Construction Cost Estimating & Quantity Surveyor Services
Confident cost control for better residential projects
Planning a house extension, refurbishment, or new build? PreBuild Cost provides clear, independent Construction Cost Estimating and practical Quantity Surveyor Services for homeowners, architects, builders, and small contractors. We turn design intentions into realistic budgets so projects can start on time, on brief and on budget.
Construction Cost Estimating for residential projects
Accurate construction cost estimating is the first step to a successful build. We produce stage-appropriate cost plans and estimates from feasibility and RIBA Stage 0–2 right through to pre-tender and final tender checks. Our estimating service gives you:
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Detailed trade-by-trade cost breakdown
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Overheads and preliminaries included for realistic totals
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Commentary explaining allowances and specification assumptions
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Professional PDF report suitable for use with architects or builders
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1-hour Teams consultation to review your report and discuss next steps
Quantity Surveyor Services for peace of mind
Our Quantity Surveyor Services cover the full commercial lifecycle of a residential project. We provide you with accurate costs in a comprehensive proposal that includes materials, labour, overheads, and crucial preliminaries
Who we help
We work with:
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Homeowners and Self Builders seeking independent cost certainty before committing to a build
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Architects who need reliable cost feedback to inform design decisions
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Builders and small contractors requiring detailed quantities and tender-ready documents
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Project managers and small developers who want robust cost control
Our process — practical, collaborative, independent
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. Once we’ve received your files, we’ll send you a short Fact Finder form to capture project details such as:​
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Desired specification level (standard / mid / high)
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Heating, electrical, kitchen and bathroom expectations
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Site constraints, planning restrictions, or access challenges
This ensures our pricing reflects your actual intentions rather than general assumptions.
We will then confirm the fixed price for our cost proposal and charge payment before commencing the detailed quantity surveying work.
3. We Prepare Your Cost 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.
5. Use Your Report with Confidence. Your PreBuild Cost proposal is designed to be a decision-making tool, helping you move forward with clarity and control.
You can use your report to:​
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Validate your budget before committing to final designs
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Share with architects or engineers to refine drawings
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Approach builders for quotations with confidence
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Present verified cost data to banks or lenders
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Identify potential savings before the project starts
Confidence before construction - that’s what PreBuild Cost is all about.
Why choose PreBuild Cost
Independent and transparent: Clear reporting, auditable assumptions and no hidden fees.
Practical cost planning: We balance design intent with buildability and market realities.
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Experienced with residential work: Focused on extensions, refurbishments, and new homes.
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Actionable outcomes: Our estimates and QS reports are written for non‑technical clients and project teams alike.
Trusted results and clear communication
Clients tell us that the biggest value is avoiding budget uncertainty and costly surprises during construction. We deliver concise, user-friendly reports and are happy to present findings to homeowners, design teams, or contractors to ensure everyone is aligned.
Ready to get a reliable build budget?
Upload your drawings and supporting documents to receive your personalised quote today. We’ll review your information first and confirm the exact fee before proceeding.