Custom sheds built on site in Shelton & Mason County
Your shed should work for your property and feel at home beside it. ShedPros designs and builds custom sheds and accessory buildings on site for homeowners in Shelton and throughout Mason County, with one local team coordinating the design, ground preparation, foundation and construction.
Start My Shed Plan · Explore Our Custom Projects
Built around your home and the way you use the space
Start with what you need to store, the room you want to create and the details you want to match. Roof shape, siding, trim, doors and windows all affect how a building looks and works. We help bring those choices together with a practical layout and a construction plan suited to your site.
Our Mason County work includes Bill’s shed project in Shelton and Joe’s Mason County project. These are real ShedPros projects—not stock examples of what might be possible. Our selected 2026 work also includes a 12×30 Baker Homestead in Shelton and 10×10 and 12×20 Rainier Homestead buildings in Mason County.
On-site construction, including difficult-access yards
Custom on-site construction is our core service. We bring the materials and build the shed where it will stay. That gives us flexibility when a finished building cannot pass through a gate or between existing trees and structures.
Access still matters: we plan how materials, tools and the crew will reach the work area, where construction can take place and how to protect the surrounding property. Share photos of gates, slopes and the proposed location when you contact us. Our site preparation and access guide explains the conditions we review before work begins.
A solid plan for site preparation and foundations
A well-built shed starts below the walls. We consider ground conditions, drainage, leveling and the support the building needs before construction. Depending on the property and project, the scope may include ground preparation, a gravel pad or other appropriate foundation support.
We plan the building and its base together rather than treating the foundation as an afterthought. Read our shed foundation and gravel pad guide, then tell us about standing water, uneven ground or an existing shed or foundation at your site.
Planning a shed in Shelton or elsewhere in Mason County
Tell us your general location, intended use, approximate size and desired timing. We will discuss your property, design priorities and the scope of work. Permit, setback and HOA requirements depend on the property, jurisdiction, building size and intended use; confirm the applicable requirements before construction. Our permit and setback guide outlines useful questions to ask.
We also serve nearby Thurston County homeowners in Olympia, Lacey and Tumwater. If you are unsure whether your property is within our service area, share the location with your project inquiry.
One team from the first plan through cleanup
We agree on the design and scope, prepare the site and foundation, coordinate on-site construction and installation, and clean up the work area. Clear communication and care for your property are part of the job throughout.
Explore our custom shed construction and site preparation services and planning-to-completion process, or see the details in Bill’s Shelton project and Joe’s Mason County project.
Plan your Mason County shed
Bring us your ideas, a few site photos and the home details you want to complement. We will help identify a practical next step for your custom building.
Start My Shed Plan or call or text (360) 323-PROS.