ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion relates to our consolidated financial statements and should be read in conjunction with the financial statements and notes thereto appearing elsewhere in this report. The results of operations discussion is combined for the Company and the Operating Partnership because there are no material differences in the results of operations between the two reporting entities.
Forward-Looking Statements

Statements contained in this "Item 7: Management's Discussion and Analysis of Financial Condition and Results of Operations" that are not historical facts may be forward-looking statements, including statements or information concerning projected future occupancy and rental rates, lease expirations, debt maturity, potential investments, strategies such as capital recycling, development and redevelopment activity, projected construction costs, dispositions, future executive incentive compensation, pending, potential or proposed acquisitions and other forward-looking financial data, as well as the discussion in "-Factors That May Influence Future Results of Operations", "-Liquidity and Capital Resource of the Company", and "-Liquidity and Capital Resources of the Operating Partnership." Forward-looking statements can be identified by the use of words such as "believes," "expects," "projects," "may," "will," "should," "seeks," "approximately," "intends," "plans," "pro forma," "estimates" or "anticipates" and the negative of these words and phrases and similar expressions that do not relate to historical matters. Forward-looking statements are based on our current expectations, beliefs and assumptions, and are not guarantees of future performance. Forward-looking statements are inherently subject to uncertainties, risks, changes in circumstances, trends and factors that are difficult to predict, many of which are outside of our control. Accordingly, actual performance, results and events may vary materially from those indicated in the forward-looking statements, and you should not rely on the forward-looking statements as predictions of future performance, results or outcomes. Numerous factors could cause actual future events to differ materially from those indicated in forward-looking statements, including, among others:

• global market and general economic conditions and their effect on our liquidity and financial conditions and those of our tenants;

• adverse economic or real estate conditions in California and Washington including with respect to California's continuing budget deficits;

• risks associated with our investment in real estate assets, which are illiquid, and with trends in the real estate industry;

• defaults on or non-renewal of leases by tenants;

• any significant downturn in tenants' businesses;

• our ability to re-lease property at or above current market rates;

• costs to comply with government regulations, including environmental remediations;

• the availability of cash for distribution and debt service and exposure of risk of default under debt obligations;

• significant competition, which may decrease the occupancy and rental rates of properties;

• potential losses that may not be covered by insurance;

• the ability to successfully complete acquisitions and dispositions on announced terms;

• the ability to successfully operate acquired properties;

• the ability to successfully complete development and redevelopment properties on schedule and within budgeted amounts;

• defaults on leases for land on which some of our properties are located;

• adverse changes to, or implementations of, applicable laws, regulations or legislation;

• environmental uncertainties and risks related to natural disasters; and

• the Company's ability to maintain its status as a REIT.

The factors included in this report are not exhaustive and additional factors could adversely affect our business and financial performance. For a discussion of additional risk factors, see the factors included in this report under the caption "Risk Factors," and in our other filings with the SEC. All forward-looking statements are based on currently available information and speak only as of the date of this report. We assume no obligation to update any forward-looking statement that becomes untrue because of subsequent events, new information or otherwise, except to the extent we are required to do so in connection with our ongoing requirements under federal securities laws.

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Company Overview
We are a self-administered REIT active in office submarkets along the West Coast. We own, develop, acquire and manage real estate assets, consisting primarily of Class A properties in the coastal regions of Los Angeles, Orange County, San Diego County, the San Francisco Bay Area and greater Seattle, which we believe have strategic advantages and strong barriers to entry. We own our interests in all of our properties through the Operating Partnership and the Finance Partnership, and conduct substantially all of our operations through the Operating Partnership. We owned a 97.6% and 97.2% general partnership interest in the Operating Partnership as of December 31, 2012 and 2011, respectively. All our properties are held in fee except for the 11 office buildings which are held subject to long-term ground leases for the land (See Note 15 to our consolidated financial statements included in this report for additional information regarding our ground lease obligations). 2012 Highlights
We made significant progress on several fronts during 2012, and are well-positioned for continued long-term growth through our strong leasing performance, well timed acquisitions, development and redevelopment efforts, ongoing capital recycling program, and successful financing activities. Leasing - During 2012, we executed new and renewal office leases on 2.3 million square feet, our highest annual leasing performance since our formation in 1997. This leasing activity included a lease signed with salesforce.com for approximately 445,000 rentable square feet. As a result of our consistent and successful leasing efforts, occupancy in our stabilized office portfolio increased to 92.8% as of December 31, 2012, up from 90.1% as of December 31, 2011.
Operating Property Acquisitions - We remain a disciplined buyer of office properties and continue to focus on value add opportunities in West Coast markets populated by high growth tenants in a variety of industries, including technology, media, healthcare, entertainment and services. During 2012, we continued to expand our portfolio in the San Francisco Bay Area, greater Seattle, and Los Angeles through the acquisitions of eight buildings, four buildings and two buildings, in each respective region, for a total purchase price of approximately $674.0 million. As a result of the 2012 acquisitions, our stabilized portfolio has increased by approximately 1.8 million rentable square feet (see Note 3 to our consolidated financial statements included in this report for additional information).
Development Site Acquisitions - During 2012, we increased our focus on value-add and highly accretive development opportunities and expanded our future development pipeline through targeted acquisitions of development opportunities on the West Coast.
We further expanded our presence in the San Francisco Bay Area and Los Angeles through the purchase of six ground-up development opportunities, five of which are located in the San Francisco Bay Area and one that is located in the Hollywood submarket of Los Angeles. We commenced construction on four of the development opportunities located in the San Francisco Bay Area upon acquisition and expect construction to be completed at various dates beginning in late 2013 through late 2015. The remaining two development opportunities located in San Francisco and Hollywood have been added to our future development pipeline and we expect to begin construction during the first and fourth quarter of 2013 (see "-Factors that May Influence Future Operations - In-Process and Future Development Pipeline" for additional information). The total purchase price of these acquisitions was approximately $340.3 million.
Redevelopment - During 2012, we completed two of our redevelopment projects and added these projects to our stabilized portfolio. We completed both projects at a total estimated investment of approximately $97.8 million, including the $31.3 million net carrying value of the projects at the commencement of redevelopment. The total estimated investment includes lease commissions and excludes tenant improvement overages. The aggregate rentable square feet of these projects is approximately 410,000 square feet. As of December 31, 2012, these properties were 100% leased. In addition, we continued the redevelopment of one of our properties which will have a total estimated investment of approximately $180.0 million at completion. We also had one redevelopment project in lease-up with a total estimated investment of approximately $19.5 million at completion (see "-Factors that May Influence Future Operations - Redevelopment Projects" for additional information).
Capital Recycling Program - We have continued to utilized our capital recycling program to provide additional capital to fund potential acquisitions, to finance development and redevelopment expenditures, to potentially repay long-term debt and for other general corporate purposes. Our general strategy is to target the disposition of mature properties or those that have limited upside for us and redeploy some or all of the capital into acquisitions where we can add additional value to generate higher returns (see "-Factors that May Influence Future Operations" below for additional information).
In connection with our capital recycling strategy, during 2012, we completed the sale of seven office properties and our entire industrial portfolio, which was comprised of 39 industrial properties, with a combined 3,975,665 rentable square feet for a total gross sales price of approximately $500.3 million at a net gain of $259.2 million. The dispositions were structured to qualify as like-kind exchanges under Section 1031 of the Code ("Section 1031 Exchanges"). Financings - In addition to obtaining funding from our capital recycling program, we successfully completed a variety of financing and capital raising activities to fund our continued growth (see "- Liquidity and Capital Resources of the Operating Partnership" below for additional information).

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Critical Accounting Policies
The preparation of financial statements in conformity with GAAP requires us to make estimates, assumptions, and judgments that affect the reported amounts of assets, liabilities, and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses for the reporting periods.
Certain accounting policies are considered to be critical accounting policies. Critical accounting policies are those policies that require our management team to make significant estimates and/or assumptions about matters that are uncertain at the time the estimates and/or assumptions are made or where we are required to make significant judgments and assumptions with respect to the practical application of accounting principles in our business operations. Critical accounting policies are by definition those policies that are material to our financial statements and for which the impact of changes in estimates, assumptions, and judgments could have a material impact to our financial statements.
The following critical accounting policies discussion reflects what we believe are the most significant estimates, assumptions, and judgments used in the preparation of our consolidated financial statements. This discussion of our critical accounting policies is intended to supplement the description of our accounting policies in the footnotes to our consolidated financial statements and to provide additional insight into the information used by management when evaluating significant estimates, assumptions, and judgments. For further discussion of our significant accounting policies, see Note 2 to the consolidated financial statements included in this report.

Rental Revenue Recognition
Rental revenue is our principal source of revenue. The timing of when we commence rental revenue recognition depends largely on our conclusion as to whether we are or the tenant is the owner for accounting purposes of the tenant improvements at the leased property. When we conclude that we are the owner of tenant improvements for accounting purposes, we record the cost to construct the tenant improvements as an asset, and we commence rental revenue recognition when the tenant takes possession of or controls the finished space, which is typically when such tenant improvements are substantially complete. The determination of whether we are or the tenant is the owner of the tenant improvements for accounting purposes is subject to significant judgment. In making that determination, we consider numerous factors and perform a detailed evaluation of each individual lease. No one factor is determinative in reaching a conclusion. The factors we evaluate include but are not limited to the following:

• whether the lease agreement requires landlord approval of how the tenant improvement allowance is spent prior to installation of the tenant improvements;

• whether the lease agreement requires the tenant to provide evidence to the landlord supporting the cost and what the tenant improvement allowance was spent on prior to payment by the landlord for such tenant improvements;

• whether the tenant improvements are unique to the tenant or reusable by other tenants;

• whether the tenant is permitted to alter or remove the tenant improvements without the consent of the landlord or without compensating the landlord for any lost utility or diminution in fair value; and

• whether the ownership of the tenant improvements remains with the landlord or remains with the tenant at the end of the lease term.

In addition, we also record the cost of certain tenant improvements paid for or reimbursed by tenants when we conclude that we are the owner of such tenant improvements using the factors discussed above. For these tenant-funded tenant improvements, we record the amount funded or reimbursed by tenants as deferred revenue, which is amortized and recognized as rental revenue over the term of the related lease beginning upon substantial completion of the leased premises. During the years ended December 31, 2012, 2011, and 2010, we capitalized $24.0 million, $4.3 million, and $5.4 million, respectively, of tenant-funded tenant improvements. Leases at our development and redevelopment properties generally have higher tenant-funded tenant improvements and we expect the trend to continue to increase as our development and redevelopment activities increase. For those periods, we also recognized $9.1 million, $9.3 million, and $9.7 million, respectively, of noncash rental revenue related to the amortization of deferred revenue recorded in connection with tenant-funded tenant improvements. When we conclude that we are not the owner and the tenant is the owner of tenant improvements for accounting purposes, we record our contribution towards those improvements as a lease incentive, which is amortized as a reduction to rental revenue on a straight-line basis over the term of the related lease, and rental revenue recognition begins when the tenant takes possession of or controls the space.
Our determination as to whether we are or the tenant is the owner of tenant improvements for accounting purposes is made on a lease-by-lease basis and has a significant impact on the amount of noncash rental revenue that we record related to the

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amortization of deferred revenue for tenant-funded tenant improvements, and can also have a significant effect on the timing of our overall revenue recognition.

Tenant Reimbursement Revenue
Reimbursements from tenants consist of amounts due from tenants for common area maintenance, real estate taxes, and other recoverable costs, including capital expenditures. Calculating tenant reimbursement revenue requires an in-depth analysis of the complex terms of each underlying lease. Examples of judgments and estimates used when determining the amounts recoverable include:

• estimating the final expenses, net of accruals, that are recoverable;

• estimating the fixed and variable components of operating expenses for each building;

• conforming recoverable expense pools to those used in establishing the base year or base allowance for the applicable underlying lease; and

• concluding whether an expense or capital expenditure is recoverable pursuant to the terms of the underlying lease.

During the year, we accrue estimated tenant reimbursement revenue in the period in which the tenant reimbursable costs are incurred based on our best estimate of the amounts to be recovered. Throughout the year, we perform analyses to properly match tenant reimbursement revenue with reimbursable costs incurred to date. Additionally, during the fourth quarter of each year, we perform preliminary reconciliations and accrue additional tenant reimbursement revenue or refunds. Subsequent to year end, we perform final detailed reconciliations and analyses on a lease-by-lease basis and bill or refund each tenant for any cumulative annual adjustments in the first and second quarters of each year for the previous year's activity. Our historical experience for the years ended December 31, 2012, 2011, and 2010 has been that our final reconciliation and billing process resulted in final amounts that approximated the total annual tenant reimbursement revenues recognized.
Allowances for Uncollectible Current Tenant Receivables and Deferred Rent Receivables
Tenant receivables and deferred rent receivables are carried net of the allowances for uncollectible current tenant receivables and deferred rent receivables. Current tenant receivables consist primarily of amounts due for contractual lease payments and reimbursements of common area maintenance expenses, property taxes, and other costs recoverable from tenants. Deferred rent receivables represent the amount by which the cumulative straight-line rental revenue recorded to date exceeds cash rents billed to date under the lease agreement. As of December 31, 2012 and 2011, current receivables were carried net of an allowance for uncollectible amount of $2.6 million for each period and deferred rent receivables were carried net of an allowance for uncollectible accounts of $2.6 million and $3.4 million, respectively. Management's determination of the adequacy of the allowance for uncollectible current tenant receivables and the allowance for deferred rent receivables is performed using a methodology that incorporates a specific identification analysis and an aging analysis and includes an overall evaluation of our historical loss trends and the current economic and business environment. This determination requires significant judgment and estimates about matters that are uncertain at the time the estimates are made, including the creditworthiness of specific tenants, specific industry trends and conditions, and general economic trends and conditions. Since these factors are beyond our control, actual results can differ from our estimates, and such differences could be material. With respect to the allowance for uncollectible tenant receivables, the specific identification methodology analysis relies on factors such as the age and nature of the receivables, the payment history and financial condition of the tenant, our assessment of the tenant's ability to meet its lease obligations, and the status of negotiations of any disputes with the tenant. With respect to the allowance for deferred rent receivables, given the longer-term nature of these receivables, the specific identification methodology analysis evaluates each of our significant tenants and any tenants on our internal watchlist and relies on factors such as each tenant's financial condition and its ability to meet its lease obligations. We evaluate our reserve levels quarterly based on changes in the financial condition of tenants and our assessment of the tenant's ability to meet its lease obligations, overall economic conditions, and the current business environment.
For the years ended December 31, 2012, 2011, and 2010, we recorded a total provision for bad debts for both current tenant receivables and deferred rent receivables of approximately (0.0)%, 0.2%, and (0.4)%, respectively, of rental revenue. The negative provision for the year ended December 31, 2010 reflects the reversal of approximately $1.0 million of a provision for bad debts recorded in prior years against outstanding receivables from a former tenant due to the settlement of outstanding litigation with the former tenant in 2010. Excluding the $1.0 million reversal of the provision in 2010, our historical experience has been that actual write-offs of current tenant receivables and deferred rent receivables has approximated the provision for bad debts recorded for the years ended December 31, 2012, 2011, and 2010. In the event our estimates were not accurate and we had to change our

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allowances by 1% of recurring revenue, the potential impact to our net income available to common stockholders would be approximately $4.0 million, $3.6 million, and $3.0 million for the years ended December 31, 2012, 2011, and 2010, respectively.

Acquisitions
We record the acquired tangible and intangible assets and assumed liabilities of acquisitions of all operating properties and those development and redevelopment opportunities that meet the accounting criteria to be accounted for as business combinations at fair value at the acquisition date. We assess and consider fair value based on estimated cash flow projections that utilize available market information and discount and/or capitalization rates that we deem appropriate. Estimates of future cash flows are based on a number of factors including historical operating results, known and anticipated trends, and market and economic conditions. The acquired assets and assumed liabilities for an operating property acquisition generally include but are not limited to: land, buildings and improvements, construction in progress and identified tangible and intangible assets and liabilities associated with in-place leases, including tenant improvements, leasing costs, value of above-market and below-market operating leases and ground leases, acquired in-place lease values and tenant relationships, if any.
The fair value of land is derived from comparable sales of land within the same submarket and/or region. The fair value of buildings and improvements, tenant improvements, and leasing costs are based upon current market replacement costs and other relevant market rate information.
The fair value of the above-market or below-market component of an acquired in-place operating lease is based upon the present value (calculated using a market discount rate) of the difference between (i) the contractual rents to be paid pursuant to the lease over its remaining non-cancellable lease term and
(ii) management's estimate of the rents that would be paid using fair market rental rates and rent escalations at the date of acquisition measured over the remaining non-cancellable term of the lease for above-market operating leases and the initial non-cancellable term plus the term of any below-market fixed rate renewal options, if applicable, for below-market operating leases. The amounts recorded for above-market operating leases are included in deferred leasing costs and acquisition-related intangibles, net on the balance sheet and are amortized on a straight-line basis as a reduction of rental income over the remaining term of the applicable leases. The amounts recorded for below-market operating leases are included in deferred revenue and acquisition-related liabilities, net on the balance sheet and are amortized on a straight-line basis as an increase to rental income over the remaining term of the applicable leases plus the term of any below-market fixed rate renewal options, if applicable. Our below-market operating leases generally do not include fixed rate or below-market renewal options. The fair value of acquired in-place leases is derived based on management's assessment of lost revenue and costs incurred for the period required to lease the "assumed vacant" property to the occupancy level when purchased. This fair value is based on a variety of considerations including, but not necessarily limited to: (1) the value associated with avoiding the cost of originating the acquired in-place leases; (2) the value associated with lost revenue related to tenant reimbursable operating costs estimated to be incurred during the assumed lease-up period; and (3) the value associated with lost rental revenue from existing leases during the assumed lease-up period. Factors considered by us in performing these analyses include an estimate of the carrying costs during the expected lease-up periods, current market conditions, and costs to execute similar leases. In estimating carrying costs, we include real estate taxes, insurance and other operating expenses, and estimates of lost rental revenue during the expected lease-up periods based on current market demand at market rates. In estimating costs to execute similar leases, we consider leasing commissions, legal and other related expenses. The amount recorded for acquired in-place leases is included in deferred leasing costs and acquisition-related intangibles, net on the balance sheet and amortized as an increase to depreciation and amortization expense over the remaining term of the applicable leases. If a lease were to be terminated or if termination were determined to be likely prior to its contractual expiration (for example resulting from bankruptcy), amortization of the related unamortized in-place lease intangible would be accelerated. The determination of the fair value of any debt assumed in connection with a property acquisition is estimated by discounting the future cash flows using interest rates available for the issuance of debt with similar terms and remaining maturities. The determination of the fair value of the acquired tangible and intangible assets and assumed liabilities of operating property acquisitions requires us to make significant judgments and assumptions about the numerous inputs discussed above. The use of different assumptions in these fair value calculations could significantly affect the reported amounts of the allocation of our acquisition related assets and liabilities and the related amortization and depreciation expense recorded for such assets and liabilities. In addition, because the value of above and below market leases are amortized as either a reduction or increase to rental income, respectively, our judgments for these intangibles could have a significant impact on our reported rental revenues and results of operations. Costs directly associated with all operating property acquisitions and those development and redevelopment acquisitions that meet the accounting criteria to be accounted for as business combinations are expensed as incurred. During the years ended December 31, 2012, 2011, and 2010, we expensed $4.9 million, $4.1 million and $2.2 million of acquisition costs respectively,

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based on the level of our acquisition activity during those years. Our acquisition expenses are directly related to our acquisition activity and if our acquisition activity was to increase or decrease, so would our acquisition costs. Costs directly associated with development acquisitions accounted for as asset acquisitions are capitalized as part of the cost of the acquisition. . . .