Construction cost planning and early-stage advice to help you understand likely project costs before work begins.
Ongoing construction cost management and project support to help keep budgets and decisions under control.
Learn more about our experience supporting homeowners and residential construction projects.
Speak to a construction consultant about your plans, costs or concerns before committing to the next stage.
Our team of 11 brings over 50 years of combined experience in quantity surveying, project management, and construction.
We provide clear, accurate construction cost advice, cost estimates and tender support that protect your budget, reduce risk, and keep your project on track — from the very first sketch through to completion.
Get a quick, high-level overview of your project’s cost. Perfect for early feasibility and budget planning.
See exactly where your money would be going with a full cost breakdown, tailored to your project.
We manage the tender process to vet contractors, handle queries and negotiate best and final quotations.
With 10+ staff, we’re big enough to move quickly — unlike one-person consultancies.
A proven track record helping homeowners plan and manage their projects.
Expertise across surveying, construction, and project management under one roof.
Our values guide every report and recommendation we provide.
We'll prepare a full cost report, showing every detail of your project broken down and costed
01483 339 733
Call us directly, or share your details online and we’ll quickly assess the best way to help with your project
Planning a residential building project can feel overwhelming, especially when it comes to budgets, project planning, and managing construction costs. Below are some of the most common questions homeowners ask before starting an extension, renovation, or residential development project.
Not every project will require the same level of support, but speaking to a construction consultant before work begins can help you understand likely costs, identify potential risks and make better-informed decisions before committing to a contractor or build programme. Early advice can also help reduce unexpected costs later in the project.
A construction consultant can help by reviewing budgets, contractor quotations and project allowances, as well as identifying areas where costs may increase. They can also provide independent advice throughout the build so that changes, extras and unexpected issues are assessed before they have a major impact on the overall budget.
Ideally, as early as possible. Bringing in a cost consultant before the project starts gives you a clearer understanding of likely costs and helps you budget more realistically. They can also provide ongoing support during the build if you need help reviewing changes, contractor costs or financial decisions.
Yes. CNJ can help homeowners review contractor quotations, identify potential gaps or unclear allowances, and assess whether the figures appear realistic for the proposed work. This can give you greater confidence before accepting a quotation or agreeing to additional costs during the build.
If you would like us to review your project costs or discuss your plans, contact CNJ.
A quantity surveyor is typically focused on the financial and contractual side of a construction project, including estimating, valuations and cost control. A construction consultant may provide broader project advice, combining cost guidance with practical support, risk management and help throughout different stages of the build. CNJ’s service is designed to give homeowners access to this wider support.
The best starting point is to establish a realistic budget before work begins, understand what is included in contractor quotations and allow for contingency costs. It is also important to control design changes and agree any additional costs before work is carried out. Independent construction cost advice can help you make informed decisions and reduce the risk of unexpected overspend.