Austinmer's most expensive house is once again on the market.The grand property at 28 The Grove last sold for $4.15 million in June last year.Located in the heart of Austinmer, the site was the location of Sidmouth, Austinmer's first house built in 1837 by Captain Robert Westmacott. Austinmer was originally known as Sidmouth, named in honour of Westmacott's home town on the Channel coast of England.In The Story of Austinmer, historian NS King wrote that the original house stood for nearly 90 years before being demolished in the 1920s. It was replaced by the present house built by a Captain Young who named it "Rathmines"."The cedar, so freely used in the old house and which was so readily at hand when it was built was used to a certain extent in the new one; but most of it was used to build a house in Asquith St for the captain's old batman, Tommy Rooney," King wrote.Simon Beaufils of Ray White Helensburgh, whose agency handled last year's sale, said expressions of interest would close on October 13. "It is a rare species," Mr Beaufils said.The house comprises five bedrooms, a billiard room, gymnasium, pool and attic accommodation.The property is on 7308sqm and also includes a separate self-contained two-bedroom cottage. However there are two sale options.Mr Beaufils said the opportunity existed to purchase the entire property, but a concept plan to subdivide the site into four lots had been lodged.It includes keeping the home and pool on a 2194sqm block, the studio on a 724sqm block and two vacant blocks of 2408sqm and 1981sqm. The property is open today from 1pm.