Engineering activities for technical building equipment companies in Düsseldorf

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

172 companies · 21–40 of 172

BBGT Wenzel & Wiegand GmbH GmbH · HRB 104769 Düsseldorf (Dusseldorf) · 2024
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BDK plan Ingenieurgesellschaft für Haustechnik mbH GmbH · HRB 95531 Düsseldorf (Dusseldorf) · 1998
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BETA ZAUN GmbH GmbH · HRB 104497 Düsseldorf (Dusseldorf) · 2024
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blauphysik GmbH GmbH · HRB 91245 Düsseldorf (Dusseldorf) · 2020
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Blue I GmbH GmbH · HRB 87075 Düsseldorf (Dusseldorf) · 2019
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BMA.EXPERT RBS GmbH GmbH · HRB 109880 Düsseldorf (Dusseldorf) · 2025
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BMT Engineering UG (haftungsbeschränkt) & Co. KG UG (haftungsbeschränkt) & Co. KG · HRA 24005 Düsseldorf (Dusseldorf) · 2016
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Bohne Ingenieure GmbH GmbH · HRB 33417 Düsseldorf (Dusseldorf) · 1996
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BPK Ingenieure und Sachverständige für Brandschutz GmbH & Co. KG GmbH & Co. KG · HRA 22216 Düsseldorf (Dusseldorf) · 2012
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BRANDONA UG (haftungsbeschränkt) UG (haftungsbeschränkt) · HRB 82564 Düsseldorf (Dusseldorf) · 2018
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Bremer Projektabwicklungsgesellschaft mbH GmbH · HRB 65510 Düsseldorf (Dusseldorf) · 2011
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Broos Project GmbH GmbH · HRB 104848 Düsseldorf (Dusseldorf) · 2024
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BUNMET ENGINEERING S.R.L., Zweigniederlassung Düsseldorf GmbH · HRB 96849 Düsseldorf (Dusseldorf) · 2022
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C & C International Holding GmbH GmbH · HRB 82583 Düsseldorf (Dusseldorf) · 2018
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Campus Planung GmbH GmbH · HRB 59306 Düsseldorf (Dusseldorf) · 2008
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COMSOLIS UG (haftungsbeschränkt) UG (haftungsbeschränkt) · HRB 98408 Düsseldorf (Dusseldorf) · 2022
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contecno gmbh GmbH · HRB 19634 Düsseldorf (Dusseldorf) · 1985
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Cooling Water Technologies GmbH GmbH · HRB 109100 Düsseldorf (Dusseldorf) · 2025
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cowinco buero & technics e.K. e.K. · HRA 27097 Düsseldorf (Dusseldorf) · 2022
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CP Fachplanungsbüro für Elektrotechnik UG (haftungsbeschränkt) UG (haftungsbeschränkt) · HRB 90158 Düsseldorf (Dusseldorf) · 2020
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All industries in Düsseldorf

Live API

GEThandelsregister.ai/api/v1/search-organizations

?limit=20

&skip=20

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