How to Win Work on New Build Sites UK — Getting onto Developer and Builder Preferred Lists (2026)

New build site work is one of the most reliable revenue streams a trade contractor can build. Multiple plots, a predictable programme, and a client who pays on application rather than chasing a homeowner who 'forgot' the invoice. But getting onto a developer's preferred list is not as simple as sending an email. This guide walks through how the new build market is structured, how to get yourself in front of the right people, and how to manage the work once you win it.

Why new build site work is worth pursuing

The appeal is straightforward: volume. On a 60-plot development you are not quoting one bathroom — you are quoting 60. Once your team knows the house type, output per plot becomes predictable and your margins become easier to protect. The workflow is repeated, which reduces waste, speeds up each subsequent plot, and lets your gang hit a rhythm that domestic one-off work simply cannot match.

Payment on application (AfP) is a significant structural advantage over domestic work. Instead of chasing individual homeowners, you submit a monthly application tied to measured progress and the main contractor pays — slowly, perhaps, but to a structured cycle. Cash flow is predictable even if the terms are long.

There is also a growth angle. Consistent new build work justifies taking on a second gang, a van, an apprentice. The pipeline visibility a live development gives you — six months of plots ahead — is something no domestic referral network reliably provides. And contrary to what some trades assume, price sensitivity is lower than the domestic market if you are delivering on programme. A developer who trusts you to turn plots around on time will pay a fair rate rather than risk delays to their sales completions.

Understanding the different types of new build client

Not all new build work is the same. Knowing who you are approaching shapes how you pitch, what compliance you need, and what terms to expect.

• National housebuilders — Barratt, Taylor Wimpey, Bellway, Persimmon and their peers operate at scale. They have centralised procurement teams, approved contractor databases, formal compliance requirements (CHAS, Constructionline or equivalent), and payment terms that can stretch to 60 days. The volume is there but so is the bureaucracy. Expect a formal tender process and a lengthy onboarding procedure before you see a single plot.
• Regional developers — Mid-size regional builders completing 20–200 units per year are often more accessible. Procurement decisions are made locally, sometimes by the contracts manager or even the MD. They still expect professionalism and evidence of comparable project experience, but the process is less rigid. This is often the best entry point for a trade contractor moving into new build for the first time.
• Self-build contractors and bespoke developers — Lower volume but higher margin per unit. Often one-off or small phases. Good for building references and learning the new build workflow without committing to a major programme.
• Housing associations — Social housing procurement operates under specific HA rules, often involves longer tender timelines, and may require additional accreditations. Payment terms are typically reliable once you are in the system, but the pathway in is its own project.

Getting onto a preferred contractor list

Most housebuilders and larger developers maintain an approved contractor list (ACL) or preferred supplier list. Getting onto it is the gating step — without it, you will not receive tender invitations or direct approaches for work.

The application process varies but generally requires:

• Company registration details, VAT number, and trading history
• Public liability insurance (minimum £2m, often £5m for larger sites) and employers' liability — certificates must be current
• Trade memberships relevant to your discipline (Gas Safe, NICEIC, NAPIT, CIPHE, FMB, etc.)
• Health & safety accreditation — CHAS, Constructionline, SafeContractor, or SMAS are the most commonly required; some developers accept one, others specify which
• References from comparable projects — ideally at least two new build sites of similar scale
• Method statements and risk assessments for your trade activities

For national housebuilders, check their supplier portal directly. Barratt, Taylor Wimpey, and Persimmon all run online registration systems. For regional developers, a direct approach to the contracts manager or commercial director is often more effective — a phone call followed by a properly presented company profile will get you further than an unsolicited email.

If you do not yet have CHAS or Constructionline, prioritise getting them. They are effectively a licence to operate in the sector and the annual cost is a fraction of what a single new build phase is worth.

Pricing for new build volume

New build pricing is almost always quoted per plot or per house type, sometimes as a total package for a phase. Labour-only rates are common on large sites where the main contractor supplies materials. Understanding the structure before you price is critical.

The fundamental discipline is knowing your floor. Volume should generate lower margin per unit but higher absolute profit — that is the deal. Where contractors get hurt is when they price the first plot to win the contract, then discover that margin erodes across 40 more plots without the ability to renegotiate.

Build your per-plot rate from first principles: labour hours per plot (timed from a comparable job or a realistic estimate), materials if supply is your responsibility, van and tool costs amortised across the phase, and your overhead contribution. Then apply your programme risk buffer. If the developer runs late and your gang is on standby between plots, that is dead time you will not be paid for unless you have priced for it or negotiated a standing time clause.

On larger phases, consider pricing different house types separately. A four-bed detached is not the same as a two-bed semi — and quoting a blended rate without knowing the mix can leave you exposed if the phase runs heavy on the larger plots.

NHBC, building regulations and inspection stages

All new build work must comply with Building Regulations, and on NHBC-registered developments the Buildmark warranty adds a further layer of quality assurance. Your work will be inspected at defined stages — what those stages are depends on your trade, but for most building services trades this means first-fix inspection before boarding or plastering, and final inspection before occupation.

Missing an inspection stage — or having work that fails inspection — delays the plot sign-off, delays the completion, and puts you firmly in the site manager's bad books. Know your inspection trigger points before you start on site. Build a simple checklist for each plot so nothing gets plastered over before it has been signed off.

The NHBC technical standards are publicly available and set out what is expected at each stage. If you are new to new build work, read the relevant chapter for your trade before you price. Surprises at inspection are far more expensive than preparation beforehand.

Managing multi-plot workflow

New build site work suits two-person gangs working through repeated tasks efficiently. A sole trader can absolutely do new build work, but the economics improve significantly when you have one person doing the skilled work while the other prepares the next plot, chases materials, or handles first-fix while the other is on second-fix two doors down.

Estimate your labour output per plot accurately — then hold yourself to it. If the programme says you complete two plots per week per gang, you need to know within the first fortnight whether that rate is achievable. If it is not, communicate early to the site manager. Surprises at the end of a phase are worse than honest conversations at the start.

Track your progress plot by plot. Know which plots are at first-fix, which are at second-fix, which are snagged and awaiting sign-off. On a 40-plot development that information cannot live in your head. A simple programme tracker — even a spreadsheet — keeps you and the site manager aligned and protects you in any dispute about delays.

Cash flow on new build sites

The payment mechanics of new build work are different from domestic — and the difference matters for your working capital.

Applications for payment (AfPs) are submitted monthly, usually on a fixed date tied to the main contractor's own payment cycle. You submit a valuation of work done, they assess it and issue a payment certificate, and payment follows within the contractual period — typically 30–45 days from the assessment date, sometimes longer. From submission to money in your account, you could be looking at 60 days or more.

Retention compounds this. Most new build subcontracts include 5% retention, half of which is released at practical completion and the other half at the end of the defects period — typically 12 months later. On a £150,000 phase, that is £7,500 sitting in retention for over a year. Factor that into your working capital planning from day one.

Submit your applications on time, every time. A late application goes to the back of the queue. Some developers will not accept a late application at all — you wait for the next monthly cycle, which means another 30 days before you even start the clock.

Building the relationship with the site manager

On most new build developments, the site manager is the person who decides which subcontractors get the next phase. Procurement teams set the approved list; the site manager determines who they actually want back.

The things that matter to a site manager are not complicated: turn up when you say you will, keep your section of the site tidy, flag problems before they become delays, attend the weekly site meeting when invited, and be easy to reach. That sounds basic because it is — but you would be surprised how few subcontractors consistently deliver on all of it.

When something goes wrong (and on a live construction site, something always does), the way you handle it is what the site manager remembers. A subcontractor who calls to say 'we have an issue and here is what we are doing about it' is far more valuable than one who goes quiet and hopes it resolves itself.

Reliability and communication beat price in the long run. A developer who knows you will not let them down on programme will pay your rate rather than roll the dice on someone cheaper.

Common mistakes when moving into new build work

• Underpricing to win the first contract. The temptation to price the first plot keenly to get on site is understandable, but if that rate locks in for the whole phase you will find the margin erodes well before you reach the final plots. Be realistic from the start — a developer who wants you will negotiate, not simply reject a fair price.
• Taking on more than your team can handle. New build work can scale quickly. A developer who likes you will offer more phases, more plots, sometimes another site nearby. Taking on too much and then underdelivering damages the relationship faster than anything else. Grow incrementally.
• Missing inspection stages. If work gets covered before it is signed off, you may be asked to open it up. That is a cost and a delay you own entirely. Build inspection checkpoints into your plot tracking from the first day on site.
• Neglecting the site manager relationship. Focusing entirely on getting the work done and not investing five minutes in the daily site manager conversation is a common mistake. The quality of that relationship determines whether you get invited back.
• Failing to track applications and retention. Missing an application date, losing track of which retention amounts are due and when, or failing to chase unpaid certificates costs real money. At scale, this is not an admin problem — it is a cash flow problem.