Multifamily

Multifamily Electrical Design for Permit-Ready Apartment & Mixed-Use Projects

Electrical design support for multifamily owners, developers, architects, and electrical contractors across WA, OR, ID, and NV.

Architect-style visual of a finished multifamily project with electrical service infrastructure

Commercial practice

Multifamily electrical design for apartment and mixed-use permit packages.

Multifamily projects are supported with service sizing, unit and common-area design, feeders, panel schedules, one-lines, and permit-level coordination.

Permit drawingsLoad calculationsOne-linesPanel schedules

Common scope items

  • Dwelling unit power layouts
  • House panel and common-area power
  • Service and feeder sizing
  • One-line diagrams
  • Panel schedules
  • Load calculations
  • Lighting and controls coordination
  • Mechanical/plumbing equipment connections

Project types

  • Garden-style apartments
  • Townhomes and stacked flats
  • Mixed-use residential shells
  • Small multifamily infill projects
  • Apartment service upgrades
  • Common-area improvements
  • EV-ready multifamily infrastructure
  • Permit correction packages

Deliverable approach

Practical engineering focused on permit approval and constructability.

Each proposal confirms the exact drawing sheets, calculations, code basis, exclusions, owner/contractor inputs, schedule, and permit review response support.

Common questions

Electrical engineering questions for this scope.

What is included in a multifamily electrical design package?

A typical package may include unit power layouts, common-area power and lighting, house panels, service sizing, feeder design, one-line diagrams, panel schedules, load calculations, notes, and permit response support.

What project inputs are needed to start?

The most useful inputs are architectural backgrounds, unit mix/counts, site plan, utility/service information, mechanical and plumbing equipment schedules, EV requirements, and the target permit date.

Can the design support contractor-led design-build work?

Yes. The engineering package can be scoped around the contractor’s preferred equipment, service strategy, constructability assumptions, and permit timeline.

Do you support multifamily projects outside Washington?

Yes. Multifamily electrical engineering support is available in Washington, Oregon, Idaho, and Nevada when the project scope fits the firm’s electrical competency.

Request a proposal

Send the project basics and get a fixed-fee scope.

Share the project type, location, schedule, available drawings, equipment information, and what needs to be permitted.

Prefer email? casey@pnwengineer.com · (443) 742-7054