Treat the connection as the project
The transition between old and new is where layout, structure and finish details matter most.
JBC CAPABILITY
Home Additions
An addition has to do more than create square footage. It must connect circulation, structure, rooflines, utilities, exterior massing and interior finishes with the existing house. JBC coordinates those relationships from planning through construction.
ONE TEAMDesign intent connected to field execution.
LICENSEDCalifornia CSLB #982238
LOCALInland Empire + Greater Los Angeles
SCOPE
What JBC can coordinate.
01
Feasibility and scope planning
02
Existing-home documentation
03
Addition design
04
Structural coordination
05
Permit support
06
Foundation and framing
07
Systems tie-ins
08
Interior and exterior finish integration
PLANNING PRINCIPLES
Design the decisions before construction has to solve them.
Plan utilities early
Electrical, plumbing and HVAC impacts should be coordinated with the addition design.
Protect the existing home
Sequencing, access and temporary conditions should be considered before construction starts.
COMMON QUESTIONS
Home Additions FAQ
Can JBC design and build an addition?
Yes. Additions fit the design-build model because architecture, structure and construction need tight coordination.
Will an addition require permits?
Substantial additions generally require local review and permits. Exact requirements depend on the property and jurisdiction.
Can an addition be designed to feel original to the home?
That is a central design goal: rooflines, openings, materials, proportions and interior transitions can be coordinated so the expansion feels intentional.
Planning home additions?
Tell JBC what you are planning, where the property is located and what you want the finished space to do.