Who You Need to Build a Private House: A Complete List of Specialists and How to Find Them
Planning to build a house? We break down which specialists are needed at every stage — from surveyor to painter — and where to find them without overpaying or running into unreliable contractors.
Building a house is not one contractor — it's a whole team
Many clients who tackle building a private home for the first time underestimate the scale of the project. It seems simple: hire a construction crew and you're done. In practice, you need at least five different specialists just for the foundation and shell, and the finishing work requires just as many more.
This article provides a complete list of the trades involved in building a house, explaining exactly what each one does and at which stage to hire them.
Construction stages and the specialists you need
1. Preparation stage
Land surveyor — the first person on site. Conducts a topographic survey, establishes plot boundaries, and identifies elevation changes. Without this, it's impossible to lay the foundation correctly.
Architect / structural designer — develops the house project. Without approved drawings you can't get a building permit, and building "by eye" means risking structural errors that will surface in 5–10 years. Budget: standard plans from a few thousand, custom designs significantly more.
Legal consultant / cadastral engineer — processes the building permit and verifies land title documents. If you skip this step, the house can be classified as an illegal structure.
2. Foundation
Excavator operator — digs the pit or trenches for a strip foundation. Usually hired with equipment for one to three days.
Concrete workers / rebar installers — tie the rebar cage, install formwork, and pour concrete. This is a separate crew or specialist company. The foundation is the most critical stage: mistakes here are irreversible.
Geotechnical engineer — if the soil is unknown, a soil investigation is essential, especially on sites with high groundwater or peat.
3. Shell construction
Bricklayers / masons — lay aerated concrete, brick, or block. One of the most common hiring requests is "find a bricklayer for my house." A skilled mason works fast and true; a poor one leaves crooked walls for years.
Carpenters / timber frame installers — for timber or frame houses, this is the primary crew. They also assemble the roof truss system.
Steel erectors — for steel-frame construction.
4. Roof
Roofer — installs the roofing material (metal tile, standing seam, flat roof, clay tile). The roof is critical: a leak a year later costs far more than saving money on a skilled roofer.
Gutter installer — often part of the roofing crew but sometimes hired separately.
5. Building services — the most underestimated stage
Most clients think about finishes and forget that all utilities must be roughed in first. Each discipline requires its own specialist:
Electrician — designs and installs wiring, the distribution board, and earthing. Must be licensed. Work must meet local code standards or the building won't pass inspection.
Plumber — runs water supply and drainage pipework and installs fixtures. Drainage mistakes are the most unpleasant and expensive to fix.
Heating engineer — designs and installs the heating system (radiators, underfloor heating, boiler). Often the same person as the plumber, but ask specifically about heating experience when hiring.
Gas engineer — if gas heating is planned, only a licensed company may carry out the gas connection. No solo freelancers here.
Ventilation specialist — installs ventilation and, if needed, a heat-recovery unit. In well-insulated modern homes, without proper ventilation you'll get condensation and mould.
6. Insulation and façade
Insulation installer / façade system specialist — insulates the walls externally (rendered system, rainscreen cladding, or siding). This directly affects heat loss and energy bills.
Render applicator — applies the final façade coating.
7. Interior finishing
Plasterer — levels walls. Good plastering is the foundation of a clean finish.
Tiler — lays tiles in bathrooms, kitchen, and hallway. One of the most visible results — poor workmanship is immediately obvious.
Decorator / painter — paints walls and ceilings. Looks simple, but a quality finish requires proper surface preparation.
Floor layers: screed layer + finish installer — pour the screed and install the finish floor (laminate, parquet, LVT).
Dryliner / partition installer — builds partitions, suspended ceilings, and niches.
8. External works
General labourers — waste removal, site levelling, and general construction tasks that don't require a specialist trade.
Landscape designer / gardener — if you want planted grounds.
Paving installer — lays block paving or stone on paths and the driveway.
Complete list: who and when
| Specialist | Stage |
|---|---|
| Land surveyor | Preparation |
| Architect / designer | Preparation |
| Excavator operator | Foundation |
| Concrete / rebar crew | Foundation |
| Bricklayers / carpenters | Shell |
| Roofer | Roof |
| Electrician | Building services |
| Plumber | Building services |
| Heating engineer | Building services |
| Plasterer | Interior finishing |
| Tiler | Interior finishing |
| Painter / decorator | Interior finishing |
| General labourer | Throughout |
Do you need a site manager?
If you're not a construction professional — yes, you do. A site manager (project manager / foreman) coordinates all specialists, monitors quality, controls material usage, and keeps the schedule on track.
Without one, you become the construction manager yourself: visiting the site daily, resolving conflicts between crews, chasing deliveries. That's a full-time job for two to three years.
Where to find construction specialists
Personal recommendations — the most reliable method, but rarely produces the right specialist at the right time and price.
Local classifieds — Craigslist, Gumtree, and regional Facebook groups. Plenty of offers but hard to verify qualifications.
Turnkey construction companies — take on the entire process but cost significantly more and often subcontract to the same freelancers at a 30–50% markup.
Specialist platforms — for example, redraf.com, where professionals post profiles with portfolios and reputation scores. Find a bricklayer, electrician, roofer, and site manager in one place, read reviews, and contact them directly — no middlemen.
How to avoid unreliable contractors
Check their portfolio. Ask for photos of real projects — ideally visit a completed site in person. A confident professional won't refuse.
Don't pay everything upfront. A standard arrangement: 30% deposit, 40% on completion of the main work, 30% after handover inspection.
Put everything in writing. Even a simple contract describing the scope, materials, and timeline protects you in disputes.
Look at reputation. On platforms like redraf, every specialist has ratings and reviews from previous clients — this saves time on verification.
Don't chase the lowest price. In construction, this almost always means saving on materials or experience. Redoing a foundation or roof costs many times more than hiring a competent person in the first place.
Frequently asked questions
Can I hire one crew for the whole house?
In theory yes, in practice it's difficult. Truly skilled all-round crews are rare. A "turnkey crew" is often a team where everyone does a bit of everything but nothing brilliantly. For critical stages — foundation, electrics, plumbing — hire specialists in those trades.
How many specialists will I need in total?
For a typical house of 100–150 m², you'll work with 10 to 20 different specialists across the various stages. Some work in parallel, some sequentially.
Where do I start if construction is still at the planning stage?
Start with the architect — without a design, none of the other specialists are relevant yet. While the drawings are being prepared, commission a surveyor for the topographic survey and begin researching site managers in your area.
How do I monitor quality if I don't have a construction background?
Hire a clerk of works (independent inspector) — a specialist who checks the crews' work at every stage. This typically costs 2–5% of the budget and pays for itself many times over: they catch problems before they're buried under concrete or covered by finishes.
Summary
Building a private house is a project involving 15–25 specialist participants, stretched over 1–3 years. The better you understand who does what, the easier it is to manage the process, keep to budget, and get the result you want without unpleasant surprises.
You can find most of the specialists listed here on redraf.com — with profiles, ratings, and direct contact.