I have spoken to my architect about this and he says so long as we are not changing the foot print, then an addendum would take 2-3 months if I were to make a major change...

Included in the price of this estimate is expanding a smaller bathroom into the existing footprint of the home, a tile shower with frameless glass shower enclosure, a freestanding soaker tub, a stone countertop, and a separate water closet.Primary additionComing in at one of the most expensive things on this list, a primary addition with midrange items costs homeowners an estimated $156,000 and recoups only 31% at closing time.Bottom line- only do what you need to do to get the best 'bang out of your buck'.

Think of environmental swift change, tornado, flooding, fire, fixed rental rate verses varied rental rates.

Mold damage in Florida is considered Environmental Hazardous.

For example, I've seen where a hobbyist investor/developer works on project, they hire an engineer and/or architect, but they ended up missing something vital, i.e. drainage issues, environmental, fire dept review, planning the wrong type of product for that market (buyer & renter demographic), etc.

I would definitely contact a local civil engineer or environmental engineering firm. 

This particular transaction not only included preparation of loan docs but also  review of subdivisions, deeds, permits, environmental reports, easements etc. 

As the world becomes increasingly digital and environmentally conscious, these factors are becoming critical in shaping the future of real estate investments, property management, and construction projects.

@Daniel Kern Bayhill Environmental is who I use.

The Clinic is expanding their footprint but as of now its not greatly impacting the whole zip code, its very localized.