Previously known as Bothamley & O'Donohue Pty Ltd, we are an established land and engineering surveying firm based in Grafton, with a built up wealth of experience since the commencement of operations in South Grafton in 1985. Now operating from Level 1, 23 Prince Street, Grafton, our next generation of local staff is striving to uphold the renowned quality and responsiveness the firm has become known for. 

We provide a full range of surveying services to the Clarence Valley and Northern Rivers area of NSW including:


  • Project Management

  • Residential, Rural-residential and Rural Subdivisions

  • Boundary Adjustments

  • Roads Act, 1993 Re-alignments & Widenings

  • Strata Developments

  • Council Applications

  • Identification & Peg-out Surveys

  • Detail & Contour Surveys

  • Engineering & Building Setouts

  • Flood & Floor levels

Using up to date field and office equipment and hardware


We provide reliable, efficient, confidential and affordable services to our loyal and very sound client base. We pride ourselves on the professional manner in which all instructions are dealt with and maintain open lines of communications with our clients at all times.


We have been involved in some medium to large sized projects in recent years, with some examples of details of those projects as follows:


  • 99 Lot Staged Residential Subdivision at Grafton

  • 250 Lot Staged Residential Subdivision at Yamba

  • 70 Lot Staged Residential Subdivision at Junction Hill

  • 47 Lot Staged Rural Residential Subdivision at Waterview Heights

  • Yamba Sewerage Scheme

  • Water Supply Route Survey (detail for design, set-out, works as executed & easements) for New Grafton Correctional Centre at Lavadia


The firm has a long association with Grafton, the Clarence Valley and the Northern Rivers of NSW and will continue to provide the same level of service for many years to come.


Level 1, 23 Prince Street Grafton NSW 2460, PO Box 1034

P | (02) 6642 3287  M | 0418 761 165  E | admin@ohassociates.com.au

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