House Extension Cost Estimating
Get detailed pricing for single-storey, double-storey and kitchen extensions from experts.
Our Services
We value your project ideas, expertise, and vision.
Speak with one of our construction estimating advisers over the phone, or submit your project details and we’ll get back to you shortly.
Overview
Professional House Extension Cost Estimating Service
We provide accurate and detailed house extension cost estimating services in the UK, helping homeowners, architects, and builders plan extension projects with confidence.
Whether you are planning a single-storey extension, double-storey extension, or kitchen extension, our estimates give you a clear and realistic breakdown of construction costs before work begins.
Our goal is simple:
👉 Help you understand your true extension costs and avoid budget surprises.
As part of our wider UK construction estimating services, we also support clients across a full range of project types. If you are planning a larger refurbishment or multi-phase development, you may also find our Construction Estimating Service useful for full project cost breakdowns, or our Home Renovation Cost service if your extension is part of a wider home improvement project.
For contractors and builders looking to price and win more work, our Builders Estimates service provides detailed, trade-by-trade cost breakdowns designed for tendering and construction bidding.
Key Services
Types of House Extensions We Estimate
We provide cost estimating for all types of residential extensions, including:
Single-storey rear extensions
Side return extensions
Double-storey extensions
Kitchen extensions
Wrap-around extensions
Loft + extension combination projects
Open-plan living extensions
Structural extension alterations
Each estimate is tailored to your drawings and specification.
Build Cost Estimating
Accurate cost estimates for new builds, extensions, refurbishments, and commercial developments.
Quantity Take-Offs
Tender Estimates
Schedule of Works
Our Approach
Improved Accuracy:
We enhance accuracy by minimising the risk of costly errors through professionally prepared cost estimates aligned with SMM7 or other specified industry standards.
Save Valuable Time:
We remove the burden of time-consuming estimating tasks, allowing you to focus your resources on project delivery, client relationships, and effective site management.
Increase Win Rate:
We support you in submitting clearer, more competitive, and professionally structured tenders, helping improve your success rate and secure more profitable contracts.
Flexibility:
Our freelance estimating service is designed to adapt to your workload, providing reliable support exactly when you need it—ideal for managing peak tendering periods and resource fluctuations.
UK Construction Focus:
With deep knowledge of the UK construction market, we understand local material pricing, labour rates, and industry conditions to ensure realistic and dependable estimates.
Clear Cost Breakdowns:
You receive transparent, detailed cost breakdowns that provide full clarity, strengthen pricing confidence, and improve control over project budgets.te estimates and optimize cost plans to ensure your budget remains accurate and aligned with changing requirements.
Who It’s For?
Our professional estimating services are designed to support a wide range of construction and property professionals, as well as private clients, who need accurate and reliable project cost assessments.
Home Builders
Detailed builders estimates to help plan projects, manage budgets, and submit competitive quotations.
Building Contractors
Accurate tender pricing, labour costing, and material take-offs to improve bid success and project profitability.
Residential Architects
Cost estimates aligned with design plans and specifications to support feasibility studies and client budgeting.
Property Developers
Comprehensive build cost forecasting for residential, commercial, and mixed-use developments.
Homeowners
Clear and transparent estimates for new builds, home extensions, loft conversions, and renovation projects.
Project Managers
Reliable cost breakdowns and schedules of works to support planning, procurement, and budget control.
Quantity Surveyors
Professional estimating support for take-offs, pricing verification, and cost planning assistance.
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