GPJ ResidentialGPJ Residential

Services

Residential Engineering & Construction Services

GPJ Residential provides residential structural/civil engineering and construction services throughout the Bay Area. From decks and ADUs to additions, new homes, repairs, and permit support, we help property owners move from idea to practical next steps.

New elevated residential deck with sturdy framing and code-compliant rails

Decks

New Decks, Repairs & Rebuilds

  • New deck engineering and construction support
  • Deck repairs and structural upgrades
  • Deck replacement and rebuilds
  • Permit drawings and calculations
  • Stairs, guards, railings, framing, footings, and support systems
  • Existing deck condition review
Detached backyard ADU behind a Bay Area home

ADUs

ADU Feasibility, Engineering, Permitting & Construction Support

ADUs are one of the company’s residential project types — an important service, not the only focus.

  • Detached ADUs
  • Garage conversion ADUs
  • Attached ADUs
  • Interior / Junior ADUs
  • Basement or lower-level conversions
  • Multifamily ADU opportunities
  • Permit-path and feasibility review
  • Structural/civil engineering and construction support
Bay Area home with a tasteful residential addition

New Homes & Additions

Engineering and Building Support for Residential Expansion

  • New custom homes
  • Room additions
  • Rear additions
  • Second-story additions
  • Major remodels
  • Wall removals and structural modifications
  • Foundation and framing support
  • Permit drawings and calculations
  • Construction support
Residential structural drawings and project notes on a desk

Structural & Civil Engineering

Residential Engineering for Permits, Repairs, and Construction

  • Structural calculations
  • Foundation design/review
  • Framing design
  • Beam/header sizing
  • Retaining wall support, if applicable
  • Civil/site considerations
  • Drainage and grading coordination, if applicable
  • Permit correction responses
  • Engineering letters/reports when appropriate
Residential deck framing prepared for professional repair

Repairs, Retrofits & Existing Conditions

Practical Solutions for Existing Residential Structures

  • Structural repairs
  • Foundation issues
  • Seismic-related upgrades
  • Dry rot or deterioration repairs
  • Deck and balcony repairs
  • Retaining wall repair support
  • Unpermitted or existing-condition project support
  • Repair recommendations and permit support

Not sure which service you need? Start a project inquiry and we’ll help point you in the right direction.

Start a Project

Have a residential project or structural concern?

Start with a project inquiry. Tell us what you are planning, where the property is located, and what kind of help you need.

Start a Project