Christopher Marr
Analyst · Citi
Thanks, Tim. When we entered 2011, we had 3 key points of focus. The first was to continue to improve the quality of our portfolio cash flows through acquisitions in our core markets and dispositions in slower growth, lower barriered entry markets. During 2011, we acquired wholly owned assets in the Northern Virginia suburbs of Washington, D.C. specifically, Fairfax and Leesburg, Virginia; Miami, Florida; White Plains, New York; the Maryland suburbs of Washington, D.C. specifically, District Heights, Maryland; and in the District of Columbia itself.
Through our joint venture with Harrison Street, we now own a 50% interest in assets in the Philadelphia suburbs; the Washington DC suburbs; Long Island, New York; and Northern New Jersey. Combining our equity investment in the JV on our wholly-owned acquisitions, we invested approximately $127 million in these core market transactions. The Storage Deluxe acquisition was transformational and accelerated our long-term objective of earning the majority of our cash flow from our core markets. Upon our final closing, approximately 60% of our future cash flow will be derived from our core market assets. In February, as Tim mentioned, we closed on one of the final 6 Storage Deluxe assets. We anticipate closing on 3 additional assets before the end of this month and the last closing is expected before the end of the first quarter.
Our acquisition program continues to benefit from our relationships in the self-storage industry, our reputation as a quality buyer and our third-party management program. Of our 2011 acquisitions, 9% were acquired through a broker marketed process and 81% were acquired on a direct basis, either acquiring managed assets or us working directly with the seller. Of our non-Storage Deluxe acquisitions, 60% were the acquisition of properties we were managing for a third party. Our third-party management program not only provides us with a built-in acquisition pipeline, it has also been a source of cash flow growth. We generated $3.8 million of fees for the program in '11, a 36% increase from 2010. During the year, we added 23 new managed facilities, a 25% increase from where we ended 2010. On the disposition front, we generated proceeds of $45.2 million from the sale of assets in the Midwest, Cleveland and Canton, Ohio; Indianapolis, Indiana; and suburban Detroit.
We continue to experience roughly 100 basis point yield differential between cap rates on acquisition and cap rates on dispositions. Looking ahead to '12, we expect our external growth initiatives to be fairly similar to our outlook entering 2011. We will continue to acquire high quality assets in our core markets. Thus far in the year, we have closed on 2 transactions in our core markets, one on a broker basis and one third-party management acquisition for an investment of $12 million. We are targeting acquisitions in the $75 million to $125 million range for the year. Our pipeline is as full as it has ever been and we're off to a great start. Our third-party management pipeline is positively overflowing. We continue to receive inbound inquiries and are currently working with owners of slightly more than 100 assets.
On the disposition front, we have an objective of selling $35 million to $50 million of assets and currently have contacts for sale totaling $6.5 million. Cap rates on acquisitions in our core markets continue to be in the 7% to 7.25% range and our dispositions, we continue to target in the low to mid 8s. Our second point of focus is on generating increased cash flow from our own portfolio. Entering the year, we outlined our objectives. 2.5% to 3.5% revenue growth, 2% to 3% expense growth and 2% to 3% NOI growth as well as growing our occupancy by 150 to 200 basis points. Our actual results, 3.6% revenue, 0.3% expense, 5.7% NOI growth, all exceeded our expectations entering the year.
Our physical occupancy grew 460 basis points from our low of 76.3% in January of '11 to a peak of 80.9% in July. For the year, our average occupancy grew 200 basis points from 2010 average levels. Our 2012 revenue and occupancy outlook is consistent with our actual results for '11. Our base case assumes an occupancy growth trend similar to '11 and we are targeting another 150 to 200 basis point gain. We expect to generate our revenue growth largely from occupancy gains with a contribution from ancillary income, mainly tenant insurance. If we continue during Q4, to have 91% of new renter's take tenant insurance and overall, would climb to 61% of our total tenant base insured. On operating expenses, our focus on controlling costs continues to benefit us and has been accomplished while we have continued to provide salary increases to our store and field personnel as well as being able to have no increase to employee paid health insurance premiums. We are pleased with our efficiency.
We believe we have squeezed as much as we can and expect modest expense increases in 2012. Our third point of focus is the continuous improvement of our balance sheet and maturity profile. As Tim noted, we achieved an objective we first articulated 5 years ago, receiving investment grade ratings from Moody's and S&P and we are targeting our debut investment grade offering for the second and third quarter of the year.
We have a well-staggered maturity level, low leverage levels and a significant pool of unencumbered assets. However, we do believe that our maturity profile of about 4 years still remains an objective to be extended and we will do so assuming we complete our targeted debt issuance this year. As our capital raising activity in 2011 proved, we are well-positioned to access multiple capital markets. During the second half of '11, we introduced our Superstore concept and our new brand.
As of February 15th of this year, we have 41 Superstores across the country and our average investment per store is at 44,000 compared to our 50,000 per store original estimate. We have converted 212 of our stores to permanent CubeSmart signage and branding and are on track to convert the remaining stores by April. We currently estimate a capital investment of $2 million to $3 million in 2012 bringing our estimated total cost upon completion to a range of $4.5 million to $5.5 million that compares to our original $8 million estimate.
We have built a platform of people, systems and processes at CubeSmart that has proven to be a solid foundation for growth. This is evidenced by our fourth quarter activity during which, we entered into the stores to launch transactions, raise the significant amount of capital, close to first tranche of the Deluxe acquisition and smoothly integrated assets, acquired 2 additional core market assets, disposed of an asset, rebranded the company, continued the roll out of our Superstores, reduced operating expenses and had a very strong quarter from a same-store rental activity perspective with move-ins up 6% from the same quarter of 2010, which then included an 11% increase in the month of December.
On behalf of the entire senior management team, I wish to thank all of our employees for the focus and dedication during an extraordinary 2011. It is due all of our 1,300 associates moving in lockstep that we've been able to meet and exceed our objectives. At this point, operator, we would like to turn the call over for questions.