Yeah I was thinking that. So you have a mortgage on it or did you inherit it? If the latter, think pretty hard before you sell it, that is a crazy luxury that a lot of people will never be afforded.
OP is not from the USA. Income inequality is a thing, and properties are not ultra-expensive-compared-to-salary like in the US. Also, programmers often make a lot of money in some countries. My apartment was fully paid when I was 27, all with money from working for this one this one Big Corp which gave me a nice salary.
if the property-salary ratio is small, then what's the point of selling to fund a startup? sounds like it wouldn't provide much runway.
anyway, i don't mean to be judgemental. i'm just thinking aloud i guess, i've known a lot of computer people over the years and some have been spectacularly successful in industry, but i'm pretty sure that no one had substantial equity in property by that age. (or even a mortgage or deed)
to answer OP's question: i don't really know. conventional wisdom is that you should always find investors (not that you shouldn't have skin in the game) but that it's a gamble and they'll be better (and more prepared to take a loss) at making an educated bet than you are. that said, the technology sector is well known for nontraditional and unusual paths to success, so i suppose an argument could be made either way.
i guess the big question is: do you think you can do it and do you have the right people to help guide you along the way?