Engineering activities for technical building equipment companies in Hannover

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

113 companies · 21–40 of 113

EnerSim GmbH GmbH · HRB 224816 Hannover (Hanover) · 2013
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ENTROSAN GmbH GmbH · HRB 228818 Hannover (Hanover) · 2025
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envibe GmbH GmbH · HRB 223066 Hannover (Hanover) · 2022
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ESP Digital Services GmbH GmbH · HRB 58335 Hannover (Hanover) · 2000
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ESP-Projects GmbH GmbH · HRB 212582 Hannover (Hanover) · 2015
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Event Werk GmbH GmbH · HRB 206582 Hannover (Hanover) · 2011
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ezs Planungsgesellschaft mbH GmbH · HRB 56214 Hannover (Hanover) · 1997
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f/eins:projekte GmbH & Co. KG GmbH & Co. KG · HRA 203983 Hannover (Hanover) · 2016
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Fabrikunion GmbH GmbH · HRB 225338 Hannover (Hanover) · 2023
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Ferdinand Bock & Partner eGbR eGbR · GsR 358 Hannover (Hanover) · 2024
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Gebku GmbH Gebäudeinstandsetzungs- und Bauunterhaltungsgesellschaft Kuhnert GmbH · HRB 201382 Hannover (Hanover) · 2007
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GERMAN ENGINEERING and TRADE SERVICES GmbH GmbH · HRB 62476 Hannover (Hanover) · 2005
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GHS-Technet GmbH GmbH · HRB 221762 Hannover (Hanover) · 2021
e725718655…
GRA Gesellschaft für Regel- und Anlagentechnik mbH GmbH · HRB 61393 Hannover (Hanover) · 2006
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grbv wind GmbH GmbH · HRB 207211 Hannover (Hanover) · 2011
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GTA Gesellschaft für Technische Akustik mbH GmbH · HRB 56030 Hannover (Hanover) · 1997
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H2 Performance GmbH GmbH · HRB 224587 Hannover (Hanover) · 2022
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h4plan GmbH GmbH · HRB 210903 Hannover (Hanover) · 2006
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HaGro Projekt-Team GmbH GmbH · HRB 57800 Hannover (Hanover) · 2006
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haustechnik nord GmbH GmbH · HRB 56341 Hannover (Hanover) · 1997
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All industries in Hannover

Live API

GEThandelsregister.ai/api/v1/search-organizations

?limit=20

&skip=20

&filters={"city":"Hannover","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": "Hannover",
        "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": "Hannover",
      "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": "Hannover",
        "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":"Hannover","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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