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new build development

Sectors

Plumbing, Heating & Drainage Services for Property Developers

  • Gas Safe, OFTEC and Worcester Bosch-accredited engineers
  • Experienced with NHBC / warranty handover and snagging support
  • Dedicated site teams for programmed works or single-plot commissions

GasWise delivers accredited plumbing, heating, and drainage services designed for property developers, housebuilders, and M&E contractors. We understand phased programmes, warranty handover (such as National House Building Council), snagging periods, and the tight deadlines of a build schedule.

Our focus remains consistent: safe, compliant installs, thorough commissioning, clear evidencing, and timely aftercare during the defects period.

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Who We Work With

We partner with:
  • Private and volume housebuilders
  • Small to medium-sized developers and regeneration contractors
  • M&E contractors and principal contractors (on a subcontract basis)
  • Housing associations, build-to-rent, and private estate managers
  • Site project managers and property handover teams

What Developers Need & How We Deliver It

Here are some of the most important services we offer for landlords and property managers:
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Commissioning & Pre‑Handover Checks

We provide full mechanical and plumbing commissioning, such as gas tightness, appliance and flue testing, boiler commissioning reports, system balancing, flow/return checks, and pre‑handover performance tests. Every plot receives a commissioning report ready for inclusion in the operations and maintenance pack.
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Certification & Compliance

Where applicable, we issue Gas Safety Records (CP12) for occupied plots and appliances, as well as commissioning certificates, service reports, and any statutory documentation required by warranty providers or local authorities.
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Handover Documentation

We prepare handover packs containing test certificates, service schedules, boiler manuals, asset lists, and recommended maintenance plans - keeping snagging periods clear and verifiable.
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Snagging & Defects-Period Support

Dedicated aftercare and rapid-response teams for the defects period: fast diagnostics, temporary safe repairs, and managed follow-ups to permanently resolve issues, reducing homeowner disruption and any warranty claims.
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Water Hygiene & Legionella Control

Pre‑handover water system flushing, chlorination, TMV commissioning checks, and legionella risk assessment support to meet warranty and health‑and‑safety requirements.
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Drainage Commissioning & Pre‑Adoption Surveys

We provide drainage commissioning, inspection chamber checks, CCTV surveys, soakaway/percolation support, and pre‑adoption inspection assistance to help smooth the transition to local authority adoption.

Our Other Plumbing & Heating Services

Our Other Drainage Services

Why Choose GasWise?

Here’s why property developers partner with GasWise for new builds:
  • Accredited & Trusted: All of our engineers are Gas Safe, OFTEC, and Worcester Bosch-accredited, keeping your systems safe
  • Documentation-First Approach: Commissioning certificates and asset registers every time - helping you pass warranty inspections
  • Scalable Workforce: From single‑plot commissions to multi‑plot rollouts, we allocate our team to suit your schedule
  • Single Point of Accountability: One project manager, consolidated reporting, and a clear chain of responsibility from install to handover
  • Aftercare That Reduces Claims: Fast defect response and transparent costs to limit homeowner disruption and warranty spend

What Areas Do We Serve?

Based in North Oxfordshire, we are well placed to support developments across the local areas, including:

  • Bicester
  • Warwick
  • Brackley
  • Banbury
  • Leamington Spa
  • Daventry
  • Chipping Norton
  • Morton in the Marsh
  • Stratford-upon-Avon

Ensure Compliant Plumbing, Heating, and Drainage With GasWise

If you’d like pricing for single plots, a package for a small development, or a managed rollout for a large site, please give our development team a call on 01295 597 961 or email This email address is being protected from spambots. You need JavaScript enabled to view it.. We can provide programme rates and proof of accreditations on request, or answer any questions you may have about how we work.

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