From the size of it, the house is not than much smaller than Kenwood.
Description for the house when it was put up for sale in 1827:
The late Residence of Joseph Lescher, Esq., deceased, delightfully situated at West-end, Hampstead, a convenient distance from London, and a cheerful ride through the Regents Park to the City; comprised a brick-built family house, containing ? bed chambers, dressing rooms and closets, a dining parlour 27 feet by 17 feet, a drawing room 36 feet by 17 feet, breakfast parlour and hall, and offices of every description, double coach-houses, and stabling for 6 horses, wash house, laundry, and servants rooms.
The gardens are highly productive, with shrubbery walks, lawn, greenhouse and grapery, melon ground, and fish ponds, together with two paddocks of rich land, containing altogether upwards of 6 acres. Copy hold of the Manor of Hampstead, and 4 acres of leasehold adjoining, with a farm yard and buildings.