Hoklartherm GmbH

What Hoklartherm GmbH does

Hoklartherm GmbH is a privately held German specialty manufacturer of premium glass-and-metal garden structures, headquartered in Apen, Lower Saxony. Founded in 1982 by Dipl.-Ing. Werner Hollander, the company designs and produces its own aluminum profile systems — comprising approximately 450 proprietary cross-sections — and operates manufacturing, sales, and a 20,000 sqm exhibition garden with over 60 display models from a single location. Its product range spans five main categories: greenhouses (including the Bio-Top series, Arcus, Livingten, Terra balcony greenhouse, and the Judith Rakers Collection), rotatable and fixed pavilions (Rondo VK, Rondo-Solar, Classico), wind protection systems (mobile Flower-Line and fixed glass elements), terrace and pool canopies (Berlinada, Pagodendach, carports, Schwimmbadüberdachung), and conservatories/summer gardens (Solarveranda Berlin with patented KST power-assisted sliding technology).

The business model is direct-to-consumer manufacturing: products are sold one-time as kits for self-assembly or with the company's own installation services, priced from approximately €1,940 for a covered bench up to over €23,700 for a large rotating glass pavilion, with custom constructions quoted individually. An accessories e-commerce shop (shop.hoklartherm.de) generates supplementary recurring revenue from shading systems, replacement parts, and complementary products. The primary customer segment is individual private garden owners seeking weather-protected growing spaces and outdoor living rooms; secondary segments include hospitality, educational institutions, and non-profits, but no enterprise anchor accounts are disclosed. Distribution is exclusively direct via the Apen exhibition garden, the company website, phone/email consultation, and trade fairs (Tarmstedter Ausstellung, Landtage Nord), with international deliveries available to Europe, UAE, USA, Israel, and Russia.

The company currently employs over 100 people, has no external funding or parent company, and pursues innovation through in-house architects and draftspersons. Notable intellectual property includes the KST sliding patent, and the firm has received the Bavarian State Prize (2001, 2004) and the Innovation Prize Lower Saxony (2000). Recent strategic activity (2017-2023) includes new product launches in compact urban and lounge formats, a 2019 contract-manufacturing capacity expansion, and the 2023 Judith Rakers celebrity collaboration, indicating ongoing category and channel extension within a fundamentally niche, premium, family-controlled manufacturing business.

Name

Hoklartherm GmbH

Legal name

HOKLARTHERM GmbH

Website

https://hoklartherm.de

Company type

Private

Founded year

1982

Operating status

Operating

Headcount range

1–10 employees

Short description

Hoklartherm GmbH is a German specialty manufacturer, founded 1982 and based in Apen, that designs, produces, and directly sells premium aluminum-and-glass greenhouses, pavilions, wind protection, and terrace canopies to private garden owners across Germany and select international markets.

Ownership category

akta.pro rank

Product category

Garden Structures & Outdoor Living

NAICS

Lawn and Garden Equipment and Supplies Retailers (4442)

SIC

Retail-Building Materials, Hardware, Garden Supply (5200)

akta.pro primary industry

Outdoor Living Structures Retail (Sheds, Gazebos, Pergolas, Greenhouses) (CRAIAIAG)

Keywords

• Aluminum greenhouses
• Garden pavilions
• Terrace canopies
• Wind protection systems
• Pool enclosures

Headquarters

HQ city

Apen

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Product Sales - Greenhouses and Garden Structures: Primary revenue from manufacturing and selling greenhouses, pavilions, terrace roofs, winter gardens, wind protection systems, and carports. Products sold as kits for self-assembly or with professional installation. Custom constructions available.
2. Accessories and Parts: Online shop for greenhouse and patio accessories including shading systems, replacement parts, and complementary products
3. Professional Installation Services: Assembly and installation services provided by company's own qualified personnel for customers who prefer turnkey solutions

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels7 records

Core offering

Hoklartherm GmbH is a German manufacturer that designs, produces, and sells premium garden and outdoor living structures made from glass and aluminum at its single location in Apen, Lower Saxony. Its product range covers greenhouses, rotatable glass pavilions, wind protection systems, terrace and patio canopies, conservatories, carports, swimming pool enclosures, awnings, and balcony/terrace growing solutions, sold both as standardized kits and as custom-engineered constructions.

Product overview

Hoklartherm GmbH is a German manufacturer specializing in garden constructions from glass and metal, operating since 1982. The company develops and produces its own aluminium profile systems (approximately 450 profile cross-sections) at their Apen, Lower Saxony facility. The product portfolio centers on five main categories: (1) Greenhouses including Bio-Top, Arcus, Livingten, Terra balcony greenhouse, Judith Rakers Collection, cold frames and raised beds; (2) Pavilions featuring rotatable Rondo series (VK dome roof, Rondo-Solar, VP pagoda roof), Classico, and Teehaus models; (3) Wind protection systems including mobile Flower-Line with built-in benches and fixed glass elements; (4) Patio roofs and canopies including Berlinada, Pagodendach, carports, swimming pool enclosures, MULTIRAUM sliding elements, and awnings (HK 200 interior, HK 500 exterior); and (5) Conservatories and summer gardens including Solarveranda Berlin. Products are available as standard models or as custom constructions, with the company's modular system allowing flexible configurations and modifications. An accessories shop offers shading, planting tables, and decorative elements.

Differentiator

Problem solved

Functional benefit

Products and services

• Greenhouses (Gewächshäuser) Freestanding, glass, lean-to, balcony, and specialty aluminum-framed greenhouses for private gardeners and hobby growers, with various glazing options and modular configurations.
• Arcus Greenhouse (Rundbogengewächshaus Arcus) Arched greenhouse with continuously adjustable sliding side windows that can be moved up to the roof or underneath each other, creating side entrances; available in S (2×2m), M (2.45×3m), and L (3×4m) sizes.
• Livingten Greenhouse Living greenhouse in conservatory-style design with a modular system for self-assembly, featuring lounge-style aesthetics for garden living spaces.
• Balcony/Terrace Greenhouse Terra Compact balcony/terrace greenhouse approximately 1.70m long × 0.90m wide × 0.60m high, total height 2.30m, suitable for loggias, rooftop terraces, or small gardens.
• Judith Rakers Collection (Home Farming Greenhouses) Exclusive greenhouse collection developed in collaboration with TV host Judith Rakers, featuring Homefarming models Jack, Lotti, Luis, Charlie, and Günter.
• Cold Frames & Raised Beds (Frühbeet & Hochbeet) Cold frames and raised beds for hobby gardeners, including the Rudi cold frame and Gerno raised bed on castors with aluminum construction.
• Pavillon Rondo VK (Rotatable Dome-Roof Pavilion) 360° rotating pavilion with dome roof design, featuring two movable half-shells, thermodynamic wind turbine fan, and aluminum construction; available in diameters from 3.31m to 8.53m, starting from €14,500.
• Pavillon Rondo-Solar (Rotatable Solar Pavilion) Rotatable glass pavilion with dome design, standardly consisting of two half-shells rotatable with or against each other; usable as garden pavilion, swimming pool, or hot tub enclosure; diameters from 4.62m to 7.22m, starting from €23,700.
• Pavillon Classico (Rotating Nostalgic Pavilion) Round nostalgic-style pavilion with 360° rotation, thermodynamic wind turbine fan, and two opposing double sliding doors; available in S (3.31m) and L (3.94m) models, starting from €14,500.
• Rhönrad-Sitzbank (Circular Covered Bench) Circular covered bench seating 4-6 persons with integrated table, aluminum construction, and transparent polycarbonate roof; 4-seater (1.25m wide, 2.20m diameter) and 6-seater (1.85m wide, 2.20m diameter), starting from €1,940.
• Wind Protection Systems (Windschutz) Wind and privacy protection systems including fixed and mobile glass/metal elements for terraces and balconies.
• Flower-Line Mobile Wind Protection Mobile wind protection system on rollers with built-in planter box and safety glass panels; models include Rhodos, La Palma, and Gomera; usable as seating bench or planted windbreak.
• MULTIRAUM Sliding Elements Sliding glass elements for flexible room division between indoor and outdoor spaces; wing weights up to 100kg, variable heights, high sound insulation, integrated insect protection, and corner variants; suitable for terrace roofs and freestanding constructions.
• Patio Roofs (Terrassenüberdachung) Terrace roofing solutions including freestanding and wall-mounted options in aluminum and glass; models include Berlinada, Ammerland, Friesland, Florenz, and Pagodendach.
• Pagodendach (Pagoda-Style Canopy) Multi-faceted pagoda-style roof canopy ideal for corner constructions and garden centerpieces; available in depths 2.50m-4.50m and widths 3.50m-5.00m; glazed with impact-resistant Plexiglas in anthracite grey, white, fir green, white aluminium, or dark brown.
• Carports Aluminum and steel carports for 1-2 cars up to XXL constructions for motorhomes and up to 10 cars; available with aluminum or steel substructures and plastic glazing or VSG safety glass.
• Swimming Pool Enclosures (Schwimmbadüberdachung) Swimming pool enclosures in various shapes including Borkum, Sylt A/B, Doppel-Berlin, and Rügen models; made from aluminum profiles with ISO-hollow chamber panels or Plexiglas; Rondo pavilions also used as pool covers.
• Awnings (Markisen) Professional awnings including HK 200 interior shading with spring tension system and HK 500 exterior shading with glass-fiber reinforced plastic rollers; available as cassette, semi-cassette, or tube awnings; wind resistance certified to wind class 2 (up to 38 km/h).
• Conservatories & Summer Gardens (Wintergärten & Sommergärten) Conservatories and summer gardens including uninsulated conservatory designs for year-round garden enjoyment.
• Solarveranda Berlin Solar veranda with curved form adapting to any architectural style, featuring patent-certified KST (power-assisted sliding technology) for large glass sliding panels.
• Front Door Canopies (Haustürvordach) Front door canopies providing weather protection at entrance areas.
• Professional Installation Service Assembly and installation services provided by Hoklartherm's own qualified personnel for customers who prefer turnkey solutions rather than self-assembly kits.

Quantifiable outcome

• Water up to 5-7°C warmer than open pool in covered swimming pools, reducing heating costs
• +2 more outcomes

Named customers7 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators6 records

Recent moves10 records

Expansion highlights5 records

Broad incumbents

• Keter: Global leader in resin-based outdoor storage, furniture, and garden structures. Comparable in outdoor garden structures category with broad retail distribution; competes in adjacent segments (storage, furniture) rather than premium aluminum greenhouses.
• Palram Applications: Israeli-headquartered global manufacturer of polycarbonate and aluminum greenhouses, patio covers, and outdoor structures. Comparable in core product category but operates at significantly larger scale with mass-market distribution across multiple continents.

Emerging players

• Solarlux: German specialist in glass sliding walls, winter gardens, and conservatory systems for premium residential and commercial applications. Comparable in premium glass/aluminum conservatory and winter garden category, with overlapping MULTIRAUM-style sliding element technology.

Regional players

• Rion Greenhouses: Israeli-based manufacturer of hobby greenhouses distributed primarily in North America and select international markets. Comparable in greenhouse category but operates in different geographies (North America focus) than Hoklartherm's European base.

Direct peers

• Beckmann GmbH: German manufacturer and supplier of greenhouses, raised beds, and garden accessories. Comparable as a domestic German greenhouse supplier targeting private gardeners through retail and online channels.
• Vitavia: Greenhouse brand owned by Palram, sold across European DIY and garden retail channels. Directly comparable to Hoklartherm's greenhouse range but positioned at lower price points with broader retail distribution — represents the mass-market alternative Hoklartherm differentiates against.
• Weka Holzbau: German manufacturer of wooden garden houses, pavilions, and outdoor structures. Comparable as a domestic German manufacturer of premium garden buildings with direct-sales channels, though focused on timber rather than aluminum/glass.
• Biohort GmbH: Austrian manufacturer of premium metal garden sheds, storage solutions, and outdoor structures. Directly comparable in metal outdoor structure manufacturing, premium positioning, German-speaking market presence, and direct-to-consumer sales approach.
• Juliana Drivhuse: Danish greenhouse manufacturer offering a broad range of freestanding and lean-to greenhouses across Europe. Closely comparable to Hoklartherm in product category (aluminum greenhouses for private gardeners), distribution (direct/retailer), and target segment, though more mass-market positioned.
• GFP (Garten- und Freizeit-Produkte): German specialist in greenhouses, garden houses, and outdoor structures with extensive online and retail distribution. Direct peer serving the same German private-garden-owner segment, with broader product breadth and more mass-market price points.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Instagraminstagram.com/hoklartherm
• Facebookfacebook.com/Hoklartherm.GmbH
• LinkedInlinkedin.com/company/hoklartherm-gmbh

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 Hoklartherm GmbH