| A&B Barns | | Specializing in the providing the design and materials for horse barns, riding arenas, run-in sheds and other agricultural buildings. |
| A.M. Warkup | | British pig housing manufacturer and supplier with export services available throughout Europe and Asia. |
| A1 Steel Buildings Inc. | | Manufactures and erects steel buildings for livestock shelters, equipment storage and living units. |
| AG Developers, Inc. | | Specializing in post frame construction and custom designed buildings in the Northwest United States. Based in Redmond, Oregon. |
| Allen Fabrications Ltd. | | Suppliers of steel framed buildings for the agricultural, equestrian, and industrial sectors. UK. |
| AmeriStall | | Horse barn and metal building manufacturer offering a variety of designs and styles. |
| B And V Enterprises | | Specializing in steel buildings, pole barns and corrals, horse arenas, and utility and horse trailers. |
| Baldock Barns | | Pole barn specialist serving Kentucky and Tennessee. |
| Barn Plans | | Offering AutoCAD drawn barn plans with the owner/builder in mind. Blueprints for barns from 16 to 32 feet wide, and from 24 to 60 feet long. |
| Barn Pros, Inc. | | Custom built wood horse barns, loafing sheds and garages incorporating pole style construction. |
| Barnmaster Barns | | Modular prefabricated barns designed by horsemen for horsemen. Horse barns of various designs, accessories, corrals, round pens, garages and hay barns. |
| Barns & Stables LLC | | Master barn and stable builders for the Southeast United States. Variety of styles plus modular designs. |
| Barns, Shelters and Sheds | | Dealer and installer of custom grill work, doors, stall fronts, fencing, barn hardware and accessories. |
| BayHorse | | Amish-made barns, sheds, gazebos, and hand-crafted furniture. |
| Blue Chip Structures Inc. | | Sells building materials to construct equestrian, agricultural, commercial and storage facilities for wood framed structures. |
| Broadfield Stables | | Manufactures and erects stables, field shelters and timber out buildings. Profile, product range, and prices with specifications and testimonials. |
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