Senior Quantity Surveyor

Size Group; Henley-on-Thames; On-site; GBP 65,000 - 95,000; Full time

Benefits offered by this job

Competitive salary

Company pension

Private medical insurance

Critical illness insurance

26 days annual leave

Travel expenses for site-based staff

Job summary

Size Group is seeking a Senior Quantity Surveyor to lead the commercial management of high-end residential projects. You will oversee costs, procurement strategies, contracts, and change control, reporting to the Commercial Manager and collaborating with clients, subcontractors, and internal teams.

The role requires 7–10 years of quantity surveying experience, with a strong background in the prime residential sector and JCT contracts.

Qualifications

• Minimum 7–10 years of quantity surveying experience, ideally with a main contractor
• Senior level experience with the ability to manage projects independently
• Strong background in prime residential sector; structural experience desirable
• Excellent commercial acumen and analytical skills; proven negotiation ability

Responsibilities

• Lead on cost forecasting, budgeting, and detailed financial reporting across projects
• Oversee subcontractor procurement, negotiation, payments, and performance management
• Manage and review valuations, CVR, and commercial reporting for multiple projects
• Provide commercial leadership and mentorship to junior members of the team
• Build and maintain strong relationships with clients and key stakeholders

Skills

Leadership

Cost planning

Procurement

Negotiation

Education

Quantity Surveying degree

Tools

JCT contracts

Job description

About Size Group

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.

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
• Critical illness 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 standardsIntegrity – Integrity earns trust; trust builds relationships
• Entrepreneurial – Self‑stars 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

To be considered for this Senior Quantity Surveyor role, you will have:

• 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