Rising ADU home upgrades in Houston (203k loan)
Member since 2026 · 1 post · 0 votes
In Houston, there is a rising trend of single family homeowners building ADUs in the backyard or converting their garage to an ADU.
I live in an area that is quickly experiencing gentrification and the homes on my street are being flipped or built up.
My goal is to turn my attached garage (1,200 sqft) into a 2 story apartment and rent out. I want to use the 203K loan for the project and also to landscape the primary home (including excavation work around the foundation), and remodel the primary bathroom. My goal is too increase my home value. 2023 appraisal: $280k 2026 ARV goal: $400K Is this reasonable? any tips? Am I better off using the 203k to flip a different property?
A seasoned General Contractor is offering a feasibility assessment at $1K. Is this a good step to take?
See the agents BiggerPockets members work with in Houston, TX.
See agentsNAR this month pulled their ADU data. They indicated it was because it was dated. It was getting dated, but I believed they pulled the data because it did not back the narrative that NAR would have preferred. I wish I had screen shot their data. I do not know what the NAR data showed for Houston.
The NAR data showed in a very large majority of the cities the ADU Addition added less value than the hands off ADU addition. In my market (San Diego) the NAR data showed ADUs added less than $20k of value. This was worse than most, but there were cities worse including some that the ADU addition reduced the value of the property.
Make sure you KNOW the value that will be added by adding an ADU before you proceed. In most markets the ADU results in a negative equity position (costs more than the value added). This negative position must be recovered before any realized cash flow.
Have you done the underwriting on the operations? Did you do the quick napkin math via the 50% rule? In most markets high LTV ADU additions, like most other RE investments in this market, do not have great cash flow and can take years to recover the negative equity position.
Here are reasons in my market adding an ADU in single family zoned areas typically is not a good RE investment. Some of these are likely not applicable in Houston.
1) The value added by the ADU addition is often significantly less than the cost of adding the ADU. Search the BP for ADU appraisals to encounter numerous examples. This creates a negative initial position. This negative position can consume years of cash flow to recover. Make sure you know the value the ADU will add to the property before building the ADU.
2) the financing on an ADU is typically far worse than for initial investment property acquisition or is often not leveraged by the ADU (HELOC, cash out refi, etc). Leverage magnifies return.
3) The effort involved in adding an ADU is comparable or larger than a rehab associated with a BRRRR. However if I do a BRRRR I can achieve infinite return by extracting all of my investment. Due to item 1, adding an ADU can require years to start achieving any return (once the accumulated cash flow recovers the initial negative position).
4) Adding an ADU is a slow process. It can take a year or more to complete an ADU. During this time you are not generating any return from the money invested in the ADU. This amounts to lost opportunity because if you had purchased RE, at the closing it can start producing return.
5) ADUs detract from the existing structure whether this is privacy, a garage, or just yard space.
6) this is related to number 1, but there are many more buyers looking to purchase homes for their family than there are RE investors looking to purchase small unit count properties. This may affect value or time required to sell.
7) Adding an ADU does not make the property a duplex. For example in many jurisdictions I can STR units in a duplex but cannot STR an ADU (some jurisdictions will let you STR if you owner occupy). Duplex have different zoning that may permit additional units. Duplex can always add additional units via the ADU laws.
8) Related to number 1, purchasing a property with an existing ADU is cheaper than buying a property and adding an ADU. Why add an ADU if it can be purchased cheaper?
9) adding multiple ADUs or adding an ADU to a quad looses F/F conventional financing. This reduces exit options and affects the value. The first part of this may have recently changed (someone indicated it had changed but I have not verified it.
10) Small number of small units is the most expensive residential development there is. This implies residential units can be built at lower costs and provide better return than building a single ADU.
11) adding an ADU to SFH can make the SFH fall under rent control. In CA currently only MF properties are rent controlled. If the house is older than 15 years old and an ADU is added, it can become rent controlled. Rent control laws are market specific. Make sure you know the impact that adding an ADU will have on any rent control.
12) investors seldom include the land value in the overall ADU costs. The reality is the land has value.
Good luck