Pay off the house now or wait?

Have 400k in traditional- mix of C &S

Plan on working for about 4 more yrs.

My question is -should I pay off the house NOW- about 200k, (plus the 20%) - add to my monthly contribution-which is currently 12(plus the “5” agy match) ?

I’d hoped to have about 300k left when I bail 15% growth would get me there - am I being too risky?