Mitchelldale Business Park is a 377,752 square-foot Class B industrial park comprised of twelve build-ings on 24.99 acres. It is located in Houston’s north-west industrial submarket. This industrial park was built in 1977, remodeled in 2004, and is currently 89% occupied. Mitchelldale Business Park has a diversified tenant base, with only a single tenant making up greater than 5.0% of the overall rent roll. Though Mitchell-dale has nearly seventy tenants, no single industry constitutes more than a third of the tenant base. **Source: Mitchelldale Business Park Offering Memorandum, HFF, L.P. & CoStar

HARTMAN SHORT TERMINCOME PROPERTIES XX, INC.

PROPERTY ACQUISITIONHARTMANMitchelldale Business Park

EXECUTIVE SUMMARY

Location 5151 Mitchelldale Houston TX 77092

Net Rentable Area

Total Purchase Price

Loan to Value 66%

Acquisition Date June 13, 2014

Occupancy 89% (as of June 17, 2014)

Year Built 1977, remodeled in 2004

LOCATION SUMMARY

377,752 square feet

$19,175,000

Houston has consistently been a leader in employment and population growth, and is currently ranked as the fastest growing economy in North America by the Brookings Institution. According to the Texas Workforce Commission, in February, 2013 Houston ranked first in annual job gain, and Moody Analytics forecasts Hous-ton will be first in the nation in job growth between 2011 and 2016. Mitchelldale Business Park is located in the Northwest Industrial Submarket of Houston, near the intersection of U.S. Highway 290 and Beltway 8, which is widely known as the “Main and Main” location for all regional distribution centers in Houston.*

*Source: Mitchelldale Business Park Offering Memorandum, HFF, L.P. & CoStar

Mitchelldale Business Park, Houston, TX

HartmaN Short Term Income Properties XX, Inc.2909 Hillcroft · Suite 420 · Houston, Texas 77057 · 800·880·2212

www.HARTMANREITS.com · www.HARTMANREITS.com/HARTMAN-XX/prospectus/

PROPERTY ACQUISITION

Mitchelldale Business Park

CONSIDER THESE RISK FACTORS BEFORE INVESTING

Revised date: 08/26/2014

Please read the prospectus in its entirety, before investing, for complete information and to learn more about the risks associated with this offering such as:

HartmaN Short Term Income Properties XX, Inc.2909 Hillcroft · Suite 420 · Houston, Texas 77057 · 800·880·2212

www.HARTMANREITS.com · www.HARTMANREITS.com/HARTMAN-XX/prospectus/

THIS IS NEITHER AN OFFER TO SELL NOR A SOLICITATION OF AN OFFER TO BUY THE SECURITIES DESCRIBED HEREIN. AN OFFERING IS MADE ONLY BY PROSPECTUS. THIS LITERATURE MUST BE PRECEDED OR ACCOMPANIED BY A CURRENT HARTMAN SHORT TERM INCOME PROPERTIES XX, INC. PROSPECTUS. AS SUCH, A COPY OF THE CURRENT PROSPECTUS MUST BE MADE AVAILABLE TO YOU IN CONNECTION WITH THE OFFERING AND SHOULD BE READ IN ORDER TO MORE FULLY UNDERSTAND THE IMPLICATIONS AND RISKS OF THE OFFERING OF SECURITIES TO WHICH IT RELATES. NON-TRADED REIT INVESTMENTS ARE NOT SUITABLE FOR ALL INVESTORS. INFORMATION ABOUT INVESTING IN A SPECIFIC NON-TRADED REIT MUST BE ACCOMPANIED BY A PROSPECTUS, WHICH SHOULD BE READ PRIOR TO INVESTING. No offering is made except by a prospectus filed with the Securities and Exchange Commission (“SEC”). Neither the SEC nor any other state or federal regulator has passed on or endorsed the merits of the offering or these securities or confirmed the adequacy or accuracy of the prospectus. Any representation to the contrary is unlawful. All information contained in this material is qualified in its entirety by the terms of the current prospectus. The achievement of any goals is not guaranteed.

All information contained in this material is qualified in its entirety by the terms of the current prospectus. Investors should consider a fund’s investment objectives, risks, charges and expenses before investing. The achievement of any goals is not guaranteed. For more complete information about investing in HSTIPXX, including risks, charges and expenses, refer to our prospectus. The prospectus is available by contacting Hartman Short Term Income Properties XX, Inc. at Hartman Short Term Income Properties XX, Inc., 2909 Hillcroft Ste. 420, Houston, TX 77057, T 713-467-2222. Securities offered through D.H. Hill Securities, LLLP, Member FINRA / SIPC, 7821 FM 1960, Humble, TX 77346. (832) 644-1852.

• We commenced operations on December 28, 2010 and therefore have a limited operating history. There is no assurance that we will be able to successfully achieve our investment objectives.

• The amount of dividends we may pay, if any, is uncertain. Due to the risks involved in the ownership of real estate, there is no guarantee of any return on your investment in our shares, and you may lose all or a portion of your investment.

• There is currently no public market for our common shares and therefore, it likely will be difficult for you to sell your shares, and if you are able to sell your shares, you will likely sell them at a substantial discount. • There are restrictions and limitations on your ability to have all or any portion of your shares redeemed under our share redemption program.

• Effective April 25, 2013, we determined that our registration statement declared effective February 9, 2010 was no longer effective under the Securities Act of 1933 (the “Securities Act”). We considered the possibility of affording the remedy of rescission to stockholders who purchased common shares during the period that we were required to file post-effective amendments to our registration statement. As of the date hereof, no affected stockholders or state regulators of any state in which any affected stockholders reside has sought or given notice of any intention to seek rescission.

• We have made a limited number of investments and other than investments and prospective investments disclosed in the prospectus or in a supplement to the prospectus, we have not identified any specific assets to acquire or investments to make with the proceeds of the offering. As a result, you will not have the opportunity to evaluate our investments, aside from our limited number of existing investments, prior to your investment. • We rely on Hartman Advisors, LLC and its affiliates for our day-to-

day operations and the selection of real estate investments. We pay substantial fees to these affiliates for these services. These affiliates are subject to conflicts of interest as a result of this and other relationships they have with us and other programs sponsored by Hartman. We also compete with affiliates of Hartman for tenants and investment opportunities, and some of those affiliates will have priority with respect to specified investment opportunities.

• Our distributions may exceed our earnings, particularly during the period before we have acquired a substantial portfolio of real estate assets. Our distributions may be paid from sources other than cash from operations, such as borrowings, offering proceeds or deferral of fees and expense reimbursements by our advisor, in its sole discretion. We have not established a limit on the amount of proceeds from the offering that we may use to fund distributions. Therefore, portions of the distributions that we make may represent a return of capital to you, which will lower your tax basis in our shares. To date, distributions have been paid from offering proceeds and may be paid from offering proceeds or other sources other than cash from operations, such as borrowings, in the future. There is no limit on the amount of offering proceeds we may use to fund distributions.

• One of our objectives is to provide cash distributions to our stockholders from cash generated by our operations. We have made and may continue to make distributions in excess of our earnings and cash generated by operations. Distributions in excess of earnings and or cash generated by operations reduces the amount of capital available for investment in real property.

• Our use of leverage increases the risk of loss on our investments.

• If we fail to continue to qualify as a REIT, it would adversely affect our operations and our ability to make distributions to our stockholders and may have adverse tax consequences to our stockholders.