Central Texas' Premiere, top-selling Duplex And Fourplex Brokerage every year Since 2004

Castle Hill Duplex is a team of experienced real estate professionals that offers unmatched expertise in the unique niche of 2 to 4 unit residential buildings. We've won 'Top Producer' awards from the Austin Business Journal every year, and represented thousands of owners. In addition, as one of the largest owners of duplexes and fourplexes in the area, our hands-on experience allows us to provide unparalleled service.

2019 Residential Real Estate Award Winner

Want To Be Notified Of New Listings? 

What Differentiates Castle Hill From Other Brokerages?

Brokerage and Investment Experience

Broker/Owner Robert Grunnah has sold more residential property than 99% of local real estate agents, including a record 2,000+ duplexes and fourplexes, some of which he has owned himself. This level of mastery is unparalleled among real estate professionals.

We help with renovations

Our in-house construction team will meet with owners to determine minor or major improvements that will help maximize re-sale value, and we'll perform the work on your behalf.

Our Investor Database

In addition to buying properties outright from owners ourselves, we have a comprehensive list of investors and agents that we work with that are often able to acquire listed properties immediately, reducing cost and headaches of long sales.
  • I am extremely pleased with my experience in selling my Austin fourplex. Robert and his team made everything so easy for me, and my fourplex had several offers, all above the listing price. Robert and his team were always there if I had a question or concern and the process was seamless. I would gladly work with Castle Hill again.

    Nancy F.

  • We can't thank you enough. We've worked with Castle Hill for the past 5 years and they really came through for us when times were tough. We find Robert and his staff to be friendly, effective and very efficient.

    Christine D.

  • Robert and his team at Castle Hill Duplex have been excellent to deal with for the past two years. With attention to detail, the entire team at Castle Hill has always worked their hardest, especially when compared to other folks in the Austin Real Estate market.

    Shawn P.

  • Robert's team helped me sell 3 of my properties this year and I'm very happy with the results. He and Adrienne really have a pulse on the market. They're tough negotiators and are on your side. Thanks for your all help, Robert and the rest of the staff at Castle Hill!

    Nisheth J.

  • Just closed a deal on Friday with Castle Hill Duplex. Excellent transaction, communication and professionalism!

    Theresa B.

  • I have worked with Robert on more than 5 transactions since 2003. No one knows the Austin investment property market better than him. I heavily rely on his expertise and advice.

    Joerg A.

  • Not being wholly versed in Texas Real Estate, Castle Hill guided me through the transaction and made the process seamless and painless. I would highly recommend Robert and his team of professionals.

    Brian C.

The Stats Speak For Themselves:

CASTLE HILL DUPLEX

MARKET AVERAGE

SOLD TO LIST PRICE

99.7%

94%

SOLD TO LIST PRICE
DAYS ON THE MARKET

14 DAYS

34 DAYS

DAYS ON THE MARKET
As 2018 came to a close, Castle Hill Duplex has represented over 2,200 buyers and sellers of duplexes and fourplexes in the Austin and Round Rock Metro area, completing our 15th year of market leadership in the duplex and fourplex category.

Listings By Region:

starphone-handset