# Jinjiama Prefab Housing > Engineered Prefabricated Expandable Steel Container Homes & Backyard ADUs. Precision-Engineered 20ft Expandable Living — Turnkey, Relocatable & Resilient - Turnkey Base Price: $22,000 - Living Area: 398 sq ft (37.0 m²) - Bedrooms / Bathrooms: 2 Bedrooms, 1 Full Bathroom (Wet/Dry Separation) - Deployed Footprint: 5,900 mm L × 6,300 mm W × 2,480 mm H (19.4 ft × 20.7 ft × 8.1 ft) - Folded Shipping Dimensions: 5,900 mm L × 2,200 mm W × 2,480 mm H (Standard 20ft Shipping Envelope) - Framing: High-tensile welded steel structural chassis with ISO container corner castings - Insulation: 50mm-75mm high-density thermal insulated composite wall and ceiling panels - Glazing: Broken-bridge aluminum insulated double-glazed windows (5+9A+5) - Manufacturer Warranty: 1-Year Manufacturer Structural & Component Warranty - Electrical: 110V / 60Hz US Standard Pre-Wired Outlets, LED Fixtures, and Main Panel - Plumbing: Factory pre-installed PEX hot/cold plumbing and PVC drainage lines ## Key Pages - [Models & Specifications](https://jinjiamahomes.com/models.html): Complete dimensional drawings, inclusions, and structural specs. - [Factory Upgrades](https://jinjiamahomes.com/upgrades.html): R-30 insulation, 18k BTU mini-splits, 5kW solar packages, and pricing calculator. - [Backyard ADU Guide](https://jinjiamahomes.com/adu.html): State-by-state permitting (SB9, AB68), zoning setbacks, and rental income models. - [Airbnb & Short-Term Rental](https://jinjiamahomes.com/airbnb.html): Vacation rental revenue estimator, glamping hospitality layouts, and ROI. - [Off-Grid Living](https://jinjiamahomes.com/off-grid.html): Self-contained solar, battery storage, water bladders, and composting toilets. - [Delivery & Foundations](https://jinjiamahomes.com/delivery.html): Pier, grade beam, and slab foundation guidelines, freight logistics, and crane rigging. - [Quote Request & Consultation](https://jinjiamahomes.com/contact.html): Custom proforma quote requests with freight estimates to customer ZIP code.