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Welcome to AGI


 American General Investors LLC, which was organized in 1965, specializes in the development, construction, and management of commercial and residential real estate. We are a family owned and operated business. Some of our principals are third generation family members involved in the real estate industry. 

Meet The Team

Nick Guastaferri, Mike Guastaferri, Mark Guastaferri, Paula Mirabelle

Check out our team's pictures and bios!

What We Do


 American General Investors acquires real estate, guides it through the local and state land use agencies to increase it's potential to the maximum, constructs a building or buildings, and finally, manages the development for an extended period of time. We currently manage a substantial amount of commercial and residential real estate in the Prospect, Connecticut area and the Waterbury, Connecticut area.  

Our Business


 We have developed, constructed, and managed a variety of complexes from the simplicity of a single family home to residential condominiums, retail plazas, office buildings, and specialty buildings such as a 150 bed skilled nursing facility and a 9,000 square foot fitness center. 

Commercial Real Estate


Check out our current commercial real estate holdings.

Residential Real Estate


Check out our current residential real estate holdings.

Featured Current Availability


CrossPointe North Building

50 Waterbury Road (Route 69), Prospect

1,200 square foot, ground floor, end suite . Additional side entrance/exit with room for an outdoor patio.

Retail/Office/Restaurant - $1,700 per month


4.83 Acres on Route 69 Prospect - For Sale or Lease

  • 4.83 acres on Route 69 in Prospect.
  • Approx 412 feet of frontage on Route 69
  • Approx 335 feet of frontage on Knapp Drive
  • High traffic counts
  • Business Zoned
  • No enviormental issues


Direct Oceanfront House in Milford

  • Direct waterfront, FEMA compliant, custom built house! 5 bedrooms and 4.5 bathrooms. 4 car tandem heated garage. Every level has a waterfront balcony/patio so you will have water views from everywhere in the house. Over-sized windows throughout the house invites the light from sunrise to sunset. High ceilings, beautiful wide plank hardwood floors, and an open floor plan make this house perfect for entertaining. Kitchen features white shaker cabinets, quartz counter tops, tile back splash, and an island open to a large living room with a gas fireplace with stone surround. Master bedroom retreat with spa like bathroom, walk in closet, and full glass sliding doors to its own private deck. Sprawling beach side patio, outdoor shower & more. Part of the Point Beach Improvement Association. Under construction. Estimated to be completed by June 2020. $1,700,000

Contact US

American General Investors, LLC

50 Waterbury Road, Suite G, Prospect, Connecticut 06712

Mailing Address: PO Box 7055, Prospect, CT, 06712 Phone: (203) 758-5180 Fax: (203) 758-0858

Office Hours

Monday - Friday: 9am - 4:30pm

Saturday: Closed

Sunday: Closed

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