My primary residence is currently being remodeled- new kitchen and bathrooms.

Live in renovations for something like a kitchen or bathroom upgrade are possible but messy.

But renting an entire apartment or house is not cheaper than a hotel room, which is only a bedroom and bathroom. 

We will expand the septic, add 3 bedrooms and 2-3 bathrooms.

We will expand the septic, add 3 bedrooms and 2-3 bathrooms.

Keep it to a bathroom refresh or adding a bedroom at max.

*Note that we interchangeably use the labels: Lodging House = Rooming House = Single-Room Occupancy (SRO) = Co-Housing PropertyThe building has 3 kitchens and 4 full bathrooms, on 4 floors:3rd floor: The 3rdfloor is ‘off-limits’ to the 1st and 2nd floor tenants, so the two 3rd floor tenants enjoy the exclusivity of their own entrance, and a kitchen and bath shared only with one other unit, plus some distant ocean and Boston skyline views.2nd & 1st floors: Eleven units share 1 kitchen and 2 full bathrooms, one on each floor.

I would not add much, a simple bedroom, bathroom, kitchen, and hvac.Another aspect of this deal is that the building is listed as a historic building and thus could qualify for some grants. 

We completely remodeled the kitchen and bathrooms.

The garden unit is non-conforming but fully equipped with 3 bedrooms, a living room, and a full bathroom.