Room Additions (B05)
Room additions are complex projects requiring foundation work, structural engineering, and seamless integration with existing construction.
This BidScope guides you through addition types – bedroom additions with closets and egress windows, bathroom additions with plumbing venting and waterproofing, family room additions with open concepts, and sunroom additions with window walls and thermal considerations.
Master foundation options: slab-on-grade for simple additions, crawl spaces matching existing homes, or full basements for maximum space.
Navigate Utah’s frost depth requirements (36-48 inches depending on location and soil type) to prevent foundation heaving.
Understand structural engineering for load transfer – how new construction ties into existing without compromising either structure.
Learn roof tie-in methods: valley connections, extended ridge beams, or independent roof systems.
Match existing finishes inside and out for seamless integration.
Calculate HVAC needs – when existing systems can be extended versus when upgrades are required.
Assess electrical panel capacity for additional circuits.
Plan plumbing extensions and vent sizing.
Budget realistically at $150-300 per square foot depending on finish level and complexity.
What’s Included:
- Addition types and space planning (bedroom, bathroom, family room, sunroom)
- Foundation options comparison (slab-on-grade, crawl space, full basement)
- Pros and cons of each foundation type for additions
- Utah frost depth requirements by location (36-48 inches)
- Frost-protected shallow foundation (FPSF) options
- Foundation tie-in to existing structure
- Structural engineering requirements for load transfer
- Beam and header sizing for connecting walls
- Roof connection methods (valley tie-in, extended ridge, independent)
- Matching existing exterior finishes (siding, brick, stone, stucco)
- Matching existing interior finishes (flooring, trim, textures)
- HVAC load calculations for additional space (Manual J)
- HVAC system extension vs upgrade decisions
- Ductwork routing and sizing
- Electrical panel capacity assessment
- Circuit planning for addition
- Plumbing system extension planning
- Vent stack sizing and placement
- Insulation and energy code compliance (current codes for new work)
- Window and door selection matching existing
- Permit requirements and fees by municipality
- Building department plan review process
- Budget considerations ($150-300/sq ft typical range)
- Timeline planning and phases
- Living in home during construction
- Minimizing disruption
