What Will Your Project Really Cost?
Get Clear, Accurate Pricing Before You Commit to Your Build.
PreBuild Cost brings independent, expert Quantity Surveying directly to homeowners and architects. We combine decades of real-world build experience with technical cost analysis to give you a definitive, honest price for your residential project before construction starts.
Don’t waste time and money chasing a dream that’s outside your budget.
Get the cost certainty you need today.
The Problem Solved
Stop Cost Surprises. Start Smart.
Building a major residential project (like an extension or new build) shouldn't be a financial guessing game. Traditional quotes are often vague or wildly different. Our mission is to prevent costly surprises and ensure your dream design remains financially achievable.
We provide a comprehensive cost proposal that includes materials, labour, overheads, and crucial preliminaries - giving you a true reflection of the delivery cost in today's market.
Who We Serve
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Homeowners: Validate affordability and approach builders with confidence.
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Architects & Designers: Guide your clients with credible, data-backed budget figures.
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Developers & Consultants: Get early cost assessments for feasibility studies and finance applications.
Our Core Services
We provide reliable cost analysis for all major residential projects across the UK.
Our Core Services
We provide reliable cost analysis for all major residential projects across the UK.
Accurate costing for single-storey, double-storey, and complex extensions.
● Home Extensions
Precise costings, including specialist focus on Velux and dormer conversions.
● Loft Conversions
Full financial feasibility reports for single dwellings or small developments.
● New Builds
Detailed analysis for major internal remodels and whole-house refurbishment projects.
● Renovations
How It Works: Clarity in 4 Simple Steps
1. Upload Your Drawings
Securely send us your existing and proposed plans (floor plans, elevations, sections) and any supporting information like site photos or structural drawings.
2. Confirm Scope and Payment
3. We Prepare Your Proposal
Our team - combining 15+ years of on-site build experience with 20–30 years of Quantity Surveying expertise - analyses your files using live UK market rates. We remain completely independent to ensure our figures are neutral and accurate.
4. Receive & Review Your Report
You will receive a detailed PDF report, followed by a 1-hour Teams review with one of our estimators. We will walk you through every line, clarify assumptions, and highlight opportunities to save or reallocate your budget.
Typical Turnaround: Most reports are completed within two weeks of receiving all required information.
Why Choose PreBuild Cost?
Experience-Led. Independent. Transparent.
Once we receive your files, we will review the scope of work and send you a short Fact Finder form to capture key details (e.g., desired specification level, expectations for heating/kitchens). We will then confirm the fixed price for our cost proposal and charge payment before commencing the detailed quantity surveying work.
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Real-World Expertise: We aren't just desk-based surveyors. Our team has decades of hands-on build management experience, ensuring our prices are realistic and achievable.
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Completely Independent: We are not affiliated with any builder, architect, or supplier. Our only loyalty is to cost accuracy.
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Full Clarity: Our reports always include the true cost of delivery, accounting for overheads and preliminaries (site setup, welfare, management), ensuring no hidden costs later.
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1-Hour Review Included: Every report comes with a dedicated consultation to ensure you understand every detail and can move forward with confidence.
