Before buying or starting works, a technical diagnosis separates a controlled project from a risky gamble. Performance BTP examines the property without complacency and turns every finding into a costed decision.
A property can look sound yet hide costly defects: weakened structure, ageing networks, latent damp, hazardous materials. The technical diagnosis spots these before they become money pits. We inspect the structure (cracks, levelness, settlement), the networks (electrical, plumbing), insulation, ventilation and signs of damp.
The goal is not to alarm but to clarify: what is sound, what needs attention, what is critical.
Buy or not? At what price? With what works budget? The diagnosis answers these questions. For a buyer, it becomes a negotiation tool: costing the necessary works lets you adjust an offer. For a project owner, it sets a realistic framework before committing.
Performance BTP combines hands-on renovation experience with analytical tools (measurements, budget modelling) to deliver a reliable, readable diagnosis. Not a theoretical report, but an operational reading geared towards action and budget.
Our diagnosis follows a structured protocol covering the entire property. 1 — Load-bearing structure: walls, slabs, beams, cracks (mapping and activity analysis). 2 — Waterproofing and roof: covering, guttering, flat roofs, expansion joints. 3 — Electrical systems: consumer unit, earthing, cable sections, NF C 15-100 compliance. 4 — Plumbing: pipe materials (lead, galvanised steel, copper, PER), drainage condition, pressure. 5 — Insulation and thermal performance: walls, floors, windows — with current and potential EPC rating estimate. 6 — Ventilation: single or double-flow VMC, grilles, extractors. 7 — Finishes: floor coverings, joinery, fixtures and fittings.
Beyond the expert eye, we use measuring instruments to objectify our findings: thermal camera (detection of thermal bridges and invisible infiltrations), moisture meter (precise measurement of moisture levels in walls and floors), electrical tester (earthing and cable section verification), laser rangefinder (precise measurements for budget estimation). These tools detect pathologies that the naked eye cannot see — pathologies that can cost tens of thousands of euros if ignored.
A diagnostic visit lasts on average 2 to 4 hours depending on size (90 minutes for a 3-bedroom flat, 3 hours for a 120 m² house). The report is delivered in digital format (illustrated PDF) within 48 to 72 hours of the visit. We cover the entire Greater Paris region (75, 78, 91, 92, 93, 94, 95). For properties on the Côte d'Azur, contact us — ad hoc missions are possible.
A buyer about to sign for a flat in the Paris region commissioned a technical diagnosis. The finding: electrics needing a full overhaul and early-stage settlement to monitor. With the works costed, he renegotiated the price by 18,000 € — far more than the diagnosis cost. Without it, the bill would have landed after the purchase.
Don't confuse mandatory regulatory diagnostics (energy performance, asbestos…) with an opportunity-driven technical diagnosis. The former protect the seller; the latter protects YOUR interests as a buyer or project owner. Both are complementary.
Advisory, project management, training and business development support. First exchange free and with no commitment.