Core House

What Core House does

Kern-Haus AG (doing business as Kern-Haus) is a German massivhaus (solid construction) home builder founded in 1980 and headquartered in Ransbach-Baumbach, Germany. The company designs and constructs individually planned, architect-designed single-family homes for families, couples, and individuals across Germany, and has built over 15,000 homes since inception, with a current production capacity of approximately 450 houses per year. Its core technical offering is the DuoTherm massivbau construction system, a solid wall method combining internal and external insulation with steel-reinforced concrete, supplemented by traditional brick construction. Every home is built to Energy Efficiency Class A+ as standard, with optional Viessmann or Stiebel Eltron heat pumps and HomePlus photovoltaic systems, and is independently audited through a 5-phase TÜV Rheinland inspection.

The company operates a direct-to-consumer go-to-market model via 15 regional offices across Germany, supported by Musterhäuser (model homes) and exhibition centers where customers can experience homes firsthand. Named product lines include Familienhäuser, Stadtvillen, Bungalows, Bauhäuser, Doppelhäuser, Mehrfamilienhäuser, Tiny Houses, and the Nestbauhäuser entry-level series, with specific models such as Vision Plus, Signum, Linea, Karat, Vero, Allea, and Lucio. Pricing is turnkey and fixed for 24 months, backed by a 10-year warranty, with financing facilitated through approximately 300 partner banks and a plot search service leveraging a building plot database. The company is privately held, holds QNG sustainable building certification via DGNB membership, and serves exclusively German residential customers with no international footprint.

Name

Core House

Legal name

Kern-Haus AG

Website

https://kern-haus.de

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

251–500 employees

Short description

Kern-Haus AG is a German privately-held massivhaus home builder founded in 1980, designing and constructing individually planned architect-designed single-family homes for families and individuals across 15 regional offices in Germany, using proprietary DuoTherm solid construction with Energy Efficiency Class A+ as standard.

Ownership category

akta.pro rank

Product category

Residential Construction

NAICS

New Housing For-Sale Builders (236117)

SIC

General Bldg Contractors - Residential Bldgs (1520)

akta.pro primary industry

Single-Family Home Construction (Detached Homes) (IMAFABAA)

akta.pro secondary industries

Multi-Family Residential Construction (Apartments, Condos, Townhomes) (IMAFABAB), Residential Land Development & Subdivision Homebuilding (Build-to-Sell Communities) (IMAFABAL)

Keywords

• Solid construction homes
• Custom architect houses
• Turnkey home construction
• Energy efficient homes
• Residential home building

Headquarters

HQ city

Ransbach-baumbach

HQ country

Germany

HQ region

Europe

Offices4 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Marketing or Sales, Infrastructure

Revenue model

1. House Sales: One-time sales of custom-built massivhaus (solid construction) houses. Each house is individually planned by architects and built according to customer specifications. Revenue is generated per project with prices based on house model, customization, and location.
2. Financing Services: Kern-Haus offers financing consultation services through approximately 300 banks, providing customers with mortgage and loan options for their house purchase.
3. Land/Plot Services: Ground plot finding and acquisition support through the Kern-Haus property database containing thousands of building plots across Germany.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

Kern-Haus AG (trading as Core House) plans and builds individually designed, solid-construction (Massivhaus) single-family homes for private buyers across Germany, delivered as turnkey projects with fixed-price guarantees. The company operates 15 sales and construction locations nationwide and has delivered over 15,000 homes since 1980, using in-house civil-engineering and carpentry crews and a 5-phase TÜV/DEKRA inspection process.

Product overview

Kern-Haus is a German massivhaus (solid construction) home builder offering individually planned architect houses with over 45 years of experience and 15,000+ built homes across 15 locations in Germany. The company provides a comprehensive portfolio of house types including family houses, city villas, bungalows, semi-detached houses, Bauhaus style homes, multi-family houses, and tiny houses. All houses are customizable and built using solid construction methods (traditional brick or modern DuoTherm steel concrete). The company offers integrated services including turnkey construction, smart home systems, heat pumps (air-water and ground-source), photovoltaic installations, TÜV quality inspections, plot search services, and financing support. Specific named house models include Vision Plus, Signum, Linea, Karat, Vero, Allea, Easy, Lucio, Anteo, Lumina, and the Nestbauhäuser series. Equipment packages like Edition 26 provide premium fittings including electric shutters and branded bathroom fixtures.

Differentiator

Problem solved

Functional benefit

Products and services

• Individually planned architect houses (Architektenhäuser) Custom-designed single-family homes planned individually for each private buyer and built in solid construction (Massivhaus), offered for owner-occupier families across Germany.
• Turnkey solid-construction home construction End-to-end turnkey home building service covering planning, civil engineering, carpentry and handover, delivered with a fixed-price guarantee for private homeowners.
• Energy-efficient home packages (DuoTherm / heat pump / PV) Energy-efficiency features integrated into Core House homes as standard, including DuoTherm insulation, heat pumps, photovoltaic systems and controlled residential ventilation for sustainable owner-occupied homes.

Quantifiable outcome

• All houses built to Energy Efficiency Class A+ as standard
• +2 more outcomes

Named customers13 records

Segments3 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Five partnerships are on record, tiered core.

• Rheinquartier GmbH & Co. KGcoreStrategic or Co-development Partner · 1 January 2015Kern-Haus served as development partner in the Rheinquartier residential project in Oberlahnstein near Koblenz, creating 13 custom architect houses (Rheinbogenhäuser) in the Victoriaviertel quarter, developed since 2015 in coordination with the city of Lahnstein.
• Deutsche Gesellschaft für Nachhaltiges Bauen (DGNB)coreStrategic or Co-development PartnerKern-Haus is a member of DGNB and offers QNG-certified (Qualitätssiegel Nachhaltiges Gebäude) massivhaus constructions. DGNB experts support customers through the certification process for KfW 'Klimafreundlicher Neubau' funding eligibility.
• ViessmanncoreTechnology or IntegrationKern-Haus installs Viessmann heat pumps (air-water and ground-source) and ventilation systems with heat recovery for energy-efficient heating and hot water in their houses.
• Stiebel EltroncoreTechnology or IntegrationKern-Haus installs Stiebel Eltron air-water heat pumps for heating and hot water supply in their massivhaus constructions.
• TÜV RheinlandcoreTechnology or IntegrationKern-Haus has implemented a 5-phase TÜV quality inspection process where independent TÜV appraisers check all relevant construction phases for quality assurance.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• WeberHaus: One of Germany's largest prefabricated and solid construction home builders, headquartered in Rheinau. Directly competes with Kern-Haus in the individually planned family home segment with comparable energy efficiency positioning and nationwide distribution.
• Town & Country Haus: Mass-market German home builder with a franchise network of regional partners. Competes directly with Kern-Haus in entry-level family homes but with a more standardized product line and volume positioning.
• FingerHaus: German family-owned home builder based in Frankenberg offering individually planned Massivhaus and prefabricated homes. Direct competitor in the custom architect house category with similar energy efficiency and full-service offering.
• Allkauf Haus: German home builder (part of DFH Group) offering massivhaus and prefabricated homes. Comparable in customer base, product range, and direct-to-consumer sales model across Germany.
• Bien-Zenker: German home builder (part of DFH Group) offering individually planned family homes in solid and prefabricated construction. Direct competitor with overlapping product portfolio and national distribution.
• Roth-Massivhaus: German solid construction home builder based in Hainichen, Saxony. Overlaps with Kern-Haus in Massivhaus construction, energy efficiency positioning, and direct sales to families in Eastern and Central Germany.
• HELMA Eigenheimbau AG: Publicly-listed German home builder specializing in solid construction (Massivhaus) single-family homes and multi-family projects. Comparable in customer base, energy efficiency positioning, and direct sales model.
• SchwörerHaus: German family-owned home builder offering solid construction and prefabricated houses with strong energy efficiency credentials. Comparable in product range, energy positioning, and direct-to-consumer sales model.
• Viebrockhaus: German Massivhaus specialist focused on energy-efficient family homes in Northern Germany. Direct competitor in the solid construction segment with similar energy efficiency class positioning.
• Heinz von Heiden Massivhäuser: One of Germany's largest Massivhaus builders, part of the Mensching Group. Direct competitor in the solid construction family home segment with comparable nationwide presence and full-service approach.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/kernhaus
• Facebookfacebook.com/kernhaus

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Core House