Ya ~ I would consult with an accountant who specialized in 'home based businesses' ... there are ways to do this without having to do 'capital gains' later when you sell ~ basically breaking it down and writing off the 'start up' costs over the course of several years and so forth verses ALL in one year as well as terminology of is it improvement/addition to the home or 'health and safety repair' for the purpose of the business ... aka if you are going to be using the space for childcare you cannot have exposed installation where children play ~ you would need to rough in wallsThe addition of a kitchen might be a hard sell cause you already HAVE one of those so adding one for daycare purposes would be an 'improvement' and so forth.
For example when I opened I had to have an additional 'window' put in my playroom as the secondary fire exit to meet the City bi-laws for using that space for business because the other windows were 'window wells' that an adult could not easily 'exit' in a fire ~ myself my boobs would be too big to fit through thoseSo this was not something that was done to my house for an improvement / addition but to meet a health and safety requirement of business ~ it was a business expense so the accountant wrote off 100% of that.
Other things we have fixed or repaired we only wrote off a 'shared use of home' portion of it verses ALL of it because it benefited not only the daycare but our home as well.