modern cavity construction, service voids designed in, plasterboard on dabs. Service voids and pre-planned cable routes make additions straightforward — but the developer board is often the bottleneck.
New-build CUs are compliant but full — the fix is usually a spare-way add and an SPD retrofit, not a swap.
If you own a new-build in Mountain Ash and need consumer unit upgrades, the right spec is usually not the most expensive one. On this stock the sensible answer is spare-way CU add — matched to the wiring generation, not a lift-and-shift from a new-build brochure.
That is the standard we quote to. Fixed price, honest survey, SPD retrofit inside the existing enclosure, and paperwork the next EICR won't question.
New-Build House properties are a distinctive part of the Mountain Ash housing mix — Edwardian terraces in Penrhiwceiber, ex-NCB cottages in Miskin, and post-war estates in Abercynon, particularly around Penrhiwceiber & Abercynon. We work on this stock weekly.
Service voids and pre-planned cable routes make additions straightforward — but the developer board is often the bottleneck.
Wiring generation on this stock is typically current — often 17th or 18th Edition compliant at handover but with no headroom. On a new-build you should expect us to flag: developer CU maxed out — no spare ways for an EV charger or garden feed; no SPD retrofit, which the 2022 amendment now expects; EV cable stub left by the developer that terminates at an isolator, not a working charger.
Materials and methods we spec on new-build house work: spare-way CU add; SPD retrofit inside the existing enclosure; OCPP-compliant charger onto the developer stub. Everything is priced on the quote — nothing added on invoice.
Focus on the utility room or garage, the consumer unit location, and the intended cable route. Usually 15–30 minutes on-site or a short photo set.
Priced against your new-build's specific construction, not a template. Route sketched, materials listed, no line-item surprises.
Diary planned for the access constraint that matters on this stock — service voids and pre-planned cable routes make additions straightforward — but the developer board is often the bottleneck.
NICEIC certificate, photo evidence of hidden work, Part P where applicable — all emailed the evening the job signs off.
Common enough that we work on this stock most weeks. Edwardian terraces in Penrhiwceiber, ex-NCB cottages in Miskin, and post-war estates in Abercynon — the new-build is a recognisable slice of that mix.
Almost never. A spare-way add on the side of the existing board plus an SPD retrofit covers 90% of new-build enquiries.
Service voids and pre-planned cable routes make additions straightforward — but the developer board is often the bottleneck. We mark the route at survey and price against it.
No — surveys for Mountain Ash new-build enquiries are free. You only pay once the fixed-price scope is agreed.
For a new-build usually yes — a 15-minute survey or a set of photos of the utility room or garage and the consumer unit is enough to write a fixed price.
Beyond Mountain Ash itself, we regularly cover new-build work across Aberdare, Pontypridd, Merthyr Tydfil on the same fixed-price model — same materials, same certificate format.
Practical next step: photos of the utility room or garage or a 15-minute survey, fixed written quote back inside 24 hours, work booked around your add what the developer skipped. That's the whole process for a Mountain Ash new-build, on one page.
One local point of contact for new-build house work across Mountain Ash and the surrounding Aberdare / Pontypridd area — quote, work, certificate and after-care.
