"Sliding Door 改装成Swing Door,还有就是给Fireplace加一个好看一些的边框." Small job, DIY level. It depends on how much they charge you. Minto usually charge more than indepedent contractor.
I would not let minto do these two jobs.
Minto ask so many upgrades, you could post what is upgrade and what they charge you. I believe there is some contractor in here. They may able to help you.
I just think swing doors might look more elegant than sliding doors. I am afraid the latter will make me feel of living in a cheaply built apartment. By the way, could I ask how much your paid for changing to the swing doors?
Someone told me the standard Minto fireplace only has a ugly screen built in the wall. Will it cause a lot of work if I add a mantel to it later on instead of letting Minto do it? Thanks.
As what I read from the previous postings, it is not necessary to ask your builder to do such kind of work since they might ask for much higher price than those private contractors. Or even you could do it yourself if you like.