14 West St. Douglas, MA 01516

(508) 476-1500


Guaranteed Builders & Developers, Inc. is a full-service modular home and garage builder located in Douglas, Massachusetts. 

Our model home and garage display -- located at 138 Main Street, Douglas -- is the largest in New England.  We are open Monday through Friday 10am to 6pm, Saturdays and Sundays 10am to 4pm. 

We offer modular home plans from Professional Building Systems, Inc. based in Pennsylvania.  PBS has been building modular homes since 2000 and has grown to become one of  the largest manufacturers on the East Coast.  We build ranch, cape, and two-story homes as well as apartment buildings, dormitories, townhouses and commercial structures.

We have several models of stick-built garages to choose from.  Starting with the standard model, GBI can customize your structure to your exact needs and wants, including single and two-story options.  Garages can be built as a detached unit or attached to your home with or without a breezeway.  Garages are stick-built on-site with pre-engineered trusses on top with high quality materials throughout the building.  Matching the existing roof line and exterior of your home is possible.

For customized garage projects, we offer free in-home consultations.  We begin the garage design process with a quick call to discuss your preliminary ideas so our sales representatives can prepare options and ask the right questions.  We are always up-front with our prices, and start the design process by giving you a ballpark estimate. We always want our customers to be aware of the total cost as we customize each garage. Just because it’s your dream garage doesn’t mean it needs to have a sky-high price!

When our Construction Supervisors visit your home, they will measure the plot, discuss style and size of garage options optimal for your space, and supply siding and garage door samples.  A formal quote will be provided after the visit.

For our homebuilding process, sales representatives are always happy to meet with you to discuss your modular home needs.  Prices vary depending on options, finishes and site conditions. Please complete the form below to be in touch with a sales representative, who can provide you with information to begin your project within two to three business days. 

If your needs are immediate and you have land, call us at 508-476-1500.  We would be happy to set up an appointment for you to meet with a member of our sales team.