Altheim & Sons Electrical Consultants

1. Project

Street address

Borough

ZIP code

You are

Type of work

We serve the five boroughs of New York City. Every calculation follows the 2025 NYC Electrical Code (based on NEC 2020, in effect since December 21, 2025).

2. Building

One-familySingle dwelling Two-family2 dwelling units Three-family3 dwelling units Multifamily4 or more units

Living area per unit (sq ft)

Service

Existing service (if any)

3. Appliances (per unit)

Don't know the size? Pick "Not sure" and we use the code minimum.

Cooking (range, cooktop, oven)

Clothes dryer

Water heater

Appliances fastened in place (tick all that apply)

Dishwasher Disposal Built-in microwave Washer / laundry in the unit

Anything else fastened in place (VA)Hot tub, well pump, sump pump, etc. 0 if none.

4. Heating, cooling and EV (per unit)

Heating

Central / split A/C (kW)0 if none or if heat pump covers it

EV chargers

EV charger size

5. Your load calculation

Preliminary, for consulting purposes only. Calculated per the 2025 NYC Electrical Code (NEC 2020 Article 220) from the information you entered. A licensed electrician must verify it before equipment is ordered or work is filed. Utility requirements may change the result.

6. What do you need?

Engineer-stamped service-upgrade packages can start at ~~$1,500~~. You don't need a stamp when your licensed electrician files, so you don't pay for one.

Load calc, reviewedYour NEC 220 calc checked by our team, signed PDF. Answers "is my service big enough?" RecommendedService upgrade packageEverything in the reviewed calc + riser / one-line + panel schedule(s). What most service upgrades need to file. Full electrical plan setEverything in the service package + power and lighting layouts, up to 3 sheets.

Just the instant report PDF (), credited in full if you upgrade within 30 days.

Add-ons

EV charger / heat pump / solar-ready sheet Coordinate with mechanical drawings Coordinate with plumbing drawings Coordinate with sprinkler drawings Express (24 to 48 h)

Reserve as-built drawings for the end of the job
When the work is done, send us photos of the marked-up plans, the panel schedules and anything that moved. We update the set to match what was built. Priced after we see your markups, nothing charged today. Full plan set and service package clients only.

Extra sheets beyond package

7. Your quote

Plan-examiner comments? Fixed free.For 90 days on the original scope.

Changed your mind?One round of your own changes free within 14 days.

Price lockedThe price you see is the price you pay. No hourly billing.

NYC load calcs and electrical plans. Free calc in 5 minutes.

How big a service do you need?

How it works

Tell us about the building

See your load calc now

Pick a package, see the price

Get your drawing set

Start a project