O'Brien Quantity Surveyors

OBQS is a firm of quantity surveyors / specialists offering a range of services in domestic and commercial projects throughout Ireland.

About Us

Established in 2006 O’Brien Quantity Surveyors has a wide range of experience in all aspects of construction cost management bringing projects through the full building cycle from feasibility stage to completion, ensuring our clients receive the best cost advice and consequently excellent value for money.

With the ever changing demands of the built environment in particular regarding complexity and timescales we ensure flexibility and efficiency.
We are client focused to ensure that the most cost effective solution is achieved to meet specific tailored customer requirements.

OBQS offers a broad range of professional services, experience and resources in the areas of cost management, procurement, construction contracts consultancy, claims management, dispute resolution and project management.

All projects are carried out by senior members of our team with no less than 10 years plus experience.

We pride ourselves on delivering projects with integrity, reliability, trust and professionalism.


OBQS has been working with Ireland’s leading Architects and Contractors over the last 10 years.

We have successfully delivered a wide range of projects across the various construction sectors; Commercial, Property Development, Residential, Conservation and Retail.

At OBQS we pride ourselves on a very “hands on”, practical approach to streamline a process that delivers construction cost certainty.

We are enthusiastic and client focused about all our projects and are extremely flexible and adaptive to deliver the results required.

We are committed to achieving the highest possible industry
standards and have a unique awareness of the client’s changing needs.

OBQS are a positive company with a solution-orientated attitude; we have consistently performed over the past 10 years and have a vision and mission statement to further our commitment and contribution to our clients and the industry.


Lisa O’Brien

B.Sc. Hons Construction,
Economics & Management
Diploma in Construction Technology
Certificate in Construction Technology
Post Grad Dip. Applied Building Repair & Conservation

Lisa O'Brien

Lisa O’Brien founded O’Brien Quantity Surveyors in 2006 providing a professional and personal service to both private clients and contractors. Lisa has a solid background in construction graduating from Bolton Street DIT with a Diploma in Construction Technology in 2000.

Lisa completed her Bachelor of Science Degree in Construction Economics graduating with an Honours degree in 2004.

Lisa started her career with Healy Kelly and Partners (Turner and Townsend) a professional quantity surveying practice before moving on to the contracting side of the Industry working with blue chip companies such as G&T Crampton; she gained extensive knowledge as a Senior Surveyor on large-scale developments.

In 2006, Lisa completed a Post Graduate Diploma in Applied Building Repair & Conservation in Trinity College Dublin. Lisa has a “hands on” and practical approach to all projects.

For over 10 years, the Company client base has ranged from private domestic clients to international blue chip companies.

OBQS, under Lisa’s stewardship has successfully delivered projects across all sectors of the industry including property development, conservation, residential, retail, office fit out and healthcare.

Lisa is a highly motivated individual and brings an innovative, pro active and positive approach to all aspects of the business making OBQS a vibrant place to work consistently delivering and exceeding customer expectations on all projects.

Keith Kelliher

External Consultant

B.Sc. Hons Quantity Surveying Diploma in Construction Technology
Post Grad Dip. Arbitration
Post Grad Dip. Adjudication Accredited Mediator
Certified Diploma in Loss Adjusting (CIP) Fellow of Chartered Institute of Arbitrators Member of Insurance Institute of Ireland

Keith is a highly experienced and motivated quantity surveyor and dispute resolver who specialises in the construction and general commercial arenas.

Since 1998, Keith has been providing quantity surveying expertise to a broad range of clients including main contractors, sub-contractors, developers, individuals, corporate and public entities.

Keith’s expertise has involved projects including the M50 and M1 motorway projects, the Luas extension projects, residential and commercial property developments, commercial fit out projects (including offices, public houses and restaurants), private domestic projects and conservation projects, including works to the Carriglass estate in Longford and various protected and listed
properties in Dublin.

Keith is vastly experienced in dispute resolution and has provided general dispute resolution services to various clients including advocacy and appointments to act as an Arbitrator, Conciliator and Mediator.

Keith is also fully trained to deal with the Construction Contracts Act as adjudicator and is an active committee member of the Irish Branch of the Chartered Institute of Arbitrators.

Room to Improve

Lisa has been the resident quantity surveyor on RTÉ One’s popular renovation show “Room to Improve” for series 10 (2017) and series 11 (2018) given the task of keeping Architect Dermot Bannon within the homeowner's budget ... which is no easy task! Lisa has tracked up and down the country from world famous entertainer Daniel O Donnell and Majella O Donnell’s house in Donegal to  dairy farmer Paraic and wife Katie’s beautiful traditional farmhouse in Tipperary. Managing homeowner's expectations and Dermot Bannon's inspirations whilst holding the purse strings has been a challenging role but one Lisa has enjoyed during her time on the show. Go to Gallery



Professional Quantity Surveying Services

Feasibility Study – initial Budgets from Scheme Designs and client concepts

Value Engineering – identifying potential cost savings and advising on more economical construction solutions

Tender Documentation – preparation of pricing documentation to go out to tender

Tender Analysis – analysing returned tenders and issuing recommendation for contractor selection

Contractor Negotiation – negotiating on cost with Main Contractor before Contracts are signed

Post-Contract Cost Control – recommendations for contractor payments & valuing variations

Final Account Negotiation

Measurement & Re-measurement of Quantities

Building Contract Advise

Cash Flow Forecasts

Specialist Services

Conservation & Refurbishment of Historic Buildings – Surveys and cost reports

Local Government Grant Application

Dispute Resolution – Arbitration and Mediation services

Project Management

Contractor & Sub-Contractor Quantity Surveying Services

Estimating and Tendering

Valuations – identification of variations

Measurement & Re-measurement of quantities

Cost Control

Material measures

Cost Reporting

Final Account submissions and settlements

External Services

BER Certification & Advice

Fire Certificate Applications & Advice

Full range of Engineering Services

Full range of Architectural Services

Full Domestic and commercial Snagging Service

Land & Site Surveys including mapping

Archaeological Survey

Loss Adjusting Services

Building Workshop

Lisa O’Brien and her longstanding colleague, Keith Kelliher, together presents an in-depth information day covering all aspects of the building process from new builds, home renovations, extensions and attic conversions. This is an essential step by step guide which will provide the attendees with a level of knowledge to confidently navigate the building process.

Course Content will include the following topics:

Introduction to the Construction Industry 

Choosing Construction Professionals – their roles and responsibilities

Starting your project – current statutory regulations and obligations

The Stages of the Building Process – scheme design, cost plan, tender process, tender analysis, contractor selection, contract award and signing; post contract- building phase; final certification and final account

Material Selections and Specification – Alternatives to meet with budgetary requirements

Standard Building Contracts – RIAI standard forms explained

Finance – Mortgage Requirements; SEAI Grants, HRI – Home Renovation Initiative

Insurance – Self build, Contractors All risk

For Further Information or to register your interest please contact:

P 086 2154997
E keith@keisa.ie

P 086 6018572
E lisa@keisa.ie


Contact Us

O' Brien Quantity Surveyors

Unit 1,

North Park,


 Dublin 11

086 601 8572


Opening Hours

Mon - Fri: 8am - 6pm

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