---
title: "Nielsen Electric"
description: "Nielsen Electric says on its own website that it has been in business for 35 years. A 2024 Google customer praised a very prompt response and said they wou"
doc_version: "2026-10-19"
last_updated: "2026-10-19"
---

# Nielsen Electric

**Trade:** Electrical · **Address:** 18 Cassidy St, Greenwich, CT 06830 · **Phone:** (203) 552-9829 · **Website:** https://www.nielsenelectricllc.com/ · **Languages:** English

**Rating: 3.3/5** (low confidence) — from 1 reviews across 6 sources.

## The honest read

Nielsen Electric says on its own website that it has been in business for 35 years.

A 2024 Google customer praised a very prompt response and said they would recommend the company.

It holds an active Connecticut E1 electrical contractor licence, ELC.0123573-E1, under Mark R Nielsen.

**Strengths:**
- Prompt response — a 2024 customer praised a very prompt response

## Claims & citations

Every claim below is backed by real evidence rows — uncited claims are dropped in code before publication.

- Says it has been in business for 35 years _(confidence: medium)_
  - [Official Website](https://www.nielsenelectricllc.com) — “Self-reported 35 years in business”
- A 2024 Google customer praised a very prompt response and recommended the company _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUN0eXJfWldBEAE!2m1!1s0x0:0x38e226073e413f8d!3m1!1s2@1:CIHM0ogKEICAgICtyr_ZWA%7C%7C?hl=en-US) — “5★ Very prompt response and really great service.  I would highly recommend!”
- 5 stars from 6 Google ratings _(confidence: medium)_
  - [Google](https://www.google.com/maps/search/?api=1&query=Nielsen%20Electric&query_place_id=ChIJg65fKj-YwokRjT9BPgcm4jg) — “Google: 5★ from 6 ratings”
- It holds an active Connecticut E1 electrical contractor licence, ELC.0123573-E1, under Mark R Nielsen. _(confidence: high)_
  - [State License Registry](https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx) — “CT electrician license ELC.0123573-E1 registry-verified active — registry holder of record: MARK R NIELSEN”
- Specializes in Electrical _(confidence: medium)_
  - [BuildZoom](https://www.buildzoom.com/contractor/mark-nielsen-greenwich-ct) — “Licence listed on BuildZoom: ELC.0123573-E1 (Electrical Unlimited Contractor, Connecticut; BuildZoom lists it Active, issued 10-01-2026 — Bu…”

## License

Status: **active** (#ELC.0123573-E1, electrician) — verified against the official CT state registry on 2026-10-19, never self-reported.
Re-check at the official registry: https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx

## Sources

- [Google](https://www.google.com/maps/search/?api=1&query=Nielsen%20Electric&query_place_id=ChIJg65fKj-YwokRjT9BPgcm4jg): 5.0★ from 6 ratings
- [Official Website](https://www.nielsenelectricllc.com): 35 yrs in business · Self-reported profile and service details
- [Google Reviews](https://www.google.com/maps/search/?api=1&query=Nielsen%20Electric&query_place_id=ChIJg65fKj-YwokRjT9BPgcm4jg): Listed on this source
- [BuildZoom](https://www.buildzoom.com/contractor/mark-nielsen-greenwich-ct): Listed on this source
- [Local News](https://www.ccjdigital.com/trucks/article/15051357/daimler-delivers-its-first-electric-em2-truck-to-penske): Listed on this source
- [Reddit](https://www.reddit.com/r/MortonFeldman/comments/1odrzpf/morton_feldman_for_bunita_marcus_jesper_nielsen/): 0 community mentions discussing this business

## Recent reviews

- **5/5 · Google Reviews · Anne Birchenough · 2024-01-30**: Very prompt response and really great service.  I would highly recommend!

---

Data freshness: last scanned 2026-10-13T08:40:04.885Z.
Cite as: Nielsen Electric — Tavlee (https://tavlee.com/contractor/nielsen-electric-greenwich)
Source: https://tavlee.com/contractor/nielsen-electric-greenwich

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