Planning a home extension or refurbishment can feel overwhelming, especially when trying to understand planning permission, realistic costs and the building process itself.

At Forsyth Construction Surrey Ltd, we believe informed clients make better decisions and ultimately achieve better project outcomes.

You can also explore our main building services and areas we cover via our main home page.

We regularly work with homeowners across Farnham, Guildford, Alton, and surrounding areas, helping them understand what is realistically achievable within their property, budget and planning constraints.

This advice section brings together guidance on planning, costs, timelines and real project insight based on our experience delivering high quality residential building projects across Surrey and Hampshire.

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Planning & Permission Advice

Planning Permission and Extension Regulations

Understanding planning rules early can save significant time and cost during a project. These guides explain when planning permission may be required, what permitted development allows and common mistakes homeowners make during early project stages.

Do You Need Planning Permission for Extensions in Farnham?

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Cost & Budget Advice

Extension Costs and Budget Planning

Extension and refurbishment costs vary depending on structural complexity, specification level and site conditions. These guides explain how extension budgets are typically structured and what influences final build costs.

Builders in Guildford | Home Extensions & Renovations | Forsyth Construction Surrey Ltd

Why More Farnham Homeowners Are Choosing to Extend Instead of Move in 2026

House Extensions in Guildford: A Homeowner’s Complete Guide to Planning, Design & Build

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​Real Project Insight

Real Building Projects and Construction Insight

Seeing real projects helps homeowners understand what happens during construction, how structural work is carried out safely and how projects progress from early build stages through to completion.

Structural Alterations & Refurbishment Project in Farnham | Forsyth Construction Surrey

Forsyth Construction Surrey Ltd | Builder | FMB, Federation of Master Builders

Planning an extension or refurbishment project in Surrey?

We provide clear advice, transparent pricing and high quality workmanship across every stage of the build process.

If you are considering improving your home and would like realistic guidance on feasibility, costs and timescales, our team is always happy to discuss projects at an early stage.

👉 Contact Forsyth Construction Surrey Ltd to discuss your project.

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