Short answer

ADUs, additions, and ground-up projects all depend on accurate plans and layout, but additions place more pressure on new-to-existing tie-ins while detached and ground-up work usually demand more logistics and full-building sequencing.

01 / Framing

ADU framing starts with site logistics

A detached ADU may be compact, but it can have limited side-yard access, tight staging, shared utilities, and an occupied primary residence nearby. Delivery sizes, lumber storage, waste removal, and protection should be planned before production begins.

Attached and conversion ADUs add another layer: existing walls, floor elevations, roofs, and utility routes must align with the approved scope. Selective opening or field measurement may be needed before finalizing the sequence.

02 / Framing

Additions are defined by the tie-in

The new framing has to meet existing construction at floors, walls, roofs, and exterior assemblies. Actual dimensions and conditions may differ from assumptions made before demolition or exposure.

A useful addition plan identifies what can be verified early, what becomes visible later, and who will resolve structural or design conflicts. Temporary weather protection and occupied-home separation also need ownership.

  • Existing floor and roof elevations
  • New-to-existing wall alignment
  • Openings and temporary protection
  • Utility routes through retained construction

03 / Framing

Ground-up work requires whole-building sequencing

New construction offers fewer hidden tie-ins, but the framing package is larger and more dependent on foundation readiness, material flow, crane or equipment access when applicable, and the sequence of floors, walls, roof, and sheathing.

Window and door openings, structural hardware, stair geometry, mechanical zones, and exterior transitions should be checked as the building develops—not only at the end.

04 / Framing

One planning standard works across all three

Use the current documents, verify the field, identify decision owners, and plan adjacent trades before they are waiting. A detailed handoff between foundation, framing, rough trades, windows, exterior work, and drywall is more valuable than treating each scope as an isolated crew date.

Structural and code-specific decisions should be confirmed with the project’s qualified professionals and reviewing agency.

Field checklist

Information that improves a framing review

  • Project type: detached ADU, attached ADU, addition, or new building
  • Current approved plans and structural details
  • Known existing conditions and demolition status
  • Property access, staging, and occupancy constraints
  • Desired sequence for windows, rough trades, and enclosure
  • Permit and inspection status

Framing FAQ

Questions project teams ask

Is an ADU framing scope automatically simpler than a house?

No. The building may be smaller, but tight access, shared utilities, existing structures, and compact mechanical layouts can make coordination demanding.

Why are addition tie-ins difficult to price early?

Existing elevations, concealed damage, previous alterations, and actual framing conditions may not be fully known until selective demolition or field verification occurs.

Can the same crew frame wood and metal partitions?

Crew capabilities and the project scope must be confirmed directly. Wood structural framing and nonstructural metal framing can involve different details, tools, sequencing, and project requirements.