SIG Holstein

What SIG Holstein does

SIG Holstein (legal name: S-Immobiliengesellschaft Holstein mbH & Co. KG) is a German real estate brokerage and property development company headquartered in Bad Oldesloe, Schleswig-Holstein. It is a 100% subsidiary of Sparkasse Holstein, the regional savings bank, and operates 12-13 physical real estate offices (Immobilienbüros) spanning from Fehmarn to Hamburg, including locations in Ahrensburg, Lübeck/Bad Schwartau, and the Hamburg metropolitan area. The company claims to be Germany's largest real estate broker network (Deutschlands größter Maklerverbund) and serves individual buyers, sellers, capital investors, and project developers across Schleswig-Holstein and Hamburg.

Its core offering combines three lines: full-service residential and commercial brokerage (Immobilienvermittlung) at standard German commission rates of 6-7% of purchase price; a property listing portal for buying and renting; and in-house project development (Projektentwicklung/Hochbauprojekte) covering land acquisition, planning, construction, and sales. Active developments include the Blumenkoppel project in Timmendorfer Strand (58 rental apartments, ~20M EUR investment, KfW 55 EE standard, completing summer 2026), the Witt Huus in Heiligenhafen (sales launched May 2025, occupancy summer 2026), and the Schlie Leven waterfront project in Schleswig (multi-phase, active from 2022). Supporting products include the SIG-Premiumkunde tiered-customer program (offering earlier property access and bundled Sparkasse financing), the S-ImmoPreisfinder self-service valuation tool, and Erschließung & Bauen (land development and construction services).

The revenue model is predominantly transaction-fee based, supplemented by developer margin on in-house projects. The go-to-market relies on direct, in-person consultation through the branch network, a regional content-marketing website, and a referral channel fed by Sparkasse Holstein's banking customers. The company holds a §34c GewO trade license issued by IHK Lübeck and is led by Managing Director Markus Habermann; it is privately held inside the Sparkasse Holstein group with no external funding rounds or third-party investors.

Name

SIG Holstein

Legal name

S-Immobiliengesellschaft Holstein mbH & Co. KG

Website

https://sig-holstein.de

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

SIG Holstein (S-Immobiliengesellschaft Holstein mbH & Co. KG) is a 100% Sparkasse Holstein subsidiary operating 12-13 real estate offices across Schleswig-Holstein and Hamburg, offering residential and commercial brokerage, project development, and a premium-customer program to individual buyers, sellers, and investors in northern Germany.

Ownership category

akta.pro rank

Headquarters

HQ city

Bad Oldesloe

HQ country

Germany

HQ region

Europe

Offices4 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

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

Revenue model

1. Real Estate Brokerage Commission: Commission-based real estate brokerage services for buying, selling, and renting residential and commercial properties in Schleswig-Holstein and Hamburg regions.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

SIG Holstein is a real estate brokerage and property development company operating across Schleswig-Holstein and Hamburg in northern Germany. Through 12-13 physical real estate offices from Fehmarn to Hamburg, the company provides full-service real estate brokerage (buying, selling, renting), project development for new residential construction, and land development and building services.

Product overview

SIG Holstein (S-Immobiliengesellschaft Holstein mbH & Co. KG) operates as Germany's largest real estate broker network (Maklerverbund), offering comprehensive real estate services as a 100% subsidiary of Sparkasse Holstein. The company's product portfolio centers on full-service real estate brokerage (Immobilienvermittlung) through 12-13 offices spanning Fehmarn to Hamburg, complemented by a property listing portal (Immobilien-Angebote) for buying and renting, project development services (Projektentwicklung/Hochbauprojekte) for new construction, and development/construction services (Erschließung & Bauen). The SIG-Premiumkunde program provides premium customers with exclusive advantages including early access to property listings. Key development projects include the Witt Huus in Heiligenhafen and the Blumenkoppel project in Timmendorfer Strand (58 apartments, ~20 million euros investment). The company also offers property valuation tools (S-ImmoPreisfinder) and professional real estate consulting.

Differentiator

Problem solved

Functional benefit

Products and services

• Immobilienvermittlung (Real Estate Brokerage) Full-service real estate brokerage for residential and commercial properties in Schleswig-Holstein and Hamburg, operating through 12-13 real estate offices from Fehmarn to Hamburg, covering buying, selling, and renting transactions.
• Immobilien-Angebote (Property Listings) Property listing portal offering residential and commercial properties for purchase and rental across Schleswig-Holstein and Hamburg, accessible via the company's website.
• Projektentwicklung (Project Development) Real estate project development including planning, construction, object management, and financing from a single source, covering residential buildings, multi-family houses, and apartment complexes.
• Erschließung & Bauen (Development & Construction Services) Land development and building services for residential properties, delivered with regional specialists across northern Germany.
• Immobilienberatung (Real Estate Consulting) Professional real estate consulting for homeowners, buyers, and investors, including property valuation, marketing strategy, and financing guidance.
• SIG-Premiumkunde (Premium Customer Program) Premium customer program offering exclusive service advantages in property search, including early access to property listings (3 days earlier for standard listings) and a financing commitment via Sparkasse Holstein's Moin Eigenheim product.
• Witt Huus Heiligenhafen Residential development project in Heiligenhafen featuring apartments with planned summer 2026 occupancy, located near the Baltic Sea waterfront.
• Blumenkoppel Timmendorfer Strand New construction project featuring 58 rental apartments in four multi-family buildings near Timmendorfer Strand on the Baltic Sea coast, built to KfW 55 EE standard with air-source heat pumps, completion expected summer 2026, with an investment volume of approximately 20 million euros.

Quantifiable outcome

• SIG Premiumkunden receive property listings 3 days earlier for standard listings and 2 weeks earlier for project developments

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators2 records

Recent moves5 records

Expansion highlights5 records

Emerging players

• Homeday: German online real estate brokerage offering flat-fee sales services in major German metropolitan areas. Comparable to SIG Holstein as a competing residential brokerage using a digitally-enabled lower-fee model targeting sellers in regional German markets.
• McMakler: Berlin-based digital-first real estate brokerage offering flat-fee services across major German cities. Comparable to SIG Holstein as a German residential brokerage competitor pursuing an alternative, lower-cost model that pressures traditional full-service commission structures.

Direct peers

• Aigner Immobilien: Munich-based residential real estate brokerage with offices across Bavaria and major German cities. Comparable to SIG Holstein as a German regional full-service brokerage focused on residential sales, rentals, and project marketing.
• von Poll Immobilien: Frankfurt-based premium real estate brokerage with a nationwide franchise network across Germany and Europe. Comparable to SIG Holstein as a German full-service residential/commercial brokerage operating through a multi-office network and serving high-end and mid-market property segments.
• Postbank Immobilien: Real estate brokerage arm of Postbank (Deutsche Bank group) operating across Germany with bank-referral distribution. Comparable to SIG Holstein as a bank-affiliated full-service residential brokerage leveraging parent-customer referrals and combined financing services.
• Engel & Völkers: Hamburg-headquartered premium residential and commercial real estate brokerage with a franchise model operating across Germany and internationally. Directly comparable to SIG Holstein as a German bank-adjacent (historically) full-service residential brokerage with regional offices and development exposure.
• Sparkassen-Immobilien (S-Immobilien Verbund): The nationwide network of real estate subsidiaries operated by regional Sparkassen savings banks across Germany. Directly comparable to SIG Holstein as fellow Sparkasse-owned real estate brokerage subsidiaries offering integrated brokerage, project development, and financing services through local branch networks.

Broad incumbents

• ImmoScout24: Germany's largest online real estate marketplace, connecting buyers, sellers, and agents. Comparable to SIG Holstein as the dominant listing portal whose commission and traffic economics shape the entire German residential brokerage industry that SIG operates in.
• LBS Immobilien: Real estate brokerage subsidiary of Landesbausparkassen, serving German LBS savings bank customers nationwide. Comparable to SIG Holstein as another savings-group-affiliated real estate broker, though operating at significantly larger national scale.

Regional players

• DKB Immobilien: Real estate brokerage arm of DKB (Deutsche Kreditbank), serving customers primarily in eastern and northern German markets with bank-referral distribution. Comparable to SIG Holstein as another bank-affiliated brokerage leveraging a regional retail banking customer base for property transactions.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/sig-holstein

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

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 SIG Holstein