In The Hague, Wesstra found employment as architect for the more than 120 projects in construction and conversion of villas residential storehouses and mansions for the period 1876-1905. A period in which the Neo-Renaissance as an applied architectural style caused furor. About Wesstra the architectural historian Roy van Zuydewijn wrote in 1970; the master builder who enriched The Hague with most in fin siècle architecture is H. Wesstra Jr. who was rather suddenly chosen for large commissions. His method of design fits entirely into the romantic image of the neo-styles; picturesque domes and turrets crowning richly oriented brick facades with numerous stone blocks and other ornaments. ~This enriched the city of The Hague with a Panorama building (1881) on Bezuidenhoutseweg, a café-restaurant called "Seinpost" in Scheveningen (1886). The concert hall - executed in fanciful Moorish style - in the former Hague Zoo (1893). A church building on Lange Beestenmarkt and further monumental villas and mansions on Bankaplein, the official residence of Mayor Patijn, Bankastraat, van Stolkpark and Groot Hertoginnelaan. In Scheveningen, villa construction arose on Badhuisweg and Nieuwe Parklaan mainly. ~Together with architect van Wijk, Wesstra supplied the ground plan for a new shopping phenomenon; The Hague Passage, which was to be built between 1882 and 1885. With H.P. Berlage, an insurance office was erected for "De Nederlanden van 1845," at Kerkplein.