| 1945 | School founded by Miss Margaret McNab Taylor in No. 7 Walpole Road |
| 1947 | No's 1 & 3 Walpole Road bought |
| 1949 | No 9 Walpole Road bought |
| 1951 | No 15 Walpole Road (East) bought |
| 1952 | No 15 Walpole Road (West) bought |
| 1955 | The Educational Trust Hamilton Lodge (Brighton) Ltd. Established |
| 1959 | Two classrooms/speech rooms built at the rear of No 15 |
| 1963 | Science room built at No 15 |
| 1964 | Miss Margaret McNab Taylor died on Tuesday 19th November 1963 at Worthing Juvenile Court. Funeral took place on Saturday 23rd November 1963 at 12 noon at St Anne's Church, Brighton. Mr John Jansen appointed Principal. |
| 1965 | Principal's house built behind No 15 |
| 1966 | School recognised by the Department of Education and Science |
| 1967 | James Wing, containing classrooms, gym/assembly hall and covered play area, opened by the Duchess of Norfolk |
| 1969 | Library in No's 7 & 9 opened |
| 1970 | 25th Anniversary of the school No 13 Walpole Road bought to provide two classrooms, art room, pottery room and dressmaking room |
| 1972 | No 1 extension built to provide surgery, sick-bay and reception classroom |
| 1973 | Part possession of 1B Walpole Terrace for staff accommodation |
| 1975 | Playing fields carved out of steep downland beside the lane between 7 & 9 |
| 1976 | New boiler room constructed at the back of No 1 |
| 1977 | Full possession of 1B Walpole Terrace Dining room, kitchen & cloakrooms created on ground floor of No 1B and lower ground floor of No's 1 & 3 Play area created at back of No 1 Home economics room created in No 1B |
| 1978 | Miss Margaret Moore appointed Principal Improvements to the top floor of No 7 |
| 1979 | No 13 sold to raise much needed capital Further Education and Post 16 Department established, based at No 15 |
| 1981 | The Bill Simmons Craft room created out of two small classrooms at the rear of No 15 The Tregenza Room, showers and changing rooms created out of the undercover play area beneath the James Wing |
| 1985 | Two speech cabins installed, one behind No 1, the other behind No 9 |
| 1987 | The tree garden created to provide private access to the playing fields |
| 1991 | The adventure playground created at the back of No 9 |
| 1992 | The playroom at No 1 refurbished The astro turf pitch created on the side of the old tennis courts on the playing fields |
| 1993 | Home economics room moved up to No 15 into new extension at the back New classroom created at No 1B in place of the old Home Economics room |
| 1994 | Floodlights installed on the new astro turf pitch Science room in No 9 refurbished No 10 Arundel Road purchased and refurbished for a F.E. Hostel |
| 1995 | 50th Anniversay of the school
Mrs Anne Duffy appointed Principal from September 1995
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| 1997 | No 15 extension built and re-organisation to No 1 and No's 7-9 buiodings. This achieved separate residential and school accommodation for secondary pupils. Funded by Lottery grant |
| 1999 | New bath and shower rooms in No 1 Sale of No 10 Arundel Road and change from F.E. to Yr 12 |
| 2000 | Work on Head's House for Yr 12 students' accommodation |
| 2001 | The School achieved non-maintained special school status. Hamilton Lodge Education Ltd established |
| 2002 | No 11 Walpole Road purchased to extend post-16 accommodation School achieved 'Excellence Award' from the DfES |
| 2004 | New Design & Technology and Primary facilities built at the rear of No 9. This building has been named 'The Miles Building' and was officially opened by Councillor Pat Hawkes. Separate residential and school accommodation finally achieved for all pupils. Adventure playground moved to the rear of No 11 |
| 2005 | Bill Simmons Craft Room converted for community amd meeting use School achieved 'Positive about Disability Award' 60th Anniversary of the School Mr Christopher Owen appointed Principal from September 2005 |
| 2007 | Mr Sheppard appointed Principal/Head teacher from April
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History of HLS 
