A Warm Climate, Family Nearby and a $107,000 Question

Richard Montgomery on May 26, 2026

Q: My son-in-law in Texas has presented me with a proposal to build a small guest house on his property for me to live in permanently. He calls it an Accessory Dwelling Unit (ADU). I am in my late 70s, living in Minnesota and ready for a warmer climate and to be closer to family. The proposal is well thought out: an 800-square-foot single-story home. It also contains many aging-in-place features, including wider door openings, a walk-in shower and lower countertops. The estimated cost is $107,500, which I would fund entirely from my own savings. In exchange, I would pay no rent, but I would also have no ownership interest; the structure and land remain his. The timeline is estimated at 14 months from design through final completion. My question is simple: Is this a good idea?

A: Your son-in-law has done his homework. The proposal is thoughtful, the accessibility design is sound and the instinct to be near family in your later years is one I hear often and respect. That said, there are dimensions to this arrangement that deserve careful examination before you write a check.

The financial structure carries real risk. You are being asked to invest $107,000 into a structure you will not own. If the relationship changes -- divorce, financial hardship, relocation for job change -- your housing security evaporates along with your capital. The proposal frames this as "mutually beneficial," and it may well be. But goodwill is not a legal protection.

Before proceeding, consult a real estate attorney in Texas to explore whether a life estate, a recorded deed restriction or a formal occupancy agreement can protect your right to remain in the structure regardless of what happens to the property or the marriage. This is not a reflection on your son-in-law's character. It is simply prudent.

The $100 per square foot cost estimate deserves scrutiny. Construction costs in Texas vary significantly by region and material and labor prices have been volatile. Get at least two independent contractor bids before committing funds. The proposal's all-inclusive $100/sq ft figure is optimistic in many Texas markets today.

The permitting timeline is realistic, possibly conservative. Six months for permitting is not unusual, particularly in municipalities with ADU-specific review processes. Texas has generally been ADU-friendly at the state level, but local ordinances vary widely. Confirm in writing with the specific municipality that they allow a detached ADU on the property before any money changes hands.

The design itself is well-conceived. Single-story, no-step entry, curbless shower, reinforced walls for future grab bars, wide hallways, these are exactly the features that allow people to age in place comfortably. The hurricane-rated construction and CMU block are appropriate for Texas coastal or South Texas conditions. If the property is inland, some of that specification may be overbuilt, which is not a problem; it simply adds durability.

One conversation worth having: What happens to your investment if you need memory care or skilled nursing before the home is completed or shortly after? Having a plan for that scenario in writing protects everyone.

Consult a Texas real estate attorney, get independent construction bids and insist on a recorded legal instrument protecting your occupancy rights. If those three steps produce satisfactory results, this arrangement has genuine merit.

Richard Montgomery is a syndicated columnist, published author, retired real estate executive, serial entrepreneur and the founder of DearMonty.com and PropBox, Inc. He provides consumers with options to real estate issues. Follow him on Twitter (X) @montgomRM or DearMonty.com.

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