Engineering activities for technical building equipment companies in Ratingen

Ratingen ·Currently listed companies in the Engineering activities for technical building equipment industry headquartered in Ratingen.

17 companies

AE & E Deutschland GmbH GmbH · HRB 63558 Düsseldorf (Dusseldorf) · 2004
983c414892…
AE & E Inova GmbH GmbH · HRB 63407 Düsseldorf (Dusseldorf) · 2004
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Angerland Akustik Bau GmbH + Co. KG GmbH & Co. KG · HRA 15617 Düsseldorf (Dusseldorf) · 2000
e44fac5958…
Aust Ingenieure GmbH GmbH · HRB 50883 Düsseldorf (Dusseldorf) · 2004
38d866615c…
Brand Energy & Infrastructure Services GmbH GmbH · HRB 67829 Düsseldorf (Dusseldorf) · 2006
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Brix Engineering GmbH GmbH · HRB 104726 Düsseldorf (Dusseldorf) · 2024
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E-S Engineering Services GmbH GmbH · HRB 75928 Düsseldorf (Dusseldorf) · 2015
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ESV Ingenieurgesellschaft mbH GmbH · HRB 109343 Düsseldorf (Dusseldorf) · 2021
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etaplan GmbH GmbH · HRB 66756 Düsseldorf (Dusseldorf) · 2011
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Ewex - Engineering GmbH & Co. Kommanditgesellschaft für technische Konstruktionen GmbH & Co. KG · HRA 15466 Düsseldorf (Dusseldorf) · 1989
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Fluor GmbH GmbH · HRB 40398 Düsseldorf (Dusseldorf) · 2001
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GAL Ventilation GmbH GmbH · HRB 104358 Düsseldorf (Dusseldorf) · 2024
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H+R Engineering GmbH GmbH · HRB 61448 Düsseldorf (Dusseldorf) · 2009
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KRISHAM Engineering GmbH GmbH · HRB 104689 Düsseldorf (Dusseldorf) · 2024
1441038259…
UGS Europe GmbH GmbH · HRB 107623 Düsseldorf (Dusseldorf) · 2025
a69412ccc8…
we can! construction services GmbH GmbH · HRB 110416 Düsseldorf (Dusseldorf) · 2025
33e982145a…
Weiss Gebäudetechnik GmbH GmbH · HRB 99975 Düsseldorf (Dusseldorf) · 2018
d7e43dbd2d…

All industries in Ratingen

Live API

GEThandelsregister.ai/api/v1/search-organizations

?limit=20

&filters={"city":"Ratingen","industry_code":"71.12.3","industry_scheme":"WZ2025"}

# pip install handelsregister
from handelsregister import Handelsregister

client = Handelsregister(api_key="YOUR_API_KEY")  # or set HANDELSREGISTER_API_KEY
page = client.search_organizations(
    filters={
        "city": "Ratingen",
        "industry_code": "71.12.3",
        "industry_scheme": "WZ2025"
    },
    limit=20,
    skip=0,
)
print(page["total"])
for item in page["results"]:
    print(item["name"], item["registration"]["register_number"])

// npm install handelsregister
import { Handelsregister } from 'handelsregister';

const client = new Handelsregister('YOUR_API_KEY'); // or set HANDELSREGISTER_API_KEY
const page = await client.searchOrganizations({
  filters: {
      "city": "Ratingen",
      "industry_code": "71.12.3",
      "industry_scheme": "WZ2025"
  },
  limit: 20,
  skip: 0,
});
console.log(page.total);
for (const item of page.results) {
  console.log(item.name, item.registration.register_number);
}

// npm install handelsregister
const { Handelsregister } = require('handelsregister');

const client = new Handelsregister(process.env.HANDELSREGISTER_API_KEY);
(async () => {
  const page = await client.searchOrganizations({
    filters: {
        "city": "Ratingen",
        "industry_code": "71.12.3",
        "industry_scheme": "WZ2025"
    },
    limit: 20,
    skip: 0,
  });
  console.log(page.total);
  for (const item of page.results) {
    console.log(item.name, item.registration.register_number);
  }
})();

curl 'https://handelsregister.ai/api/v1/search-organizations?limit=20' \
  -H 'x-api-key: YOUR_API_KEY' \
  -G --data-urlencode 'filters={"city":"Ratingen","industry_code":"71.12.3","industry_scheme":"WZ2025"}'

{
    "results": [
        {
            "entity_id": "<32-char hex>",
            "name": "<string>",
            "registration": {
                "court": "<string>",
                "register_type": "<string>",
                "register_number": "<string>"
            },
            "address": {
                "house_number": "<string>",
                "street": "<string>",
                "postal_code": "<string>",
                "city": "<string>",
                "county": "<string>",
                "state": "<string>",
                "country": "<ISO country>",
                "coordinates": {
                    "latitude": "<float>",
                    "longitude": "<float>"
                }
            },
            "registration_date": "<ISO date>",
            "purpose": "<string>"
        }
    ],
    "total": "<int>",
    "meta": {
        "request_credit_cost": "<int>",
        "credits_remaining": "<int>"
    }
}

results[]

entity_id string

Stable 32-char hex identifier. Pass straight into /fetch-organization as `q`.

name string

Registered company name.

registration object

address object

Postal address with street, house_number, postal_code, city, county, state, country and coordinates (latitude/longitude).

registration_date date

Initial entry into the commercial register (ISO date).

purpose string

Stated business purpose (Unternehmensgegenstand).

top-level

total integer

Total result count for pagination.

meta.request_credit_cost integer

Credits actually charged for this call.

meta.credits_remaining integer

Account credit balance remaining after this call.

Location · Industry · Legal form · Full-text

Filters & master data — via search-organizations

City, industry, legal form, registration date: every argument combinable through the filters parameter. One REST endpoint, every German company.

Location & geo Filter by city, postal code, state and county through city, postal_code, state and county.
Industry (WZ2025) Industry segmentation via the official WZ2025 codes — industry_code combined with industry_scheme.
Legal form GmbH, AG, KG, OHG and more via legal_form_code.
Company size bs_company_size_category – small, medium, large based on balance-sheet totals.
Active status Restrict to active entries or include deleted companies via active.
Registration date Date ranges via registration_date_from and registration_date_to.
Full-text search Free-text query via the q parameter (min. 2 characters).
Pagination skip and limit (up to 30 results per call) for deep lists.
Master data per result entity_id, name, address, registration and registration_date – pass entity_id straight to /fetch-organization.

Run every filter live with an API key. Get an API key →

Code · AI-Agents · No-Code · Workflows

Drops into any stack

The search-organizations API speaks every mainstream client: REST, Python, Node, MCP for AI agents, n8n and webhook platforms.

REST API Simple GET request with the X-API-KEY header and JSON-encoded filters. Python requests, httpx or your favourite library — pass filters via json.dumps. Node.js fetch or axios with URLSearchParams. Works in edge, worker and browser runtimes. MCP Server Directly in Claude, Cursor or any MCP-aware AI client as the search_organizations tool. n8n Pre-built custom node for workflow automation — city, industry and size as filter inputs. Webhook Callable from Zapier, Make or any other webhook platform.

This list in your app

Grab an API key and filter every German company by city, industry, size and more — straight from your application. One REST endpoint, every result.

Get an API key

Filters & master data — via search-organizations

Drops into any stack

This list in your app

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