£1 Million Residential Tender Breakdown — How We Priced a UK New Build

Understanding the Scope: What Does a £1 Million Residential New Build Entail?

Before diving into the costs, it’s important to grasp what a £1 million budget covers in today’s UK market. Typically, this budget is suited for a mid-to-high specification detached house, potentially spanning around 300-350 m² (approximately 3,200-3,800 sq ft). The scope generally includes high-end materials and finishes, sustainable building techniques, and possibly some custom architectural features.

For our case study, the project was located in a suburban area of the South East, a region known for its higher-than-average construction costs. The client desired a blend of modern aesthetics with sustainable technology, pushing the envelope on both design and functionality. At £2,800-£3,000/m², a 340 m² house sits right in this budget range for this region.

Breaking Down the Tender: Key Cost Components

A comprehensive tender breakdown is crucial to avoid unforeseen expenses. Here’s how we divided the costs for this project:

Pre-construction Costs: Including planning and design fees, surveys, and legal costs. Typically, these account for about 10-15% of the total budget (£100,000-£150,000).
Construction Costs: The bulk of the budget, around 65-70%, covers materials, labour, and plant hire (£650,000-£700,000).
Finishing Costs: High-spec fixtures, fittings, and landscaping can take up 10-15% (£100,000-£150,000).
Contingency: Always wise to set aside at least 8-10% for unforeseen expenses (£80,000-£100,000).

The Full Cost Plan: Trade-by-Trade Breakdown

Here is how the £1 million budget was actually allocated across the major trade packages for this 340 m² South East new build:

Trade Package	Cost	% of Build Cost
Groundworks and foundations	£75,000	10.7%
Superstructure (frame, walls, roof)	£180,000	25.7%
Roofing (slate, insulation, guttering)	£42,000	6.0%
External windows and doors	£55,000	7.9%
Mechanical and electrical	£95,000	13.6%
Internal fit-out (1st and 2nd fix)	£85,000	12.1%
Kitchen and bathrooms	£70,000	10.0%
Plastering and screeding	£28,000	4.0%
Flooring and decorating	£35,000	5.0%
External works and landscaping	£35,000	5.0%
Total Build Cost	£700,000	100%
Design and professional fees (15%)	£105,000	—
Contingency (8%)	£64,000	—
VAT (on professional fees and fittings)	£21,000	—
Planning, surveys, and legal	£15,000	—
Total Project Cost	£905,000	—

Note: New residential builds are zero-rated for VAT. However, professional fees (architects, QS, engineers) attract VAT at 20%, as do certain fittings and landscaping costs.

Material Costs: Navigating the Market in 2026

In 2026, material prices have seen fluctuations due to inflation and supply chain adjustments. For a high-spec new build, here’s what we encountered:

Brick and Block: Averaging between £800-£1,100 per thousand bricks, plus £12-£18/m² for blockwork inner leaf.
Roofing Materials: Slate tiles are popular, costing around £80-£110 per square metre supply and fix.
Windows and Doors: High-specification triple-glazed units come in at about £600-£900 per unit, depending on size and configuration.
Insulation: High-performance insulation materials cost approximately £25-£35 per square metre for walls and roof.
Structural timber: C24 structural timber is running at approximately £550-£650 per m³ in 2026.

Labour Costs: The Human Element

Labour costs remain a significant portion of the budget, influenced by regional demand and the complexity of the project. Here are some specifics for the South East in 2026:

General Builders: Typically charge between £180-£240 per day.
Specialist Trades: Electricians and plumbers command higher fees, often around £220-£280 per day due to their expertise.
Site Management: Crucial for ensuring timelines and budgets are adhered to, a site manager typically costs £60,000-£80,000 for the duration of a project this size.

Managing Unexpected Costs: Contingency Strategies

Even with meticulous planning, unexpected costs can emerge. For this project, setting aside a contingency fund of 8-10% proved crucial. This fund covered unforeseen groundworks issues and design changes requested by the client.

An example scenario involved discovering unsuitable soil conditions, requiring additional foundation work that added £28,000 to the initial cost. Thanks to the contingency fund, these adjustments were seamlessly integrated into the project timeline and budget.

Frequently Asked Questions About £1 Million New Build Pricing

What does £1 million buy you in terms of house size in 2026?

In the South East, approximately 300-360 m² of high-specification new build (total build cost including prelims, roughly £2,800-£3,000/m²). In the Midlands or North, the same budget could deliver 350-420 m² due to lower labour rates.

Is VAT payable on a new residential build?

New residential construction is zero-rated for VAT, meaning the main contractor charges 0% VAT on the build. However, professional fees (architects, QS, structural engineers) are standard-rated at 20%. Always confirm VAT treatment with your accountant.

What are the biggest risks on a £1 million new build?

Ground conditions, planning delays, subcontractor availability, and scope creep are the top four. All of them can be managed with proper risk contingency and a well-drawn contract.

Should I appoint a QS before or after getting planning permission?

Before, ideally. A QS at pre-planning stage can advise whether the scheme is commercially viable at the target cost. It’s far better to find out at feasibility than after six months of planning and design.

Conclusion: The Value of a Detailed Tender Breakdown

Pricing a £1 million residential new build involves a detailed understanding of various cost components, from materials and labour to finishing touches and contingency planning. The trade-by-trade approach gives you full visibility of where the money goes — and gives subcontractors clear packages to price competitively. At RapidQS, we leverage our builder background and expert knowledge to provide accurate and fast tender breakdowns, ensuring your project stays on budget and on schedule.

2026 UK Construction Market Outlook: What Builders Need to Know

As we navigate through 2026, the UK construction industry continues to face a unique set of challenges and opportunities. For builders, developers, and contractors, staying ahead of market trends is no longer optional — it is a critical component of maintaining profitability and securing future work. The landscape of construction costs, material availability, and labour dynamics has shifted significantly over the past few years, requiring a more agile and informed approach to project pricing and management.

The Continuing Evolution of Material Costs

One of the most pressing issues for the UK construction sector remains the volatility of material prices. While the extreme spikes seen in the early 2020s have largely stabilized, a new baseline has been established. Key materials such as structural steel, timber, and cement-based products are now trading at persistently higher levels. For instance, the cost of manufacturing energy-intensive materials like bricks and cement remains elevated due to sustained high energy prices across Europe. Consequently, builders must move away from relying on outdated price books and instead use real-time market data when estimating projects.

Furthermore, the push towards sustainable building practices has introduced new materials into the mainstream market. While products like low-carbon concrete and sustainable timber alternatives offer long-term environmental benefits, they often come with a short-term cost premium. Navigating these choices requires careful cost-benefit analysis, an area where professional quantity surveying provides immense value.

Labour Shortages and Wage Inflation

The UK construction industry continues to grapple with a structural skills shortage. An aging workforce, combined with changes in migration patterns, has left many regions struggling to find qualified tradespeople. In 2026, this scarcity directly translates into wage inflation. Skilled trades such as bricklayers, electricians, and plumbers command premium day rates, particularly in high-demand areas like London and the South East.

To combat this, forward-thinking builders are investing heavily in apprenticeships and upskilling their existing workforce. However, in the short term, the cost of securing reliable labour must be accurately reflected in every tender. Underestimating labour costs is a guaranteed path to project losses, reinforcing the need for precise, trade-by-trade cost planning before breaking ground.

The Impact of Regulatory Changes on Build Costs

Regulatory compliance is another significant driver of construction costs in 2026. The implementation of stricter environmental standards, such as the Future Homes Standard, requires enhanced insulation, advanced heating systems (like air source heat pumps), and improved airtightness in new residential builds. These requirements add both material costs and complexity to the build process.

Additionally, the Building Safety Act has introduced rigorous new protocols for higher-risk buildings, demanding extensive documentation, enhanced design scrutiny, and stricter site management. For developers, this means allocating more budget to preliminary costs, design fees, and project management. A robust Bill of Quantities (BOQ) is essential to ensure these compliance costs are fully captured and priced accurately.

Technology as a Profitability Enabler

In response to these financial pressures, technology adoption within the UK construction sector is accelerating. Digital estimation tools, Building Information Modeling (BIM), and cloud-based project management software are helping builders optimize their workflows and reduce waste. By integrating digital quantity surveying practices, contractors can extract precise material quantities, track real-time cost variations, and manage subcontractor payments with unprecedented accuracy.

For small to medium-sized builders, partnering with a digitally-enabled QS firm like RapidQS levels the playing field, allowing them to submit highly professional, data-backed tenders that rival those of larger competitors.

Strategic Procurement and Risk Management

Success in the 2026 construction market requires a strategic approach to procurement. Relying on a single supplier or failing to lock in prices for long-lead items exposes projects to unnecessary financial risk. Effective risk management involves identifying potential cost overruns early, building appropriate contingencies into the cost plan, and negotiating contracts that fairly distribute risk between the client and the contractor.

Ultimately, the builders who thrive in 2026 will be those who prioritize financial clarity. By understanding the true cost of construction, actively managing risks, and leveraging professional quantity surveying expertise, UK contractors can protect their margins and deliver successful projects in a complex market.