independent professional valuations of art and antiques

TAXATA is an independent art and antiques valuation firm, offering professional valuations in a.o. the following areas:

  • European fine art, 1800 – now (with an emphasis on Dutch art)
  • Public art and monumental art
  • European sculpture, ca 1500 – now
  • European decorative art, antiques, historical objects, ca 1500 – now; trade goods from a.o. China and Indonesia
  • Jewellery, 1500 – now
  • Interiors, building components, Europe ca 1500 – now
  • Art and objects with a special provenance

TAXATA has ample experience in professional, substantiated valuations of high value (<25 million euro) objects.


A few highlights include: valuation of paintings by, and historical objects of Pablo Picasso; paintings and drawings by a.o. Jan Sluyters, Theo van Doesburg and George Hendrik Breitner, large scale sculptures by Auguste Rodin and Alexander Calder, monumental artwork by Lex Horn; religious silver and architectural objects by Fa. Brom; jewellery by Faberge and Lalique; et cetera.

RICS Red Book

When a valuation is relied upon by third parties, substantiation of the valuation opinion may be expected, and additional assurances of independence and expertise. TAXATA valuations are done according to the RICS Red Book.


TAXATA was founded by in 2010. Patricia Jansma (owner/director of TAXATA) is RICS registered, Hobeon/SKO certified, and member of the Dutch organisation of valuers, brokers and auctioneers the TMV. Patricia is a member of ICOM (International Council Of Museums), and PAIAM (Professional Advisors to the International Art Market). She has written about valuation for amongst others the Boekman Stichting, and Kluwer (Kwartaalbericht Estate Planning).

Please contact us for more information.