Find the right builder

Builders are the cornerstone of UK home improvement, specialising in the structural development, alteration, and maintenance of residential properties. From minor internal reconfigurations to complex multi-storey extensions and new builds, a professional builder provides the technical expertise and project management required to transform a house into a home.

Hiring a builder is often the first step in a major renovation. They coordinate various specialist trades, manage site safety, and ensure that every brick laid or steel beam installed meets the rigorous standards required for modern UK living.

What to Expect When Hiring a Builder

A professional builder offers a comprehensive range of construction services. While some focus on specific niches like loft conversions, most general builders handle a broad spectrum of work including:

• Structural Alterations: Removing load-bearing walls and installing RSJs (steel beams) to create open-plan spaces.
• Extensions & Conversions: Adding floor space through single or double-storey extensions, garage conversions, or annexes.
• Groundworks: Excavating foundations, installing drainage systems, and preparing sub-bases.
• Brickwork & Masonry: Expertly laying bricks, blocks, or stone to match existing property aesthetics.
• Full Renovations: Stripping properties back to the shell and rebuilding internal layouts.

The process typically begins with a site visit and a review of your architectural drawings. Once a quote is agreed upon, the builder will establish a timeline, manage the delivery of materials, and liaise with Building Control officers throughout the various inspection stages.

Why Hire a Professional?

Structural work is high-stakes; errors can lead to property damage, safety risks, and legal complications. A professional builder ensures your project complies with UK Building Regulations, covering everything from structural integrity (Part A) to fire safety (Part B) and energy efficiency (Part L).

Beyond technical skill, professionals carry essential insurance, such as Public Liability and Employer’s Liability. They also understand the CDM 2015 regulations regarding site safety. Attempting large-scale structural work as DIY can invalidate your home insurance and make the property difficult to sell without the necessary completion certificates.

Typical Costs

Construction costs vary significantly based on your location in the UK, the complexity of the site, and the quality of finishes. Below are estimated costs for 2025/26, inclusive of VAT and standard labour rates.

Service	Low £	High £	Notes
Single Storey Extension	£1,800	£2,600	Per square metre (m2).
Double Storey Extension	£1,500	£2,200	Per m2 (cheaper per m2 than single).
Internal Wall Removal	£1,200	£4,000	Includes RSJ and plastering.
Garage Conversion	£12,000	£25,000	Standard single garage.
New Build (Mid-range)	£2,100	£3,200	Per m2, excluding land costs.

Price fluctuations are often driven by ground conditions (e.g., needing deeper foundations), site access restrictions, and the fluctuating cost of raw materials like timber and steel.

How to Choose the Right Builder

Finding a reliable builder requires due diligence to ensure your investment is protected. Look for the following markers of quality:

• Accreditations: Check for membership in the Federation of Master Builders (FMB), TrustMark, or the Guild of Master Craftsmen.
• References: Ask to see recently completed projects and, if possible, speak to previous clients about their experience with timelines and communication.
• Insurance: Verify they have valid Public Liability insurance (minimum £2 million, though £5 million is preferred for larger jobs).
• Written Contracts: Never rely on a handshake. Use a standard contract (like those from the FMB or JCT) that outlines payment milestones and the scope of work.

Questions to ask: How do you handle "extras" or changes to the plan? Who will be the daily point of contact on-site? Can you provide a detailed schedule of works?

Frequently Asked Questions

Do I need planning permission for all building work?

Not necessarily. Many smaller extensions and conversions fall under "Permitted Development" rights. However, all structural work must comply with Building Regulations, which is a separate process from planning permission.

Should I pay a deposit upfront?

A small deposit to secure a start date is common, but you should never pay for the entire job upfront. Establish a payment schedule based on completed milestones (e.g., foundations, wall plate, watertight stage).

What is the difference between a builder and a main contractor?

A builder often performs the physical work with a small team. A main contractor manages the entire project, hiring various subcontractors (plumbers, electricians, etc.) and taking full responsibility for the timeline and budget.