I'm not specifically referring to a garage door, but modifying a rental property because you want it modified in  a way that you would like if you lived there.Remember,This is your business, not a personal project.

this is the scope of work. the dimension of the roof is roughly 45X151) Tear-off all layers of roofing and gravel down to wood decking and legally dispose. 2) Inspect wood decking and replace all deteriorated and broken areas at $ 2.50 per sq. ft. 3) Inspect existing Ceramic Copings and replace all deteriorated and broken at $ 35.00 Each.4) Install Fiber Cant Strip at the base of the walls and curbs.5) Install 1 layer of Base Sheet over wood decking using corrosion resistant screws and plats. 6) Install 1 layer of Modified Bitumen CertainTeed GTA Granulated. 7) Install Metal gravelstop and gutter flashings at the roof edges. 8) Flash all vents, soilpipes, and chimney using the same Modified Bitumen. 9) Install 5” Galvanized Box Gutter and 3x4 Downspout to replace existing. 10) Pick up and haul away all roof debris generated by Presidential.

The rules do not allow for a modification of the exchange properties previously identified to be modified after the 45 day period5.  

Technically speaking, since you're modifying the existing infrastructure of the single-family home you'd need to pull a permit.Now as far as the tiny home itself, if you're planning on renting it out (full time or short term) you'd need to check with your zoning/planning department.

We have modified kitchen design and added extra cabinets and Insland etc so that drove higher cost.For us some lesson learned, you want to go much details in contract and this is part where I need to learn and it is not easy to deal with contractors.

@Mark Henderson I don't have a real estate license. she basically is interested in selling because of modifying her mortgage and the rent she's getting is barley covering the mortgage.

If they follow what was outlined in the forbearance plan then they may modify the loan.

Just to put things in perspective, I am putting a modified screenshot of the convo I had with the person that motivated me to start this thread.

We talked to our bank about refinancing our main home and they offered to modify our loan instead by just reducing the interest. 

YOU should be the one to determine your market and whether or not it is profitable to take that loan or modify the terms.