The firm was started by William Prescott OSMOND and Barry LANGE.
Recorded in 1991 as of address 1st Floor, Hyde West, 2 Abury Road, Hyde Park, Johannesburg, Transvaal with Branch offices in the Cape Province in Bisho, Cape Town, East London Kingwilliamstown and Umtata.International offices were located in Gaborone, Botswana; Maputo and Beira, Mozambique and Harare, Zimbabwe. The then Directors are recorded as being FG BURKETT, MJ DOVEY, RH DRAKE, B DU TOIT, FOURIE, AR FURNESS, MR GOLSWAIN, FD HAARHOFF, RM LATIMER, ML KRUGER, UKL PULITZ, EMJ VLEMINCKX, PW WHITEHEAD and GL WILSON
In 2010 the Managing Director was Michael John DOVEY, the other Directors being Victor UTRIA ARCINIEGAS, Fred George BURKETT, David Alistair CURRIE, Deon VAN ONSELEN, Paul William WHITEHEAD and Graham Lindsay WILSON. The Associates in 2010 were Amanda L JAGER, Johan J FOURIE, Frik J LANGE and William A MARTINSON.
There were then offices in Johannesburg, Durban and East London.
BKIA Award for Architecture - 2011
An Award for Architecture was conferred on OSMOND LANGE ARCHITECTS & PLANNERS for a Heritage Impact Assessment written by William MARTINSON of the Nelson Mandela Museum – Bhunga Building in Mthatha for the Department of Public Works. Read citation All truncated references not fully cited in 'References' are those of Joanna Walker's original text and cited in full in the 'Bibliography' entry of the Lexicon. List of projects With photographs
 With notes
3 Melrose Boulevard: 2007. Melrose Arch, Johannesburg, Gauteng - Architect
| All Saints College: 1985. Bhisho, Eastern Cape - Architect
| Building I3: n.d.. Melrose Arch, Johannesburg, Gauteng - Architect
| Central Terminal Building at OR Tambo: 2009. Johannesburg, Gauteng - Architect
| Clicks Distribution Centre: 1997. Centurion, Gauteng - Architect
| First National Bank: 1994. Bhisho, Eastern Cape - Architect
| First National Bank: 1994. Butterworth, Eastern Cape - Architect
| First National Bank: 1990. Qonce (King William's Town), Eastern Cape - Architect
| Hotel Edward: 1937 : c1970. Durban, KwaZulu-Natal - Architect 7th floor Added 1996
| House GC Baker: 1958. Bonnie Doon, KuGompo City (East London), Eastern Cape - Architect
| House Lange: 1957. KuGompo City (East London), Eastern Cape - Architect
| House Robinson: 1963. Beacon Bay, KuGompo City (East London), Eastern Cape - Architect
| Jalamba Clinic: 2011. Tafalehashe, Willowvale, Eastern Cape - Architect
| Joycom Flats: c1945. Southernwood, KuGompo City (East London), Eastern Cape - Architect
| Kennaway Hotel: 1964. KuGompo City (East London), Eastern Cape - Architect
| King Dinizulu Hospital: 2008. Durban, KwaZulu-Natal - Architect
| King George V Hospital: 2008. Durban, KwaZulu-Natal - Architect
| Maritime Museum: 2018. Port Shepstone, KwaZulu-Natal - Architect
| Melville Heights: 1964. Southernwood, KuGompo City (East London), Eastern Cape - Architect
| Mlungisi Community Commercial Park: 2013. Stutterheim, Eastern Cape - Architect
| Natalspruit Hospital: 2011. Vosloorus, Gauteng - Architect
| Natalspruit Hospital: 2011. Vosloorus, Gauteng - Lead Architect
| Nederduitse Gereformeerde Kerk: 1992. Gonubie, Eastern Cape - Architect
| Nelson Mandela Youth and Heritage Centre: 2007. Qunu, Eastern Cape - Architect
| Nestle Distribution Centre and Offices: 1999. New Germany, Durban, KwaZulu-Natal - Architect
| Nestle Distribution Centre and Offices: 2002. Longmeadow, Johannesburg, Gauteng - Architect
| New Colonnade: 1986. KuGompo City (East London), Eastern Cape - Architect
| Rhodes University, Eden Grove: n.d.. Makhanda (Grahamstown), Eastern Cape - Architect
| Russell Square : 1966. Southernwood, KuGompo City (East London), Eastern Cape - Architect
| SENMIN International: 2016. Sasolburg, Free State - Architect
| Tyamzashe Building - Civic Square: 1985. Bhisho, Eastern Cape - Architect
| United Building Society: 1951
. KuGompo City (East London), Eastern Cape - Architect
| University of Fort Hare, De Beers Centenary Art Gallery: 1990. Dikene (Alice), Eastern Cape - Architect
| University of Fort Hare, Staff Amenities Building - Staff Centre: 1985. Dikene (Alice), Eastern Cape - Architect
| Vincent Park Shopping Centre: 1970. KuGompo City (East London), Eastern Cape - Architect
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References Chipkin, Clive M. 2008. Johannesburg Transition - Architecture & Society 1950 - 2000. Johannesburg: STE Publishers. pp 454
| Images Publishing Group. 1991. Architects of South Africa (International profile series). Melbourne, Australia: Images Pub. Group. pp 82-83
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