KLOK

What KLOK does

KLOK Onderhoud- en Afbouwgroep BV is a third-generation, family-owned Dutch specialty construction and maintenance company headquartered in Assen, operating across Noord-Nederland (Drenthe, Groningen, Friesland, and Kop van Overijssel). The company is organized into four operating divisions: Klok Schilderwerken (painting and decoration, 80+ years), Klok Glascentrale (insulating glazing, glass walls/doors, 24-hour emergency service, 25 years), Klok Project Totaal (project stoffering, partition walls, system ceilings, carpentry, specialist cleaning, ~35 years), and Klimadak (a proprietary white sun-reflective roof membrane combined with high-efficiency solar panels carrying a 20-year warranty). Services are delivered by approximately 70 in-house specialist tradespeople working in cross-trained integrated teams, with no subcontractor dependency.

KLOK serves two customer segments through a hybrid go-to-market: a business market (zakelijke markt) comprising housing corporations, healthcare institutions, schools, government/semi-government bodies, insurance companies, and VvE associations, and a consumer market of private homeowners. Engagement is direct (no resellers or intermediaries), with a dedicated project manager assigned per engagement. Revenue is generated across four streams: (1) recurring subscription maintenance via the Huisabonnement (consumer, month-to-month) and Vastgoedabonnement (commercial property, multi-year fixed), (2) turn-key renovation and fit-out projects, (3) 24/7 emergency and calamity services on contract or pay-as-you-go basis, and (4) Klimadak energy-roof installations. Subscriptions shift maintenance risk from the owner to KLOK and include an indefinite/unlimited guarantee on exterior painting.

The business is supported by a set of quality, safety, and sustainability credentials (ISO 9001:2015, VCA**, CO2-Prestatieladder Level 3, MVO, ORCiv 2020-2025, Koploper Project) that are used to qualify for tender-driven B2B work. Two independent companies, Convair (project textile wholesaler) and 123gordijn (e-commerce for window decoration), have been spun out of the group and continue to operate alongside KLOK without disclosed ownership ties. Pricing is quote-based across all service lines; sustainability project quotes currently carry a minimum lead time of approximately two months, indicating capacity-constrained delivery.

Name

KLOK

Legal name

KLOK Onderhoud- en Afbouwgroep BV

Website

https://klok.nl

Company type

Private

Founded year

1930

Operating status

Operating

Headcount range

11–50 employees

Short description

KLOK Onderhoud- en Afbouwgroep is a third-generation Dutch family-owned specialty construction and maintenance firm in Assen serving private homeowners, housing corporations, healthcare, government, and insurance clients in Northern Netherlands via painting, glazing, renovation, and subscription-based property maintenance.

Ownership category

akta.pro rank

Product category

Property Maintenance and Renovation Services

NAICS

Glass and Glazing Contractors (23815)

SIC

General Bldg Contractors - Residential Bldgs (1520), General Bldg Contractors - Nonresidential Bldgs (1540)

akta.pro primary industry

Small Exterior Repairs (Trim, Fascia, Soffit, Siding Patches) (HSAGAAAJ)

akta.pro secondary industry

Minor Tile/Grout Recaulking & Bathroom/Kitchen Touch-Ups (HSAGAAAH)

Keywords

• Property maintenance services
• Renovation and fit-out
• Preventive maintenance subscriptions
• Glazing and facade services
• Solar roofing systems

Headquarters

HQ city

Groningen

HQ country

Netherlands

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Maintenance Subscriptions (Huisabonnement & Vastgoedabonnement): Recurring subscription revenue from home maintenance (Huisabonnement) and commercial property maintenance (Vastgoedabonnement) contracts. The Huisabonnement is month-to-month cancellable; the Vastgoedabonnement is billed as fixed monthly or annual amounts. Both models provide recurring, predictable revenue.
2. Project-Based Construction and Renovation: One-time project revenue from turn-key construction, renovation, and fit-out projects, covering residential, commercial, healthcare, and educational properties. Includes construction management from design through handover.
3. 24/7 Emergency and Calamity Services: Per-incident fees for emergency services including glass breakage, storm damage, burglary, vandalism, and lockouts. Also available on a contract basis with pre-agreed service levels and response times.
4. Klimadak Energy Roof Installation: Installation of proprietary energy-generating roofs (Klimadak) including reflective coating and solar panels, generating revenue as a one-time project with a 20-year warranty.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels4 records

Core offering

KLOK is a construction and maintenance company that delivers property maintenance, renovation, and sustainable building solutions for residential, commercial, healthcare, and government real estate in Northern Netherlands. Its offering spans turn-key renovation projects, painting, glazing, fit-out, 24/7 emergency services, and recurring preventive-maintenance subscriptions (Huisabonnement for homeowners and Vastgoedabonnement for commercial property owners). The company also sells and installs Klimadak, a proprietary energy-generating roof system combining sun-reflective coating with high-yield solar panels.

Product overview

KLOK Onderhoud- en Afbouwgroep is a construction and maintenance company offering a portfolio of services through multiple divisions and subscription products. The core offering spans property maintenance (vastgoedonderhoud), renovation (verbouwen/renovatie), painting (schilderwerk), sustainable insulation and solar solutions (verduurzaming), and 24-hour emergency services. Key branded products include: Klok Project Totaal (project finishing and stoffering), Klok Schilderwerken (painting and decoration), Klok Glascentrale (glass and glazing), Klimadak (energy-generating roofing with solar panels), the Vastgoedabonnement (commercial property maintenance subscription), and the Huisabonnement (residential maintenance subscription). These are delivered by approximately 70 in-house specialists organized in cross-functional teams, covering the full value chain from inspection and preventive maintenance through to complete turn-key renovations and energy-generating roof installations.

Differentiator

Problem solved

Functional benefit

Brands

• Klok Project Totaal: Active for about 35 years in project stoffering, scheidingswanden, systeemplafonds, timmerwerk and specialistische reiniging.
• Klok Schilderwerken
• Klok Glascentrale
• Klimadak

Products and services

• Huisabonnement (Home Maintenance Subscription) A month-to-month cancellable preventive maintenance subscription for private homeowners. Includes twice-yearly cleaning of frames, roof tiles, gutters, windows and solar panels, with continuously maintained exterior painting covered by an unlimited guarantee.
• Vastgoedabonnement (Property Subscription) A multi-year, fixed-price preventive maintenance subscription for commercial real estate owners. Annual inspections assess building condition and maintenance work is planned per building element, transferring maintenance risk from owner to KLOK.
• Klimadak Energy-Generating Roof A proprietary white, sun-reflective roof membrane applied over existing roofing, integrated with specially tuned high-efficiency solar panels. Generates more energy per panel than standard installations while keeping interiors cooler, with a guaranteed lifespan of at least 20 years.

Quantifiable outcome

• Unlimited guarantee on exterior painting for homes under the Huisabonnement, cancellable monthly
• +3 more outcomes

Named customers7 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Five partnerships are on record, tiered minor.

• InDerhoud.nlminorChannel Partner/ Reseller/ DistributorKLOK is affiliated with InDerhoud.nl, a Dutch industry association for property maintenance companies, providing visibility and credibility within the Dutch maintenance and renovation sector.
• VCCN (Vereniging van Curtain Wall en gevels Nederland)minorChannel Partner/ Reseller/ DistributorKLOK is affiliated with VCCN, the Dutch association for facade and curtain wall companies, which is relevant given KLOK's glazing, facade maintenance, and Klimadak services.
• Erkend LeerbedrijfminorOthersKLOK is an officially recognized training company (Erkend Leerbedrijf), enabling the company to take on apprentices and trainees in partnership with Dutch vocational education institutions.
• ConvairminorOthersWholesale company in (project) textile products, founded as a spin-off from KLOK's operations. Convair operates independently from KLOK.
• 123gordijnminorOthersE-commerce company for online ordering of window decoration, founded as a spin-off from KLOK's operations. 123gordijn operates independently from KLOK.

Scale indicators4 records

Recent moves9 records

Expansion highlights5 records

Broad incumbents

• TBI Holdings: Dutch holding group with subsidiaries in technical services, building construction, and facility maintenance (including Croonwolter&dros). Comparable to KLOK in offering integrated multi-trade building services and maintenance, but at significantly larger national scale.
• Koninklijke BAM Groep: Largest Dutch construction group, active in building construction, civil engineering, and property maintenance/renovation including energy upgrades. Overlaps with KLOK on multi-trade maintenance and renovation but at national/international scale with public tender capabilities.
• Van Wijnen: Dutch construction and development company with strong regional operations across multiple provinces including renovation, maintenance, and energy-transition services. Comparable to KLOK as a multi-trade construction/maintenance firm with a regional Dutch operating model.
• Ballast Nedam: Dutch construction company with divisions in construction, infrastructure, and property development/renovation including energy-neutral building solutions. Comparable to KLOK in providing renovation and sustainability-focused building services, though at much larger national scale.
• Heijmans: Dutch-listed construction and property development firm with substantial property maintenance, renovation, and energy-transition services. Comparable to KLOK in delivering integrated property services and energy/sustainability upgrades, but operates nationally and at much larger scale.
• Dura Vermeer: Large Dutch construction company operating across building, infrastructure, and property maintenance/renovation nationwide. Comparable to KLOK in providing multi-trade maintenance and renovation services, though at significantly larger scale and broader geography than KLOK's regional Northern Netherlands focus.
• VolkerWessels: Major Dutch construction and property services group with divisions covering building, infrastructure, and property maintenance/renovation across the Netherlands. Comparable to KLOK in providing integrated property services but operates nationally with significantly larger resource base.
• Facilicom Solutions Group: Dutch integrated facility services provider offering property maintenance, building services, and 24/7 support across commercial and public-sector clients. Comparable to KLOK's Vastgoedabonnement and 24/7 emergency service offerings for institutional clients.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xx.com/KLOK_ASSEN

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries4 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 KLOK