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Got more questions about new Build Project Management? Describe the bit you're unsure about — the AI explains options, sequencing and what to ask the builder.
From plot to keys — programme, procurement, payments and snagging on a self-build or developer site.
You've read the brief on new Build Project Management. Now lean on us to find the right builder — and stay in control of the job.
Got more questions about new Build Project Management? Describe the bit you're unsure about — the AI explains options, sequencing and what to ask the builder.
Costs, timelines, pitfalls and the right questions to ask before any builder starts on new Build Project Management.
Itemised quotes from up to 3 local builders on new Build Project Management — so you can compare like-for-like, not lump sums.
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Four moves that separate a smooth job from a nightmare.
Small changes during the build that lead to massive budget overruns. A PM keeps the project focused on the original brief.
Forgetting to order items like glazing or specialist timber months in advance, which can bring the entire site to a standstill.
Accepting substandard finishes that become difficult and expensive to fix once the contractor has been paid and left the site.
Vague instructions leading to trades doing work that needs to be ripped out and redone.
Indicative UK ranges and a typical week-by-week schedule.
By job type
Quote spread is typically ± 18% — always get 3 quotes.
25 m² single-storey extension · week by week
Schedule slips on dependencies — pad each phase by 10–20% for real-world delays.
Builder quick-view

Builder explained
A dedicated project manager acts as your eyes and ears on-site, ensuring that architects, contractors, and specialist trades work in harmony. This guide explores how professional management protects your investment and ensures your new home meets the highest British construction standards.
| Service Type | Low £ | High £ | Notes |
|---|---|---|---|
| Initial Feasibility / Setup | £750 | £2,500 | One-off fee for planning and initial tender. |
| Full Management (Percentage) | 8% | 15% | Calculated as a percentage of the total build cost. |
| Fixed Monthly Fee | £1,500 | £4,000 | Common for long-term residential builds. |
| Ad-hoc Site Visits | £350 | £650 | Daily rate for specific milestone inspections. |
Costs are heavily influenced by the project's location, with London and the South East commanding a premium. A complex "Grand Design" style build with bespoke materials will require more intensive management than a standard masonry house, increasing the fee accordingly.
While "project managing" your own build can save 10-15% in fees, it is effectively a full-time job that requires deep technical knowledge. Mistakes made by an inexperienced DIY manager—such as ordering the wrong materials or mis-scheduling trades—often cost significantly more than the professional fee they were trying to save.
Professional project managers often pay for themselves by negotiating better trade discounts and preventing costly remedial works.
In the UK, you must also consider the CDM 2015 (Construction Design and Management) regulations. If you manage the project yourself, you take on significant legal responsibilities for site safety that a professional would otherwise handle.
A main contractor manages their own team, but a Project Manager represents your interests. They ensure the contractor isn't cutting corners and that you are only paying for work that has been completed to the correct standard.
Yes. New builds in the UK are generally zero-rated for VAT. A project manager can ensure invoices are correctly formatted and help compile the documentation needed for the VAT 431NB refund claim.
Snagging is the process of identifying defects or unfinished work. It usually happens just before handover, but a good PM will "de-snag" throughout the build to prevent a massive list of issues at the end.
For a standard new build, 1–2 visits per week are typical, though they should be present for key milestones like pouring foundations, roof installation, and first-fix inspections.
A professional PM will have a contingency fund (usually 10-15%) built into the initial plan. They will provide regular "cost-to-complete" reports so you are never surprised by the final bill.
This guide was written with AI assistance and is intended for general information only. Prices are estimates based on UK averages and may vary by region. Always get at least three quotes and consult a qualified professional before starting any work.
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