In late 1989 Limerick County Council established, with the support of the Department of the Environment and subsequently the National Roads Authority, a specialist Road Design Team to prepare designs for major road schemes in the Limerick area. The Design Team was based in offices at the former Jesuit College in Mungret, just outside Limerick. In 1992 following agreement with Clare County Council and Tipperary (North Riding) County Council the work of the office expanded to include major improvements on national routes in these counties.

The office is committed to providing a quality service. In the summer of 1995 it was decided to formalise this commitment by pursuing certification to the Quality Assurance Standard ISO 9001. The assessment of the office was carried out in June 1996 by the Irish Construction Quality Assurance (ICQA). Following this a "Certificate of Compliance" was granted.
In 2003 the Office Management System was upgraded to comply with the new ISO 9001:2000 standard. In November 2003 the NSAI certified the office as compliant with this standard.
The office is subject to twice yearly audits bty the NSAI.

Go déanach sa bhliain 1989 bhunaigh Comhairle Chontae Luimnigh, le tacaíocht ón Roinn Comhshaoil agus ina dhiaidh sin ón Údarás um Bhóithre Náisiúnta, foireann Speisialtóirí Dearadh Bóthar chun dearaí a ullmhú do mhór-scéimeanna bóthar i gceantar Luimnigh. Lonnaíodh an Foireann Deartha in oifigí i Mungairit sa sean Choláiste Iosagánach lasmuigh do chathair Luimnigh. Tar éis teacht ar shocraithe le Comhairle Chontae an Chláir agus Comhairle Chontae Thiobraid Árainn (Thuaidh) sa bhliain 1992, cuireadh le ualach oibre na hoifige nuair a tugadh dóibh le déanamh chomh maith an mór-obair feabhsúcháin ar na bealaí náisiúnta sna contaetha seo.

Is mian leis an oifig seirbhís mhaith a chur ar fáil. Beartaíodh an mian seo a chur i gcrích i gcaitheamh an tsamhraidh 1995 nuair a cuireadh chuige an Caighdeán Éireannach ISO 9001 a bhaint amach. Dhein Dearbhú Caighdeáin Tógála Éireann (ICQA) measúnú ar an Oifig i mí Meitheamh na bliana 1996. Ceadaíodh an 'Dearbhú Inniúlachta' ina dhiadh sin.
I 2003, rinneadh uasghrádú ar an gCóras Bainistíochta Oifige chun cloí leis an gcaighdeán ISO 9001:2000 nua. I Samhain 2003 dheimhnigh an NSAI go raibh an oifig ag cloí leis an gcaighdeán seo. Déanann an NSAI dhá iniúchadh sa bhliain ar an oifig."