Senior Quantity Surveyor

Size Group; Henley-on-Thames; On-site; GBP 70,000 - 95,000; Full time

Benefits offered by this job

Competitive salary

Company pension

Private medical insurance

Income protection insurance

26 days annual leave

Travel expenses for site staff

Job summary

Size Group in the United Kingdom seeks a Senior Quantity Surveyor to lead commercial management on high-end prime residential projects. You will drive cost planning, procurement strategy, contract administration, and change management to maximise value.

You will mentor junior colleagues, manage budgets, CVRs, and monthly valuations, while sustaining strong client and subcontractor relationships. A 7–10 year QS track record and JCT experience are essential.

Qualifications

• 7–10 years’ experience in quantity surveying, ideally with a main contractor.
• Senior Quantity Surveyor level with ability to manage projects independently.
• Strong background in prime residential sector; structural experience desirable.
• In-depth knowledge and practical application of JCT contract forms.
• Excellent commercial acumen with strong negotiation and analytical skills.
• Leadership to lead, influence, and challenge at all levels.
• Degree or equivalent in Quantity Surveying or related discipline.

Responsibilities

• Lead cost forecasting, budgeting, and detailed financial reporting across projects
• Take ownership of subcontractor procurement, negotiation, payments, and performance management
• Manage and review monthly valuations, CVR, and commercial reporting
• Proactively manage risk and opportunity registers, providing strategic mitigation and value engineering solutions
• Provide commercial leadership and mentorship to junior team members where appropriate
• Build and maintain strong, long‑term relationships with clients and key stakeholders

Skills

Leadership

Negotiation

Analytical skills

People management

Education

Degree in Quantity Surveying

Job description

Who is Size?

Launched in 2009 as a small construction venture between two friends, Size Group brings together the vital elements of property from the construction of luxury buildings through to the maintenance and management of a property portfolio.

Who is Size?

Launched in 2009 as a small construction venture between two friends, Size Group brings together the vital elements of property from the construction of luxury buildings through to the maintenance and management of a property portfolio.

We now seek a Senior Quantity Surveyor to join our team on a permanent, full-time basis.

The Benefits

This is a great opportunity for a Senior Quantity Surveyor with a construction background to join our forward-thinking and collaborative organisation.

• Competitive salary
• Auto enrolment to company pension scheme (opt-out option available)
• Private medical insurance
• Income protection insurance
• 26 days annual leave
• Travel expenses for site-based staff

You’ll play a pivotal role in delivering high-end, prime residential projects, making this an ideal setting to deepen your experience and accelerate your professional growth.

The Culture

At Size Group our values underpin who we are. They form an important benchmark for everyone – collectively and individually. We are:

Empathetic - People-driven and focused

Tenacious - Relentless pursuit of the highest standards

Integrity - Integrity earns trust. Trust builds relationships

Entrepreneurial - Self-starters that push beyond the obvious

We boast a culture that is focused on training and development, career paths and internal progression. What’s more, we’re committed to our employees and offer a range of benefits to support your lifestyle both in and out of the workplace.

The Role

As a Senior Quantity Surveyor, you will take a leading role in the commercial management of our projects, ensuring robust financial control, governance, and compliance throughout the project lifecycle.

Reporting to the Commercial Manager, you will be responsible for overseeing all commercial aspects on your projects, providing strategic input to maximise value, manage risk, and drive performance. This will include leading on cost planning, procurement strategy, contract administration, and the management of change.

Working collaboratively with clients, subcontractors, and internal project teams, you will ensure commercial objectives are achieved, budgets are controlled, and JCT contracts are administered effectively and in line with best practice.

Additionally, you will:

• Lead cost forecasting, budgeting, and detailed financial reporting across projects
• Take ownership of subcontractor procurement, negotiation, payments, and performance management
• Manage and review monthly valuations, cost value reconciliations (CVR), and commercial reporting
• Proactively manage risk and opportunity registers, providing strategic mitigation and value engineering solutions
• Provide commercial leadership and mentorship to junior team members where appropriate
• Build and maintain strong, long‑term relationships with clients and key stakeholders

About You

• A minimum of 7–10 years’ experience in quantity surveying, ideally within a main contractor environment
• Proven experience operating at Senior Quantity Surveyor level, with the ability to manage projects independently
• A strong background in the prime residential sector; structural experience is highly desirable
• In-depth knowledge and practical application of JCT contract forms
• Excellent commercial acumen, with strong negotiation and analytical skills
• The confidence to lead, influence, and challenge at all levels
• A degree or equivalent in Quantity Surveying or a related discipline

We are unable to offer visa sponsorship for this position. As such we will only consider applications from those who already possess the right to work in the UK.