The Alder ADU Plan
The Alder ADU Plan
The Alder ADU Plan is a compact 2-bedroom, 1-bathroom backyard home with a clean modern farmhouse look and a practical single-level layout. It is designed for homeowners who want a real second dwelling on their property without creating a structure that feels oversized or out of place.
The main living area combines the kitchen, dining, and living room into one open space, making the home feel larger than its footprint. The kitchen is sized for everyday use, with room for an island and direct connection to the dining area. The living room sits toward the front porch, giving the home a welcoming feel and a strong connection to the outside.
The primary bedroom is tucked toward the quieter side of the plan, while the second room can work as a guest bedroom, office, studio, or flex space. This makes the plan useful for a wide range of needs, including rental housing, multigenerational living, a guest house, or a work-from-home setup.
The exterior keeps the design simple and residential, with board-and-batten siding, a gabled roof, covered entry, and warm wood accents. It has enough character to stand on its own, but it is restrained enough to fit behind an existing home or within an established neighborhood.
Built on a slab-on-grade foundation with a straightforward roof form, the Alder ADU is intended to be efficient to build and easy to place on typical backyard or infill sites. It offers the comfort of a small home, the flexibility of a second bedroom, and the curb appeal of a modern cottage.
What's Included in This Plan Set
-
Architectural drawings — Floor plans, elevations, building sections, and roof plan.
-
Structural drawings — Foundation plan, framing plans, and structural details.
-
Electrical layout — Schematic electrical plan for permitting reference.
-
Site plan template — A blank site plan diagram sized for the intended lot width — your surveyor or civil engineer fills in your specific lot data.
-
Energy compliance notes — General energy code compliance notes for most U.S. jurisdictions.
-
Format — Print-quality PDF, delivered immediately at checkout. Files are 24" × 36" sheet size, standard for print shops and permit submissions.
Plan Specifications Table
| Specification | Value |
| Plan Name | The Cottage ADU Plan — V1 |
| Bedrooms | 1 |
| Bathrooms | 1 full |
| Total Living Area | 870 sq ft |
| Width | 27 ft |
| Depth | 41 ft |
| Stories | 1 |
| Garage | None |
| Foundation Type | Slab |
| Architectural Style | Modern Farm House |
| ADU Option | Included (Stand-alone ADU) |
| Sheet Count | 9 sheets |
| File Format | PDF (print-ready, 24" × 36") |
| License | Single-build license — one permitted structure |
Drawings are delivered digitally via email within minutes of your purchase.
All Infill Plans products are digital downloads. Because our plan sets, CAD files, and related documents contain intellectual property that cannot be physically returned once delivered, all sales are final.
Once a digital file has been purchased, accessed, downloaded, or delivered, we are unable to offer returns, exchanges, or refunds. By completing your purchase, you acknowledge that you are receiving digital intellectual property and that the product cannot be “returned” in the same way as a physical item.
We encourage all customers to carefully review the plan description, square footage, included drawings, licensing terms, and product options before purchasing. If you have questions about whether a plan is appropriate for your project, property, or jurisdiction, please contact us before placing your order.
If there is a technical issue with your download, such as a missing file, corrupted file, or incorrect file delivery, we will make reasonable efforts to correct the issue and provide the proper digital files.
Purchase of a plan does not guarantee permit approval. All plans must be reviewed by the local authority having jurisdiction and may require site-specific modifications, engineering, energy code compliance documentation, or review by a licensed professional in the project jurisdiction.
