Surveying, building inspections and design advice grounded in real construction experience.
Helping homeowners, buyers, landlords and developers understand buildings, investigate defects, record sites accurately and turn ideas into practical, buildable projects.
One practice for surveying, building defects and practical design.
Good advice starts with understanding how a building actually works — and how a proposed solution will be built in practice.
Williams Survey & Design combines professional surveying and technical design with extensive hands-on construction experience. That means we consider not only what appears on a drawing or report, but how buildings are assembled, altered, repaired and maintained.
Whether you are planning an extension, buying a property, recording an existing building or investigating a defect, the aim is the same: clear information, proportionate advice and practical next steps.
Choose the service that matches your project
New-Build Snagging & Pre-Completion Inspections
Independent inspections for homebuyers before or after completion, including NHQB Pre-Completion Inspections and broader room-by-room snagging surveys.
Explore new-build inspections →Building Surveys
Independent property condition surveys for buyers, owners and landlords, with clear findings, photographs and practical advice.
Explore building surveys →Defect Investigations
Focused investigation of cracking, dampness, movement, water ingress, brickwork, workmanship and other defined building defects.
Explore defect surveys →Measured & Topographical Surveys
Accurate existing building and site information prepared for design, planning, development, construction and record purposes.
Explore measured & topo surveys →Planning & Technical Design
Measured survey, extension design, planning drawings and Building Regulations information developed with buildability in mind.
Explore planning & design →Get a useful fee indication before you make an enquiry
Straightforward work has published starting prices, while larger or more complex properties and sites are quoted according to the actual scope required.
Whole-property condition and purchaser survey options.
One defined defect or closely related group of issues.
Measured building surveys; topo surveys start from £650.
Feasibility advice; full planning packages start from £1,150.
From first ideas to a design that can actually be built
Extensions work best when planning, structure, construction and budget are considered together from the outset.
- Measured survey of the existing property
- Practical design development
- Planning / Permitted Development advice
- Planning application drawings
- Building Regulations drawings where required
- Coordination with structural information
How much does a house extension cost?
Floor area matters — but structural openings, glazing, kitchens, roof design and site conditions can change the budget considerably.
Our 2026 guide explains realistic early-stage cost ranges, what often sits outside the basic £/m² figure and why discussing budget early can help produce a better, more buildable design.
Read the Extension Cost & Budget Guide →Illustrative early-stage construction allowances before VAT. See the full guide for important exclusions and assumptions.
Professional advice backed by more than 30 years in construction
Williams Survey & Design is led by Luke Haworth ACABE, an Associate Member of the Chartered Association of Building Engineers (CABE).
Professional built-environment qualifications are combined with more than 30 years of practical construction experience, technical drawing, surveying and defect investigation. Williams Survey & Design also holds appropriate Professional Indemnity and Public Liability insurance for the professional services undertaken.
We aim to identify foreseeable problems early, explain the options clearly and provide information that is useful in the real world — not simply technically correct on paper.
More about Williams Survey & Design →Start with the guide-price calculator
Select the service, enter the basic property or project details and get an initial professional-fee estimate. If you continue to an enquiry, those details can be carried through so you do not have to enter them again.
A clear route from enquiry to next steps
Understand
We discuss the property, your concerns or objectives and the information you already have.
Survey
Where required, we inspect and measure the building or site using professional surveying equipment.
Assess & Design
We analyse the information and prepare the appropriate drawings, findings or technical advice.
Explain
You receive clear information, practical recommendations and an understanding of what happens next.
Based in Lancashire, working across the wider North West
We undertake selected survey, inspection and design work across Lancashire, the Ribble Valley, Preston and Chorley areas, the Fylde Coast, Greater Manchester and Cheshire, with projects further afield where the scope warrants it.
Ready to get a fee for your property or project?
Use the calculator for an initial indication, then request confirmation of the fixed quotation and arrange the inspection or site visit.