Trying to Balance retirement and saving for house

I just turned 29 and I want to start saving for a house. I plan to buy sometime in my mid 30s with my partner. Housing market around me is pricey, so assuming we will need $200-300k together for a down payment. I make 125k a year. I have 90k in Roth IRA. 60k in 401k. $30k in company stock. $23k in a brokerage account, and $10k in savings/expense account.

My plan is to continue maxing Roth IRA and reducing 401k contribution to 4% to maximize my company match, and put the rest of my excess earnings to savings. Is this too detrimental to my retirement saving? Or am I not being aggressive enough in saving for the house?