CAST Architecture

Cedar Cottage

1 bed (with 2 bed option) • 467 sq ft • $1,000 to license

Accessibility: The Cedar has living on one level, flush entry thresholds and flooring transitions, galley kitchen and a generous central entry that connects to all spaces.

Low cost: Standard wood frame construction, vented shed roof, careful placement of windows, and a simple exterior allow for low cost construction without sacrificing durability, function or style.

Family friendly: One-bedroom plan works well for parent aging in place, with a two-bedroom version for additional study, or household with children.

Privacy: Careful opening placement allows for privacy on three sides, with a covered open patio as the indoor outdoor focus of the living space.Green Building: The design is targeting Built Green 4 Star; reduced air infiltration; energy efficient heating; cooling and water heating systems; passive solar heat gain in window/shading in summer; low-VOC, recycled and renewable materials; no fossil fuel appliances; and all-LED lighting.

Floor plan of one-bedroom Cedar Cottage

Floor plan of two-bedroom Cedar Cottage

Cutaway section of Cedar Cottage

Cedar Cottage

Cedar Cottage

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Budgeting for upfront costs

  • Pre-approved plan license: $1,000

  • Site evaluation and preliminary site plan: $500-750

  • Site-specific foundation engineering: $1,000-$1,500

  • Site-specific permit documents: $2,000-4,000

  • Required forms: $500

Additional costs

  • Survey: Coordinated directly by owner, estimated $2,500-$3,500, required when structure is proposed within two feet of required building setbacks.

  • Geotechnical & stormwater: Coordinated directly by owner, varies by site

  • Arborist: Required if large trees would be impacted by construction

  • Built Green certification & verification: $1,700, required if you already have an ADU on the property; optional otherwise.