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1. Advice and Development

Functional and design-oriented in all materials for the economic realization of your vision

2. Planning und detailing

Individually, professionally and adapted to the special installation situation of your object with the most modern CAD technology

3. Made in Berlin

Fast, flexible with state-of-the-art CNC technology with the highest quality

4. Delivery and installation

Delivery: with our own trucks and just-in-time to the construction site
Assembly: reliable and professional with own technicians

5. Customer Support

With our own specialists we maintain and service your windows individually and adapted to your appointment requirements


Windows made in Germany for architects, builders and planners

The company Hans Timm Fensterbau is well-known across the borders of Berlin throughout Germany as a manufacturer of high-quality windows. Our windows fulfill an unconditional demand for quality, design, material and inspire builders or architects worldwide.
Our experienced team advises, plans, develops, manufactures and assembles windows and facades with a high architectural, technical or preservation requirements.
Single window or major project, we build with excellent and high-quality craftsmanship.

Promise of quality to our clients


We support you with project-related consultations in the implementation of your architectural visions in professional and economical solutions. With our wide range of materials like wood, plastic, aluminum, steel and glass, we offer unique possibilities of designing window and façade elements. Together with you, we see ourselves as a cooperative team that develops the optimal solution.
Your Vision, our solutions.


Design, function and efficiency are the three main pillars in our planning and realization of your needs and wishes. Unimaginable thinking and no limits is one of our great strengths. We plan windows across materials (regardless of whether wooden windows, wood-alu windows, aluminum windows, steel windows) and all versions of windows in our own three plants in Berlin on state-of-the-art machinery.


In one of the most modern CNC machine parks in Europe, we manufacture our window and façade constructions at three plants in Berlin. This guarantees you high reliability with simultaneous flexibility, as well as high quality with simultaneous scheduling and cost optimization. Whether it’s about the quality of our design, our raw materials, our finishes or our services: We want the best in everything we do for you as a customer. Quality in every detail.


A well-planned and manufactured window is only perfect if it is carefully and professionally mounted and reliably fulfills its task for years. We have highly trained specialists with many years of assembly experience. Our technicians are trained to deal with heavy, large-scale window and facade elements. When dealing with tenants in the renovation of inhabited objects, we have a great deal of experience in both assembly and maintenance, in order to enforce your interests as an architect or client accordingly.

Product highlights and innovations

New window systems with narrow face width and best ease of use

Wood windows

Combination of traditional and modern craftsmanship

Aluminium windows

Puristic design and functionality

Steel windows

Industrial design with narrow face width

Villa 1

The listed villa was built in 1907 by Hart & Lesser for the banker Julius Erxleben. It is an exceptionally monumental and playful-looking plaster construction with a roof landscape which is typical for these architects. Striking are the numerous small-sized windows with different shapes and proportions. With elaborate planning and coordination of the monument protection, we designed and installed new, monumental box windows, historical single windows W56 as well as wooden insulating glass windows W90. Nevertheless, the highest safety standards were implemented in the designs of the most diverse constructions. Furthermore, a large number of historic windows were retreaded according to the HO.09 guideline.

Villa 2

In the residential building and in the pavilion, post-and-beam facades in the Raico system in wood-aluminum and aluminum with integrated wood-aluminum windows (block window) were designed. In the large living room facades, lift-and-slide door systems were integrated into the mullion-and-transom facades. Thermobuche colorless glazed (walnut character) was used as wood . The aluminum surfaces have been coated in a bronze metallic paint. The outside sun protection is from the brand Flexalum 88Z. The pavilion roof consists of a steel skeleton construction with ALUCOBOND cladding. The stair railings and garden fences were made of galvanized steel with metallic coating.

Villa 3

The two-storey villa was built in 1922/23 by Hans and Wassili Luckhardt and Franz Hoffmann. The building is the lesser example of expressionism in the berlin architecture. After detailed research in the archives, the monument is carefully restored. Together with the lower monument protection authority and the Landesdenkmalamt Berlin, we endeavored to do justice to Haus Buchthal as an expression of several stylistic epochs. The windows were manufactured and assembled as petrol-colored, three-part wood-wood integral windows, whereby the subsequently installed roller shutter boxes were again awarded the window height. In the annex wood box windows came to execution. Also to be highlighted is the restored entrance portal.

Villa 4

Reproduction, production, delivery and installation of a variety of high-quality wooden window constructions (historic box windows, historical single windows IV56, wood insulating glass window IV90 and folding systems) to meet the requirements of the monument protection and the ideas of the owner. Nevertheless, highest safety standards were implemented in the designs of various constructions. Furthermore, various box windows were retreaded according to the guideline HO.09.

Welcome to our new showroom.
come and explore the virtual 360° tour of our window experience center

Most innovative solutions in industry

On more than 850 m² exhibition space we present you in our showroom over 60 exhibits of our newest and most innovative solutions in the industry. Experience different versions from wooden, wooden-alu, aluminium, steel to mullion and transom façade, lift and slide door systems or security windows. Architects, builders and partners in contract business have the opportunity to experience all kinds of design and finishing and see our wide product range. We warmly invite you to enjoy our Showroom to plan and realize your project.

View Showroom

Your are anarchitect or builder and want to look around in our showroom? Arrange a personal consultation appointment so that we can get to know you properly. We show you our diverse solutions for touching and testing which will surely satisfy you.

Arrange a personal consultation appointment now:

consultation appointment

Consultancy opportunities

Are you unfortunately not be able to visit us we can send you our current planning manual

Further than that you can register to download in the Download area our diverse planning manual or DWG-Data

Any questions? Send an e-mail to anfrage@timm-fensterbau.de or call Tel. + 49 30 720 831- 0 to Mr. Bastian Timm.

Detlef Timm

“We live 24 hours for windows.”

Bastian Timm

“As the third generation, which looks back on over 60 years of company history, I feel a special responsibility. You want to preserve what’s there. But the real task as a successor is to foresee and think ahead.”

Jonas Swiatek

“We want to use the digitization as a supplement to the know-how of our employees for the continuous improvement of quality from consultation to assembly.”

Bernd Timm

“Our customers expect us to be reliable and deliver the highest quality windows.”


The 3rd generation

Jonas Swiatek (son of Detlef Timm) joins the company after completing his studies in engineering at the TU Hamburg-Harburg and completes the 3rd generation.



The 3rd generation

Bastian Timm joins the company after completing a bank education and industrial engineering studies at the TU Hamburg-Harburg.


Plant 2

Commissioning of Plant 2 in Motzener Straße 10, a 3-storey production villa with aluminum and steel windows production and attached administrative and engineering departments.



The 2nd generation

Bernd Timm joins the family business after his training as a carpenter and a wood technology study in Rosenheim.



The 2nd generation

Detlef Timm joins the company after completing an industrial engineering degree at the TU Berlin.



Founding in 1957

Hans Timm founded the “Hans Timm joinery for construction and interior design” on Ludwigkirchplatz in Berlin-Wilmersdorf.