Home Addition at Glenfinnan Way, San Jose, CA 95122

Project Gallery

This home addition at Glenfinnan Way in San Jose, CA 95122 added meaningful square footage to an existing residence — meaningful because additions only justify their cost when they solve a real lifestyle problem (a missing bedroom, an undersized kitchen, a home office shortfall) rather than just adding generic floor area. The Glenfinnan Way build was designed around specific homeowner needs that the existing house couldn't meet.

San Jose addition permits require foundation engineering tied into the existing home, structural framing that completes a continuous load path, Title 24 energy compliance for the new envelope, and inspections through every framing, mechanical, insulation, and finish stage. Stitching new construction into an existing house requires care at the connection points to avoid future settling, water intrusion, or thermal performance gaps.

The scope covered foundation extension matched to the existing footprint, structural framing aligned with the original house's load paths, exterior siding and trim selected to read as coherent with the existing home rather than a visible bolt-on, mechanical and electrical extension into the new space, insulation and Title 24-compliant envelope detailing, and interior finishes that complete the addition's integration.

Browse the photo gallery below to see the foundation, framing, and finished addition on this San Jose property.

Project Gallery

Arrival at the Job Site

9Builders Site Sign with Framing Materials

Beginning of Concrete Pour Over Vapor Barrier

Close-Up of Concrete Placement and Rebar Grid

Team Working Alongside the House to Pour Concrete

Pouring Concrete Across the Prepared Foundation Grid

On-Site Supervisor Overseeing Concrete Work Progress

Finishing Concrete Pour Near the Front Entrance

9Builders: Framing the New Roof Structure for a Home Addition

9Builders: Under Construction – Roof Trusses Taking Shape

9Builders: Framing the Walls and Roof for a Spacious Home Expansion

Framing in Progress – Starting the Structure for the ADU Addition

Interior Framing – Trusses and Wall Framing Ready for the Next Phase

Interior Framing Work – Clean Setup and Preparation for Windows and Doors

Exterior Framing Close-Up – Adding Roof Support and Finalizing Structure

Framing Completed – Framing for Windows and Doors Nearing Completion

Roof Sheathing – Preparing for the Final Roof Layer

Roof Structure – Securing Sheathing and Preparing for Roofing Materials

Framing Final Touches – Interior Framing with Worker Progress

Ready for Finish – Exterior Framing Completed and Ready for Next Steps

Exterior Framing – Final Adjustments Before Roofing and Siding Installation

Framing Setup – Workers Fine-Tuning the Structure Before Final Inspection