Boxabl Baby Box 120: Site Prep & Anchoring
Model BXB-000029 — the 120 sq ft towable unit built to NFPA 1192 RV code, arriving on wheels in late 2026.
Key Specs for Foundation Design
Square Footage
120 sq ft
Footprint
101" x 168" building footprint
Configuration
Towable Studio (RV)
Weight
GVWR 6,400 lbs; unit weight 4,400 lbs — towable by a properly rated pickup
What the Baby Box Actually Needs
The Baby Box is an RV (NFPA 1192), not a modular building — by default it does NOT require a permanent foundation. It levels on integrated jacks on firm, level ground.
A compacted gravel pad or concrete pad protects the leveling points and keeps the unit stable and dry — cheap insurance versus parking on soil.
The factory wind rating is 75+ mph (Exp B/C). If you're siting it long-term — especially in open or coastal exposure — engineered tie-down anchoring to ground anchors or a pad is the upgrade that protects the investment.
Want it treated as real property (for financing, insurance, or resale)? That requires an engineered permanent foundation and certification — the same pathway used for manufactured homes, and a service we provide.
Approval status: Built to RV standard NFPA 1192 — siting rules follow local RV/park-model rules rather than the modular building pathway. Long-term backyard siting varies by jurisdiction.
Baby Box FAQs
Does the Baby Box need a foundation?
Not by default — it's an RV on an integrated chassis with leveling jacks. It needs firm, level ground; a gravel or concrete pad is recommended. Tie-down anchoring is smart for long-term siting in windy regions, and a permanent engineered foundation is required only if you want it reclassified as real property.
Can I live in a Baby Box in my backyard?
Depends on local rules: many jurisdictions treat long-term RV occupancy differently than ADUs. Some allow it outright, some require an ADU permit path, some prohibit it. Our site feasibility report answers this for your specific parcel.
Can a Baby Box become real property for financing?
Yes — the established path is installing it on a permanent, engineered foundation and obtaining a PE certification (same concept as HUD manufactured-home foundation certs). We provide both the foundation plans and the certification letter.
We provide foundation engineering only — Boxabl units are sold separately by Boxabl Inc. Specs above reflect Boxabl's published documentation and may change; always confirm current specs with the manufacturer.