New Build & Site
Plumbing & Heating
Projects in Oxfordshire.
First and second fix plumbing, heating and gas for developers, builders and self-builders, designed from architect drawings, priced against your programme, and delivered by a Gas Safe and MCS certified team that hits your dates.
New Build & Site, explained properly.
Full plumbing, heating and gas package for new construction and extensions, from underground drainage co-ordination, hot and cold water design, heating system design and installation, gas supply, sanitaryware second fix, commissioning and handover paperwork.
Developers, main contractors, custom builders and self-builders working on new-build homes, extensions, loft conversions, garden rooms and multi-plot developments across Oxfordshire.
Ideally at architect / MEP design stage. Bringing plumbing and heating design into the drawings early avoids the expensive changes that appear when first fix hits site and reality disagrees with the drawing.
New build plumbing has to hit programme dates, sign off to Building Regs Part G, Part L and Part P (where cross-discipline), and hand over a documented system to the buyer. Missed dates and non-compliant work destroy developer margin.
The cost of ignoring it.
On new build, cheap plumbing sub-contractors are the fastest way to blow programme and margin.
Missed programme dates
First fix slipping delays plasterers, screeders and second fix downstream. Programme drift compounds.
Non-compliant systems
Building Control sign-off requires Part G/Part L compliant hot water, unvented cylinder G3 qualification, and correct energy performance. Cutting corners fails inspection.
Poor coordination with electricians
Underfloor heating manifolds, boiler wiring, unvented cylinder controls and immersion supplies all need to be sequenced with the electrician. Uncoordinated = revisits.
Post-handover defects
Buyer moves in, radiators aren't balanced, cylinder recovery is slow, controls aren't paired, post-handover defects damage brand reputation for the developer.
Common mistakes we see
- •Under-scoping the plumbing package to win the tender, then variation-order-ing the developer to death
- •Not coordinating first fix with the screeder's programme
- •Skipping proper heat loss calc on a new build, mandatory under Part L
- •Fitting an unvented cylinder without G3 qualified engineer
- •Missing commissioning paperwork at handover
How we run the job.
- 01
Design & take-off
We work from architect drawings, produce a plumbing and heating design, and take off materials for a fixed-price tender.
- 02
Programme sign-up
First fix, screed, second fix and commissioning dates agreed with the main contractor programme.
- 03
First fix
Underground drainage coordination, hot & cold water pipework, heating pipework, UFH loops, boiler/heat pump position, gas supply.
- 04
Second fix
Sanitaryware, radiators, taps, showers, boiler/cylinder install, controls, connection and pressure test.
- 05
Commission & handover
System commissioning, benchmark logbooks, heat pump MCS handover pack, buyer walk-through, defect list closure.
What you actually get.
Programme discipline
We work to the main contractor's dates and take the ownership that comes with it.
Design-led package
Not just fitting, designing the system so it works, complies and hands over cleanly.
Compliance-ready
Part G, Part L, Gas Safe, G3 unvented, MCS heat pump handover, all covered.
MCS for heat pumps
New builds increasingly specify heat pumps under Part L. MCS certification is required.
Multi-plot capable
We can resource multi-plot developments across Oxfordshire, same programme discipline scaled.
Documented handover
Every property handed over with commissioning records, warranties registered, controls demonstrated.
Real new build & site jobs, real Oxfordshire homes.
Depth, not filler.
What our new build and site package covers in practice.
Water services
MDPE mains, internal manifolded hot & cold in high-density plots, expansion vessels, PRVs, WRAS-compliant materials.
Unvented cylinders (G3)
Full G3 install and certification, the qualification unvented cylinders legally require.
Heating design
Room-by-room heat loss to Part L, emitter selection, controls, weather compensation on high-spec plots.
Underfloor heating
Full UFH design and install for screed and low-profile retrofit, coordinated with electrician for actuators and thermostats.
Gas installation
Gas Safe pipework from meter to appliance, correct sizing for peak demand, tightness and pressure certification.
Heat pumps (MCS)
For Part L / Future Homes Standard compliant plots, MCS certified air source heat pump installs with grant paperwork where applicable.
Sanitaryware second fix
Developer-spec suites or bespoke customer choices installed to a clean handover standard.
Commissioning & handover
Balance, benchmark, MCS handover pack for heat pumps, buyer walkthrough. Snag list closed to sign-off.
Straight answers.
Do you work for main contractors and developers?
Yes, main contractor sub-package work, developer direct engagement, and self-build direct engagement, all covered.
Can you price from architect drawings?
Yes. Give us the drawings and specification and we'll produce a fixed-price tender against the package scope.
Do you work to Part L / Part G / Building Regs?
Yes, every element of the package is designed to comply and hand over with the paperwork Building Control requires.
Are you MCS certified for heat pumps on new builds?
Yes, increasingly relevant as Part L and the Future Homes Standard push toward electric heating.
Can you resource multi-plot developments?
Yes, we scale our team across multi-plot programmes with the same programme discipline.
Do you handle underground drainage?
We coordinate with the groundworker on drainage sequencing but the underground work itself is typically the groundworker's package.
Do you handle G3 unvented cylinder installs?
Yes, G3 qualified engineers install and certify unvented cylinders in accordance with regulation.
Where do you cover?
Full Oxfordshire, Cotswolds and surrounding, from Witney and Oxford out to Moreton-in-Marsh.
Related services
All servicesSystem upgrades, radiator installs, cylinder swaps, chemical cleans and wet underfloor heating designed and installed to work as one system, not a boiler stuck on top of tired pipework.
Learn moreAir source and ground source heat pumps designed and installed by an MCS certified team, the certification that unlocks government grants and long-term manufacturer warranties.
Learn moreOne team managing plumbing, tiling, electrics, plastering and project management under a single fixed price.
Learn moreGet a fixed-price quote for new build & site in Witney, Oxford.
Free, no-obligation quote in writing. Gas Safe, MCS certified where relevant, fully insured to £5m. Local team, real engineers, no call centres.