Home Builder reviews in Olathe, Kansas

Meet with Jim, great meeting!

Great team, good experience

Very bad place they were rude

They were very unprofessional and they are rude

Costain is a professional company, with attention to detail and commitment to quality. Cami Reiss, owner of Reiss Earthworks LLC

Great family owned business and will go the extra mile to ensure the customers wishes. A truly honest business looking to get the most for thair customers and help them achieve their dream homes!

If I could give zero stars I would. We hired Costain Construction 16 months ago to build our new home. I've never seen such ineptness in a business. They’ve either never built a house or are just that bad at it. It has turned building our dream home into a complete nightmare. So many promises and deadlines were made and not met. Don’t believe a single word these people say.

I'm still waiting on several mistakes to be fixed, things that Jim Costain told me were no big deal (at least 2 months ago). I still don't have the custom front door that I paid for about a year ago. COMPLETE NIGHTMARE!

We worked with Costain Construction for an "owner build" method of our new home. Their team was approachable and easy to work with, guiding us through the entire process. We appreciated their responsiveness and willingness to make adjustments to create our forever home. We would definitely recommend them for your custom home construction needs.

We’ve had the pleasure of working with Elizabeth, Jim, Tierney, and Kyle for the past 3 years, and they truly are the best! They’re always accommodating with changes, focused on getting every detail right, and consistently go above and beyond to ensure the homeowner’s vision is brought to life. As a subcontractor, it’s clear how much they care about quality, timelines, and doing things the right way—not just quickly. Their communication, organization, and commitment to excellence make every project run smoothly. If you’re looking for a custom home builder who takes pride in their work and puts the client first, this is the team you want to work with.

Costain Construction - Jim, Elizabeth, and Kyle - were wonderful partners for the challenging process of "owner build" of a custom home. They kept the process on track and guided us through the countless details and challenges involved. We are very happy with our new dream home. Highly recommend Costain.

Jim and his team are the best. I have now used them several times for remodeling and they are the only people I trust. They get in, they work fast, they get out. Absolutely love the finished product.