In the 1970s a small cul-de-sac was created in the grounds of a period house on Mount Merrion Avenue. The new road was named Brookfield and No 1, which faces on to Mount Merrion Avenue, is on the market for the first time in nearly 30 years as the owners prepare to downsize.

When they bought the redbrick detached house it was a very different property both inside and out. They extended to the side, making the house double-fronted and then later extended again to the rear, adding a sunroom and again further to the side to create a large family room – it used to be a games room for the family of boys who lived here.

At 277sq m (2,982sq ft) it is a large house. There are two reception rooms on one side of the wide bright hall, the rear one opening out to the small lawned garden. On the other side of the hall is the more used part of the house – an open-plan area that includes the kitchen to the front and a living area to the rear that opens into the sunroom.

The painted timber units in the kitchen could easily be updated with a new coat of paint and they are topped with polished granite worktops. The range cooker is set in a bare-brick chimney – a style feature that’s also in the living area and the former games room, which has now been furnished as another comfortable living room complete with striking red stove.

There are four double bedrooms – there were five but one was converted into a large bathroom en suite for the main bedroom. It has a corner jacuzzi bath and space for a shower if new owners so wish. There is an attic room over the side extension that will probably be used by new owners – as it is now – as a fifth bedroom.

The extensions ate into the outdoor space so the rear garden is relatively small for such a large house. There is parking for four or five cars outside and the house is well-screened from the road, behind tall hedging and trees. Mature trees at the rear also make the back garden feel secluded.