Gilligaloola is a heritage-listed residence located on the 82-84 Pennant Hills Road, Normanhurst, in the Hornsby Shire local government area of New South Wales, Australia.

The following obituary taken from the 16 October 1911 edition of The Sydney Morning Herald described the significant contribution that Selfe made at the turn of the century:[1] "BRIDGE BUILDER.

A pioneer bridge builder, a public spirited citizen and an engineer who played no unimportant part in the building up and remodelling of Sydney died yesterday in the person of Mr. Norman Selfe.

For several years afterwards, until the partnership was dissolved he was the responsible officer of this firm for the design of hundreds of engineering works carried out, many of them under contract for the NSW Government.

He was afterwards the superintending engineer to two kerosene companies designed and carried out the mining plant, with the mountain railway and incline at Hartley Vale; as well as the works at Waterloo and the North Shore.

This position he held for a number of years until by the kind co-operation of the late Thomas Sutcliffe Mort, an industrialist, he commenced private practice.

Mr Selfe visited 70 cities in Europe and the United States and made himself acquainted by personal observation with great engineering works in two hemispheres.

He patented a new system of wool pressing which revolutionised the business by increasing the capacity four fold and has carried out number of hydraulic and electric light installations in the city.

Nearly all the deep sea wharfs at the north end of the city of Sydnev have been reconstructed by Mr Selfe to accommodate modern vessels on entirely now lines introduced by him and with piles of unprecedented size and weight.

When it was proposed in 1873 to construct iron wharfs in Sydney Cove, suitable then only for the berthing of small sailing vessels, suggested to the Government that provision should rather be made there for mail steamers and he was then requested to prepare plans for his scheme.

Later on he was the successful competitor for the North Shore bridge and his design was recommended by the Government Advisory Board and will soon be considered by the Public Works Committee.

Subdivision plans showed lot boundaries particularly close to Gilligaloola and the grounds reputedly contained predominantly intact stylistic and horticultural elements.

[2][1] A majestic Norfolk Island pine (Araucaria heterophylla) over 25-metre (82 ft) high is a prominent landmark of the area and along Pennant Hills Road probably dates from c. 1890.

[1][3] As at 16 April 2013, Gilligaloola was of State heritage significance as the family home of Norman Selfe, the 19th century engineer and innovator, after which the suburb of Normanhurst was named.