
Your guide to Heidelberg Gauteng

#Mr Dettmann's House
Heritage Blue Plaque #Nr 45
MR DETTMANN'S HOUSE - 23 Pretorius Street
What is the story here?
The house was possibly built around 1896. Johann Friedrich Wilhelm Dettmann was born on the 25th of January 1856, in Germany. His father was Johann Dettmann and his mother, Frederike (nee Thede). Dettmann married Christiana in Stutterheim on September 30, 1860. They had eight children. Dettmann was a master wagon builder. Dettmann owned the shop at the corner of HF Verwoerd (Church Street) and Voortrekker street (Market Street).
THE HISTORY OF THE DETTMANN STOREFRONT AND THE VAN DYK PRECINCT
THE BLUE PLAQUE RECOGNITION AND ARCHIVAL CORRECTIONS (2022)
The historic property anchoring the early trading landscape of the town was formally recognized on 1 April 2022. During an official civic ceremony, the Heidelberg Heritage Association - represented by local historian Mr Tony Burisch - awarded a prestigious Blue Heritage Plaque to the contemporary property custodians, Tom and Magda van Dyk.
While modern neighbors, including a long-term resident of Marais Street named Mr Pienaar, traditionally associated the main residential building directly with the prominent early merchant family, subsequent architectural research has clarified the layout. Specialized spatial tracking conducted by local historians Sybrand van der Spuy and Danie Steenkamp reveals that the primary family residence of Mr Dettmann was actually located elsewhere along Van der Westhuizen Street, identifying this specific gabled site as the family's primary commercial storefront enterprise.
THE HISTORIC OUTSPAN AND LAND DEVELOPMENT
During the late 19th and early 20th centuries, the extensive plot positioned immediately adjacent to the commercial building functioned as a vital logistics node for regional transit riders, operating as a dedicated "outspan" (uitspan) station for transport riders and teams of heavily laden oxen.
The draft animals would wade into a specialized natural loop formed by the historic Dorpsspruit stream, which cut directly through the grounds, providing a reliable source of fresh water while the teams rested.
When Tom van Dyk originally acquired the historic estate in 1988 alongside his first wife, Martie van Dyk, the adjacent outspan stand remained entirely vacant, filled only by mature pioneer peach orchards and the dried remnants of the stream's original water loop. The historic terrain was subsequently filled in, leveled, and systematically closed off during modern commercial development projects in the town center.
THE BOERE WINKEL LANDMARK AND SCHOOL CHILD TRADITIONS
The commercial building was widely celebrated across the district for its magnificent interior craftsman architecture, featuring elaborate hand-carved woodwork throughout the main trading hall. For decades, the storefront operated as a vital retail hub for local school children.
Local oral history preserves the childhood memories of Alta Bester (the wife of Oom Toekie), who shared with Magda van Dyk the excitement that defined the morning school routine in Afrikaans:
"Ek het baie lekkers by daardie winkel gekoop. As die bus in die oggende gestop het by die skool het ons kinders gehardloop vir vissies, appelkosies en Wilson toffies. Daar was die mooiste houtwerk in daardie gebou."
(I bought many sweets at that shop. When the bus stopped at the school in the mornings, we children would run for fish-sweets, apricot-sweets, and Wilson toffees. There was the most beautiful woodwork in that building.)
A prominent architectural feature of the historic storefront was a dedicated rooftop bell tower structure. The original bronze shop bell was later salvaged from the tower and mounted onto a custom display stand inside the garden of the prominent castle-style residence situated along the Benoni Road, where it remains preserved as a private historical artifact.
The trading property transitioned into the contemporary hospitality sector when Tom van Dyk founded the successful Van Dykshuis Guesthouse on the premises in 1999, sensitively adapting the historic rooms to serve modern travelers.
THE DETTMANN BURIAL RECORD (1933 - 1943)
The pioneering generation who established the business managed the storefront through the turbulent transitions of the early municipal era. Mr Dettmann passed away on 3 November 1933, and his wife, Christiana Dettmann, survived her husband by nearly a decade, passing away on 24 July 1943. Both pioneers were returned to the town center and buried alongside one another within the historic family plot at the Heidelberg Kloof Cemetery.
SOURCES AND CREDITS
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Primary Historiography: Derived from the heritage property feature article written by journalist Eugene Viljoen, published in the 6 April 1922 edition of the Heidelberg Nigel Heraut.
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Oral History Archives: Supplemented by the personal historical records of Tom van Dyk, and the oral testimony files of Sybrand van der Spuy, Danie Steenkamp, and Alta Bester.








