Engineering activities for technical building equipment companies in Köln

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

246 companies · 41–60 of 246

CUBIST GmbH GmbH · HRB 90685 Köln (Cologne) · 2017
b7dabdf847…
Das E-Bureau GmbH GmbH · HRB 104824 Köln (Cologne) · 2021
303e08d5d2…
Das Ingenieurbüro Okka GmbH GmbH · HRB 113850 Köln (Cologne) · 2023
30d5dd9bc5…
di-cc Umwelt-Energie GmbH GmbH · HRB 28584 Köln (Cologne) · 2001
e2432a9b75…
di-pa Technische Gebäudeservice GmbH GmbH · HRB 12461 Köln (Cologne) · 1981
7a75f53d59…
DIGA - Ingenieur GmbH & Co. KG GmbH & Co. KG · HRA 15677 Köln (Cologne) · 2001
c0451c9829…
DIGA Engineering & Consulting GmbH GmbH · HRB 124673 Köln (Cologne) · 2025
e32c15717f…
DOELLE Ingenieurbüro für Gebäudetechnik GmbH GmbH · HRB 87853 Köln (Cologne) · 2016
99662f3c4a…
Dr. Schönheit + P. Consulting GmbH GmbH · HRB 28794 Köln (Cologne) · 1997
36382f72ab…
Dr. Schönheit + P. Engineering GmbH GmbH · HRB 37116 Köln (Cologne) · 2002
72cdaf8cdc…
E-WERKPLAN GmbH & Co. KG GmbH & Co. KG · HRA 31781 Köln (Cologne) · 2016
a7b3672fae…
Ebade & Scholz Energieberatung UG (haftungsbeschränkt) UG (haftungsbeschränkt) · HRB 118585 Köln (Cologne) · 2024
b0dcef0a71…
EC-Gebäudetechnik GmbH GmbH · HRB 124199 Köln (Cologne) · 2025
06e7370628…
EEM Gebäudetechnik GmbH GmbH · HRB 97334 Köln (Cologne) · 2019
7d5e8f8377…
EfoS Experts for occupational Safety GmbH GmbH · HRB 113136 Köln (Cologne) · 2021
a94b2bf6bc…
EGA Service GmbH GmbH · HRB 52971 Köln (Cologne) · 2004
116a1c3137…
Elektec GmbH GmbH · HRB 78145 Köln (Cologne) · 2007
91e42b7a7c…
ELEKTROSOL GmbH GmbH · HRB 92034 Köln (Cologne) · 2017
9bf391d594…
Elektrotechnik Kalkuhl GmbH GmbH · HRB 86643 Köln (Cologne) · 2016
a884a795df…
Elektrotechnik Kaltwasser GmbH GmbH · HRB 122530 Köln (Cologne) · 2025
308183c958…

All industries in Köln

Live API

GEThandelsregister.ai/api/v1/search-organizations

?limit=20

&skip=40

&filters={"city":"Köln","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": "Köln",
        "industry_code": "71.12.3",
        "industry_scheme": "WZ2025"
    },
    limit=20,
    skip=40,
)
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": "Köln",
      "industry_code": "71.12.3",
      "industry_scheme": "WZ2025"
  },
  limit: 20,
  skip: 40,
});
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": "Köln",
        "industry_code": "71.12.3",
        "industry_scheme": "WZ2025"
    },
    limit: 20,
    skip: 40,
  });
  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&skip=40' \
  -H 'x-api-key: YOUR_API_KEY' \
  -G --data-urlencode 'filters={"city":"Köln","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

Cookie Settings

Customize Cookie Settings