1898 14 August: application for building permission to the local authorities in Saint-Gilles (granted 28 September). December: plans
1899 January: balcony February: balcony, ordered white stone and canopy April: drawings for the first floor May: plans and section drawings for the dining room June: detailed drawings for the stonework July: staircase August: plans for water, gas and central heating September: marble staircase October: ordered blue stones for the pavement December: repointing dining room
1900 February: drawings for railings May: drawings for stained-glass windows in the dining room, ordered shutters June: model for bells
1901 March: study fitted out, sculptors' studio working flat out
1902 January: dining-room doors
Dates of alterations
1906 The house was extended towards the garden: sitting room, 1st floor, 2nd floor (balcony and winter garden) Application for permission 15 May, granted 19 October
1907 Studio cellar enlarged "in order to improve the lighting and ventilation" Application for building permission 24 December (granted 14 January 1908)
1908 Studio enlarged Application for building permission 14 January
1911 Part of the ground floor of the studio converted into a garage
1915-1919 Horta in Britain and the USA
1919 Horta sells both houses and moves to the Avenue Louise
1961 Dwelling house purchased by the Saint-Gilles local authorities
1963 Both house and studio are classified by royal decree
1969 Museum opened
1973 Studio purchased by the Saint-Gilles local authorities; once again the two houses interconnect