Common questions

Yes. Depending on the project, GPJ Residential can help with residential structural/civil engineering, permitting support, repairs, and construction. The right mix depends on the property and scope.

Decks, ADUs, additions, new homes, remodels, structural repairs, retrofits, and related permit support. If you are unsure which category fits, start a project inquiry and we will help point you in the right direction.

Yes. We can help identify a likely permit path, prepare or coordinate permit drawings and calculations, and respond to city comments when that is part of the agreed scope. The city or county makes the final permit decision.

Yes. That includes new decks, repairs, rebuilds, structural upgrades, permit drawings, and construction support.

Yes. ADUs are an important service, including detached units, garage conversions, attached ADUs, junior/interior ADUs, basement or lower-level conversions, and multifamily ADU opportunities. They are one part of a broader residential practice.

Yes. We review existing-condition concerns such as foundation issues, dry rot, deck or balcony repairs, seismic-related upgrades, and unpermitted work, then recommend a practical path.

Yes, when the project or jurisdiction requires them. That can include framing, beams/headers, foundations, and related residential engineering documentation.

Bay Area, California. Send the property address with your inquiry so we can confirm we can help with that jurisdiction.

No. The free ADU screen is a preliminary planning tool based on user-provided information and available public data. It is not permit approval, engineering design, legal advice, or a construction estimate.

Start a project with the property address, project type, and a short description. For ADUs, you can also begin with the free preliminary ADU screen.