Mark Decker
Analyst · Janney
Thanks, Matt, and welcome, everyone. This is the most exciting earnings call I've been on. We've all been working hard to instill the core principles of capital allocation, operational excellence and balance sheet strength into our management of the business and it's starting to show in the results. Also, for the first time, these results are focused on our core business. After today, we're finished talking about our transformation. We now have the multifamily business we've been working toward. Going forward, we can talk exclusively about our apartment communities and put behind us the discussions of large noncore asset sales and other events that created uncertainty for our investors and divided our internal resources. And with the portfolio transition behind us, we can focus all of our attention and yours on improving what we have, and I'm confident we can.
With that said, I'd like to summarize at a high level what we've done over the past 2 years to bring us to this point. I'd like to start by thanking those of you who've been with us through this process. If you're a new listener, we're glad you're here as well. We communicated our intent to focus exclusively on multifamily in June of 2016, and we moved with purpose and speed to execute on that goal, informed by the view that the plentiful capital, relative economic stability, low interest rates and deep demand for real estate provided opportune conditions to sell non-strategic properties. We've generated almost $800 million through noncore property sales since June of '16 and nearly $1.5 billion since 2013, when we embarked on this transformation.
We took that capital and we invested over $860 million in new apartment communities, paid down almost $400 million of debt, repaid over $40 million of high-cost preferred stock and repurchased or redeemed over $20 million of shares in units. Including Westend, a 390-home community we have under contract to purchase in Downtown Denver, we've redeployed over $370 million in the last 12 months into 1,355 apartment homes in our strategic growth markets of Minneapolis and Denver. Of course, we carried out the multifamily redeployment in the same environment of abundant capital and low rates that we sold into, but we believe we substantially improved our business and growth profile. We traded heavy exposure to multi-tenant commercial assets with large tenant concentrations for a pure 14,000-home apartment portfolio with leverage to a growing economy. We traded long-duration leases with large event-driven capital needs for short-duration leases and consistent capital expenditures. We traded out of healthcare, which is highly regulated and constantly evolving, for the simplicity of housing. We also transformed the nature of our multifamily cash flows, from almost exclusively secondary and tertiary markets to meaningful exposure in Minneapolis and Denver, 2 key markets that have diverse fundamentals and a positive outlook.
Four years ago, Minneapolis communities provided 3% of our multifamily NOI. Today, we generate 20% from Minneapolis and Denver. Looking forward, and taking into account our new non-same-store assets, we expect 30% of our NOI will come from those top 25 markets. We also pruned and will continue to enhance our multifamily portfolio, taking our average community size up 24% from 127 homes per property to 157, creating greater efficiencies. We fundamentally changed our approach to leverage, moving from 100% secured to 80% today and heading lower. We lowered the absolute amount of leverage. And today, we have more liquidity and balance sheet flexibility than ever before. One of the biggest changes we've made is how we've strengthened our operations team to uncover and unlock efficiencies and improve our customer experience. We have an exceptional team that inspires me every day and has massive capability, capacity and desire to execute on our strategic goals as well as our day-to-day operations. At the board level, we added experience and diversity of perspectives, while maintaining some of the best governance in the business. These positive changes aren't immediately reflected in our financials, but I believe they will be instrumental in achieving consistent and long-term growth. Most importantly, this is a company that now has a clear mission and focus. And as we transition from transactional to operational, our same-store portfolio continues to strengthen.
Third quarter same-store revenue grew 5.2% over the prior year's quarter, accelerating over the results from the first 2 quarters of fiscal 2018. And notably, that revenue growth resulted in 5.8% NOI growth over the same period. This is the first quarter we posted meaningful same-store NOI growth in roughly 3.5 years. And this is an obvious testament to the hard work of our operations team and our improving markets. Looking forward, we are excited to spend 100% of our time and effort to make IRET better, and we will accomplish this by putting our customer at the center of everything we do as we work to fulfill our mission of providing great homes to our residents, our employees and our investors.
In summary, we're thrilled to be where we are. We are pleased to have sold our entire MOB portfolio prior to the recent interest rate increases and softness in healthcare REITs. We have done all the redeployment we feel we need to do and can be opportunistic in our external growth going forward, and at the same time, we have identified numerous initiatives for solid internal growth.
Having said all that, there is no "mission accomplished" banner hanging behind us and a few data points do not make a trend. We are optimistic about where the business is today and maintain a clear-eyed view of the tasks that remain ahead of us, and the realm of competition we are stepping into as we've come to be compared to some truly great owner/operators with outstanding portfolios, but we are excited to be in the ring.
With that, I'll turn the call over to John.