Sometimes it’s a phone call after a fall. Sometimes it’s a slow realization over a few holidays that Dad shouldn’t be driving at night anymore. Either way, the decision lands the same way: Mom or Dad is moving in, and you’ve got about a hundred questions and no plan.

Take a breath. This is doable.

The first 90 days are for deciding and preparing — not for finishing construction. Here’s a checklist that breaks the work into three manageable stretches, plus what to do in the meantime.

Key Takeaways

• Days 1–30 are about conversations, a clear needs assessment, a budget and choosing the right housing option.
• Days 31–60 are for checking your lot and zoning, starting design and preparing permits.
• Any real construction project will take longer than 90 days, so plan an interim living setup from day one.
• Your four main options — remodel a room, convert the garage, build an addition or build an ADU — trade off time, privacy and cost differently.

Days 1–30: Talk, Assess, Budget, Decide

Have the real conversations

Start with your parent, not the floor plan. Ask what matters most to them: privacy, being near the grandkids, keeping their own kitchen, bringing the dog. Then bring in your spouse, your kids and your siblings. Everyone who will be affected deserves a voice.

Talk about the uncomfortable stuff too. Who handles doctor’s appointments? Who pays for what? What happens if care needs grow?

Do a needs assessment

Write down what your parent needs today and what they may need in five years. Can they handle stairs? Do they use a walker or wheelchair now, or might they later? Do they need help with bathing or medications?

Be candid here. If your parent needs memory care or round-the-clock medical support, a senior living community may be the better answer, and that’s okay.

Set a budget

Look at what your family can put in, what your parent can contribute, and what you might finance. Don’t count on Medicare to help with construction — it won’t. We explain why, and what can help, in Does Medicare Pay for a Granny Pod?

It also helps to compare building against senior living costs over time. Our 10-year cost comparison walks through the math.

Pick your option

Most families end up choosing among four paths:

• Remodel an existing room. Turn a downstairs bedroom or den into a parent suite with an accessible bathroom.
• Convert the garage. Use the footprint you already have for a small, self-contained apartment.
• Build an addition. Add a ground-floor in-law suite attached to the house.
• Build a detached ADU. A separate small home in the backyard with its own front door.

Option	Typical timeline	Privacy	Cost (Tampa Bay planning range)
Remodel an existing room	Shortest — often weeks to a few months	Lowest; shared living space	Usually the lowest of the four; depends on scope
Garage conversion	Several months including design and permits	Moderate to high	$175,000+ for a full ADU-style conversion
Addition / in-law suite	Many months, design through completion	Moderate to high; attached but separate	About $175,000–$275,000 for a ~400–600 sq ft ground-floor suite
Detached ADU	Many months, often the longest path	Highest; own front door	$175,000–$350,000 all-in

Every lot is different, so get a real number before you commit. If you’re torn between the two most popular builds, read our garage conversion vs. detached ADU comparison.

Days 31–60: Lot, Zoning, Design, Permits

Check your lot and zoning

Before anyone draws a line, find out what your property allows. In the City of Tampa, full ADUs are allowed only in designated areas, while the rest of the city uses the Extended Family Residence (EFR) path for family members, up to 600 sq ft, approved through Special Use. Unincorporated Hillsborough County and St. Petersburg have their own rules. Our ADU rules guide covers all three.

Also check:

• HOA covenants and architectural review requirements
• Flood zone and elevation requirements
• Setbacks, easements and where utilities run
• Whether you’re on sewer or septic

Start design

This is where the needs assessment pays off. Design for today and for later: wider doors, a zero-step entry, a curbless shower and blocking in the walls for grab bars. Florida’s building code doesn’t require these in single-family homes, so you have to ask for them. Our universal design spec sheet lists the details worth building in.

Prepare permits

Your design team pulls together drawings, engineering and a survey for permit submittal. Design and permitting typically run 5–10% of the project. Utility taps and site work can run tens of thousands before a wall goes up, so get those fees in writing early.

Days 61–90: Finalize and Bridge the Gap

Here’s the part nobody likes to hear. Unless you’re doing a simple room remodel, construction won’t be done by day 90. Between design, permit review, inspections and the build itself, a garage conversion, addition or ADU takes longer than three months. Sometimes a lot longer.

So use days 61–90 to lock in your contract and schedule, and to set up a comfortable interim plan.

Interim solutions while you build

• Use a spare bedroom temporarily. Add a shower chair, a handheld shower head, night lights and a few removable safety items.
• Clear the trip hazards. Pull up throw rugs, tidy cords and light the path to the bathroom.
• Bring in part-time help if needed. In-home non-medical care runs about $35 an hour, based on CareScout’s 2025 national median.
• Keep your parent in their current home a little longer. If it’s safe, that buys time and avoids two moves.
• Protect everyone’s sanity. Set house rules, carve out quiet time and keep talking.

Frequently Asked Questions

How long does it take to prepare for a parent moving in?

Plan on about 90 days to have the conversations, set a budget, choose an option, check zoning and start design and permits. Construction of a garage conversion, addition or ADU usually takes longer than that, so set up an interim living arrangement.

What is the fastest way to make room for a parent?

Remodeling an existing room, like a downstairs bedroom or den, is usually the fastest and least expensive option. The tradeoff is less privacy, since your parent shares the main living space.

How much does an in-law suite cost in Tampa?

A ground-floor in-law suite addition of about 400 to 600 square feet typically runs $175,000 to $275,000 in Tampa Bay. Detached ADUs generally run $175,000 to $350,000 all-in. Every lot is different, so get a real number for your property.

Do I need a permit to convert my garage for a parent?

Yes. Converting a garage into living space requires permits, and zoning rules decide what you can build. In the City of Tampa, family-only units outside designated ADU areas go through the Extended Family Residence Special Use process.

Should my parent move into senior living instead?

Sometimes. If your parent needs memory care, round-the-clock medical support, or would be alone most of the day, a senior living community may be the better choice. A needs assessment in the first 30 days helps you decide.

Will Medicare help pay to build space for my parent?

No. Original Medicare does not pay to build or buy a granny pod, ADU, addition or home modifications. Some Medicare Advantage plans and Florida’s Medicaid long-term care program may help with smaller accessibility items.

Start With a Plan, Not a Panic

You don’t have to figure this out alone. TomCo’s design-build team handles design, permits and construction under one roof, whether that’s an in-law suite addition or a backyard ADU.

Schedule a private 30-minute consultation or call (813) 922-2299.