diego, California and one property in Anaheim, California (see Note 12).

(2) Estimated rentable square feet upon completion.