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Ask a Pro: Budget Planning for Accessory Structures
How much is this gonna cost me?
Are you in need of a new building for your property? Here’s some budget guidance to help you plan.
First, a standalone backyard office. Whether it’s a quiet nook for remote work or a creative studio, budgets typically range from $20,000 to $50,000. This covers quality materials, insulation, and basic utilities to keep you comfortable.
Next, a detached garage or workshop, including the concrete foundation, can run from $40,000 to over $100,000. The range depends on size, finishes, and features like extra storage, insulation, electrical, and exterior treatments like custom garage doors, masonry or wood detail. You can customize to fit your style and/or budget.
For an ADU (accessory dwelling unit) or casita, think $60,000 to $150,000. These self-contained units are perfect for guests, family, or rental income. They’re complex, with plumbing, electrical, and HVAC needs, but they’re so worth it!
A shed is a simpler project, with costs from $4,000 to $40,000. A basic storage shed is on the lower end, while a custom one with electricity or insulation climbs higher. Size of course is the largest driver of cost.
For a carport, expect $3,000 to $20,000. These range from simple, budget-friendly ways to protect vehicles, to stylish higher-end options that match and complement your home. Pricing varies based on materials and size. A client recently shared how their carport doubled as a shaded gathering spot for summer barbecues—talk about multi-purpose!
Finally, raw land development—think driveways, grading, clearing, and site utilities like septic, well, or electricity—can range from $50,000 to $150,000. This is the foundation of your vision, turning raw land into a canvas for your future.

You’re not alone in this. Lean on your contractor, ask questions, and they’ll help you understand all the



Moore Liberty Buildings • Chad & Amanda MooreThousands of structures built since 2015.MooreLibertyBuildings.com • 512-548-6474