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& Altheim & Sons ELECTRICAL CONSULTANTS · NYC

Detailed load calc for your order

List every appliance in the home, each mini-split and heat pump, and upload your drawings, cut sheets and panel photos. The numbers update as you type; we check every line before anything is delivered.

1. Project

2. Building and service

3. Appliances and equipment

Enter what is on the nameplate (watts, kW, amps or horsepower). Don't know it? Pick Not sure and upload a photo of the label or the cut sheet: we read it from there. Gas appliances are listed so we know they are not electric.

ApplianceQtyRatingUnitVolts

Not in the list? Pick "Other (type a name)".

4. Drawings and documents

Your reference: . Put it in the upload name or email subject so we match your files.

  • Architectural plans: we take the square footage from them
  • Mechanical / HVAC schedules (mini-splits, heat pumps, air handlers)
  • Cut sheets / submittals for appliances and equipment
  • Nameplate photos of anything marked "Not sure"
  • Panel photos: the existing panel, its label and the meter
  • Plumbing or sprinkler drawings, if they affect the electrical work

5. Your load calculation

6. What do you need?

For comparison, one NYC engineering firm advertises stamped service-upgrade drawings starting at $1,500 (checked October 2026). Homes and small buildings don't need DOB electrical plan review, so your licensed electrician files the work and you don't pay for a stamp.

7. Send your project

We usually reply with your fixed price within one business day. Ordering and payment open ; nothing is charged today.