Kozijn Service Nederland

What Kozijn Service Nederland does

Kozijn Service Nederland (KSN) is a privately held Dutch field service company, founded in 2009 and headquartered in Wassenaar, that specializes exclusively in the repair, maintenance, and restoration of existing window frames (kozijnen) made of wood, aluminium, and kunststof. The company operates a nationwide network of at least eight regional service offices (including Wassenaar, Oude Meer, Ridderkerk, Groningen, Leeuwarden, Zwolle, Terborg, Gemert, and Hoensbroek), backed by fully equipped service vans, a dedicated glass replacement vehicle (glasbus), and the KSN Academy training facility in Ridderkerk. KSN is an operating subsidiary of VHZ Groep, a leading Dutch window frame industry group, and leverages shared infrastructure with sister company Kumij.

KSN's service portfolio is organized into service & repair, schadeherstel (damage repair) including spray painting (spuitwerk) and foil wrapping (folie), glass replacement (glasvervanging), parts supply (kozijnonderdelen, including seals and SKG-certified hardware), and a structured maintenance line subdivided into preventive, periodic, and project-based contracts. Customers include both residential consumers (particulieren) and a broad B2B base of housing corporations (woningcorporaties), VvEs (owners associations), property managers, healthcare institutions, (semi-)government bodies, student housing operators, schools, and office owners. The company does not manufacture or install new window frames; its explicit value proposition is that repair is cheaper than replacement ('Hersten is voordeliger dan vernieuwen').

KSN generates revenue primarily through one-off field service visits (with a publicly disclosed starttarief of €183 excl. VAT covering the first visit assessment plus labor), supplemented by recurring maintenance contracts, parts supply, and project-based multi-property engagements. Marketing and lead generation run through ksn.nl, phone (088 02 02 500), email, and customer reviews on Trustpilot and Google, where KSN holds a 4.4/5 rating. No public revenue, funding, or investor disclosures are available, and the company has ~30 employees. No AI/ML capabilities, APIs, or software products are evident; the offering is fundamentally a physical, labor-intensive field service business.

Name

Kozijn Service Nederland

Legal name

Kozijn Service Nederland

Website

https://ksn.nl

Company type

Private

Founded year

2009

Operating status

Operating

Headcount range

11–50 employees

Short description

Privately held Dutch field service company founded in 2009, specializing in the repair, maintenance, and parts supply for existing wood, aluminium, and kunststof window frames across the Netherlands, serving both residential customers and B2B portfolio owners such as housing corporations, VvEs, property managers, and public-sector clients.

Ownership category

akta.pro rank

Headquarters

HQ city

Wassenaar

HQ country

Netherlands

HQ region

Europe

Offices9 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Marketing or Sales, Technology or R&D

Revenue model

1. Service & Reparatie: On-site service visits where technicians repair and restore existing window frames, doors, and sliding doors. Includes a first visit starting rate. Revenue is generated per service event with a known pricing structure (starting rate + hourly labor).
2. Onderhoud (Maintenance): Preventive maintenance and periodic maintenance contracts for housing corporations, VvEs, property managers, and other organizations managing multiple properties. Services include scheduled inspections, maintenance visits, and repair work.
3. Kozijnonderdelen (Window Parts): Supply and delivery of replacement parts for window frames, including window rubbers, hinges, locks, and other hardware. Many parts are kept in stock for immediate delivery.
4. Schadeherstel (Damage Repair): Repair of damage to window frames caused by burglary, impact, wear, or weathering. Includes spray painting and foil application services to restore surface finish without full replacement.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels5 records

Core offering

Kozijn Service Nederland (KSN) is a specialized service and maintenance company for existing window frames (kozijnen) made of wood, aluminum, and plastic. The company provides on-site repair, restoration, glass replacement, spray painting, foil application, replacement parts, and preventive maintenance services across the Netherlands. KSN does not manufacture or install new window frames — it exclusively services, repairs, and maintains existing ones through field-based technicians.

Product overview

Kozijn Service Nederland (KSN) is a specialized service and maintenance company for existing window frames (kozijnen), operating across the Netherlands since 2009. The company offers a comprehensive portfolio of physical service offerings organized into two segments: B2C (residential) and B2B (business clients including housing corporations, VvEs, property managers, healthcare institutions, schools, government, and commercial real estate). The core product line includes: (1) Service & Reparatie — general repair and troubleshooting for windows, doors, and sliding doors; (2) Herstel Werkzaamheden — professional restoration and repair of damaged or worn window frames; (3) Schadeherstel — damage repair including two sub-services, Spuitwerk (spray painting/refinishing) and Folie (foil wrapping) for surface restoration; (4) Glasvervanging — glass replacement in existing frames; (5) Kozijnonderdelen — supply of replacement parts including Kozijnrubber (seals) and Hang- en Sluitwerk (hinges and hardware); and (6) Onderhoud — maintenance services subdivided into Preventief Onderhoud (preventive maintenance), Periodiek Onderhoud (periodic/scheduled maintenance), and Projectmatig Onderhoud (project-based maintenance for multi-property portfolios). KSN operates nationwide through multiple regional locations and does not replace window frames — only services, repairs, maintains, and restores existing ones. The company is part of the VHZ Groep, a leading Dutch window frame industry group.

Differentiator

Problem solved

Functional benefit

Products and services

• Service & Reparatie (Service & Repair)

Quantifiable outcome

• Repair is often significantly cheaper than full replacement
• +3 more outcomes

Named customers2 records

Segments9 records

Ideal customer profiles9 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Four partnerships are on record, tiered core and minor.

• VHZ GroepcoreStrategic or Co-development PartnerKSN is a subsidiary of VHZ Groep, a leading organization within the Dutch window frame industry. Within the group, various specialized companies cooperate in the areas of window frames, insulating glass, production, installation, and service. This gives KSN access to extensive knowledge, technical expertise, and a strong network within the industry.
• KumijcoreStrategic or Co-development PartnerKumij shares a location with KSN in Oude Meer (Breguetlaan 1, adjacent to Schiphol runway) and in Groningen. The partnership enables joint operations and shared infrastructure.
• Nijhuis BouwminorStrategic or Co-development PartnerCollaboration on the SWZ Zwolle maintenance project, where Nijhuis Bouw checks the front doors while KSN handles window frame maintenance, ensuring a smooth and careful maintenance process.
• Immerzeel KraanverhuurminorOthersImmerzeel Kraanverhuur provided a crane (hijskraan) for a glass replacement project at the Ruychrocklaan in The Hague, where a sunken window on the top floor of an apartment complex required glass to be safely lifted to height.

Scale indicators3 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Unica: Dutch technical installation and maintenance services company serving commercial, industrial, and residential customers with multi-disciplinary building services. Comparable to KSN in its nationwide field-service coverage and recurring B2B maintenance contract model, though broader in technical scope.
• Mourik: Dutch industrial and building services contractor offering maintenance, repair, and renovation services across multiple sites in the Netherlands. Comparable to KSN in providing recurring, multi-site maintenance services to B2B clients with a field-technician-driven operating model.
• Van Wijk Groep: Dutch facility and technical services group providing maintenance, building services, and installation across commercial and residential portfolios. Comparable to KSN in serving property managers and corporate clients with multi-site maintenance contracts and recurring service revenue.
• Glasmeester: Dutch glass and window repair service chain operating across the Netherlands, providing on-site glass replacement, window repair, and 24/7 emergency service. Most directly comparable peer to KSN in terms of service category (glass/window repair), customer base (residential and small business), and field-service delivery model.

Broad incumbents

• Hörmann: European market leader in doors, frames, and related building components. Comparable as a broad incumbent with a large Dutch installed base that creates ongoing service, parts, and repair demand adjacent to KSN's window frame offering.
• Schüco International: Large German manufacturer of aluminum, steel, and PVC-U window, door, and façade systems. Comparable to KSN as a major incumbent in the Dutch window frame ecosystem whose installed base generates the demand for KSN's maintenance and repair services.
• Kawneer: Aluminum architectural systems manufacturer with operations in the Netherlands (Harderwijk) and a KSN technology partner. Comparable as a major incumbent whose products generate maintenance demand and whose technical knowledge supports KSN's service operations.
• Reynaers Aluminium: Belgian manufacturer of aluminum window, door, and façade systems with significant presence in the Netherlands. Comparable as a broad incumbent whose installed aluminum systems represent part of the addressable maintenance and repair opportunity for KSN.
• Kumij: Sister company within VHZ Groep focused on window frame production and installation. Shares office locations with KSN (Oude Meer, Groningen) and operates in the same Dutch window frame value chain, providing a useful comparison of the production vs. service operating model inside the same group.
• BAM Bouw en Vastgoed: Largest Dutch construction and property services group with significant maintenance, renovation, and facility management operations. Comparable as a broad incumbent that competes for large multi-site maintenance and renovation contracts, including window and façade work, alongside KSN's niche repair positioning.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/kozijn-service-nederland

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 Kozijn Service Nederland