Architectural survey and chartered surveyor survey — two complementary processes
- Antoine de Gironde
- May 28
- 3 min read
Before starting any renovation or restoration, accurate knowledge of the existing building is essential. Two surveys are carried out during this preparatory phase: the chartered surveyor’s survey, which certifies dimensions, and the architectural survey, which adds a qualitative assessment of the building. These two surveys are complementary. For historic buildings, coordinating them is central to the diagnostic work the project architect undertakes before any intervention.
The chartered surveyor’s survey — certified measurements
The chartered surveyor delivers a certified dimensional survey that is legally binding for third parties. Dimensioned drawings, floor areas defined under planning law, co-ownership division statements, and parcel boundary surveys — these documents are admissible before notaries, authorities and courts.
For renovation projects, the chartered surveyor’s survey gives a reliable, indisputable basis: exact measurements, certified areas and established boundaries. It’s often the starting point the architect builds from.
The architectural survey — adding qualitative insight to the measurements
The architect usually takes the chartered surveyor’s drawings as a starting point and enriches them during the on‑site visual diagnosis. Measurements tell you the geometry — the architect reads and documents everything measurements miss.
Construction techniques come first: ashlar or rubble stone, brick, timber framing, joisted or concrete floors, vaults and arches. Each material has specific characteristics, likely defects and limits regarding possible interventions. The architect identifies and maps these elements and draws early conclusions about what’s feasible.
Colour comes next: the tones of renders, windows and metalwork. In protected zones, colour analysis is crucial — sondages can uncover original colours hidden beneath many paint layers, like the château‑yellow discovered on the carriage‑house door of the Maison du Modèle, rue des Tournelles in Versailles.
The survey also records material condition and visible defects — cracks, detached render, leaks, structural issues — and signs of the building’s successive alterations (raised levels, new openings, interior reconfigurations). These are details a dimensional survey cannot capture; they require the architect’s careful on‑site observation.
The visual diagnosis — a foundational step
During the diagnostic visit the architect ‘reads’ the building — how it began, how it has changed, what can be kept and what needs intervention. That reading shapes every choice: materials, methods and the phasing of works, and it determines the clarity of the CCTP used to tender the work. The more exact the diagnosis, the fewer unknowns that could lead to unexpected extra work.
For historic buildings this close reading is essential. Too-brief diagnostics lead to unpleasant site discoveries — hidden rotten structure behind a render, a failing floor under a finish, or masonry incompatible with the proposed system. An architect‑enriched survey significantly lowers that risk.
What it means for the client
A project based on an architect‑enriched survey starts from solid foundations. The project owner knows what they have, what can be done, and what it will cost — without the nasty surprises that derail budgets and timetables.
For this reason the Atelier always carries out a thorough visual diagnosis before any design work, using the géomètre‑expert’s survey when available. Combining certified dimensions with a qualitative reading of the building is central to our project‑management approach in heritage contexts.
We also often draw on prior archival research (old drawings, historic permits, and photographic sources) to inform the diagnosis and support the choice of interventions.
To go further
Antoine de Gironde
Architecte DESA — Registered with the Order of Architects n°084305
Atelier d'Architecture Antoine de Gironde
10 rue de Fontenay, 78000 Versailles
