Restoration / Architecture · Design and Construction
Guide · YOY Mimarlık
Survey, restitution, restoration, reconstruction: what is the difference?
These four terms are often confused, yet the distinction between them is clear — and it directly determines which work you need. In short: a measured survey documents the present, restitution reconstructs the past on paper, restoration repairs what is standing, and reconstruction rebuilds what has been lost.
All four in one sentence each
A measured survey is the complete documentation of a building’s present condition through scaled drawings, photographs and reports. It adds no interpretation; it records what is there.
Restitution is the redrawing, on documentary evidence, of an original state of the building that has not survived. It stays on paper; it does not build.
Restoration is the conservation and consolidation of a standing building and, where appropriate, its return to use. It intervenes in the existing fabric.
Reconstruction is the rebuilding, on documentary evidence, of a building that has been wholly or largely lost. There is no building on site; it is raised again.
Why does the order matter?
These four are not alternatives but, in most cases, links that follow one another. Restitution cannot be made without a survey, because the past cannot be reconstructed without first reading the building’s present traces. And without restitution neither a restoration nor a reconstruction decision can be taken; you cannot decide what to preserve without knowing which period is taken as the basis.
This is why project files show them as a chain: “Survey + Restitution + Restoration” or “Excavation Survey + Restitution + Reconstruction”. The last link in the chain is the real deliverable of that project.
Restoration and reconstruction, on the other hand, are genuine alternatives, and the state of the building determines which applies: restoration if it is standing, reconstruction if it has been lost.
Which one do you need?
If your building is standing and sound but you are considering repair, alteration or a change of use: survey + restitution + restoration.
If your building is standing but severely damaged: the same chain again, though damage and decay mapping carries more weight at the survey stage; if it is unsafe, a partial measured survey is used.
If your building has collapsed entirely: excavation survey + restitution + reconstruction. A conventional survey is not possible; there is no wall left to measure.
If you only need documentation — for a sale, transfer, expropriation, academic publication or insurance: a measured survey on its own is enough.
Getting this distinction right is not only a technical matter but a budgetary one. Adding an unnecessary stage raises the cost; skipping a necessary one gets the file returned by the board.
Frequently Asked Questions
Aren’t restitution and reconstruction the same thing?
No — the difference between them is the difference between paper and building. Restitution draws the original state of the building on documentary evidence and stops there; it is a research and decision document. Reconstruction is the realisation of that drawing on site, together with current structural safety requirements. Every reconstruction is preceded by a restitution, but not every restitution ends in a reconstruction.
What is the difference between a survey and an architectural project?
A survey documents what exists; an architectural project describes what will be built. The survey records the present condition without adding interpretation, while the architectural project describes a future state. In registered buildings you move on to the architectural project only after the survey — the order cannot be reversed.
Doesn’t the word “restoration” cover all of them?
In everyday speech it is used that way, but in legislation and board correspondence the four are separate pieces of work, each with its own sheets, report and approval. Submitting a single file labelled “restoration project” to the board means submitting an incomplete file. So when you request a quotation, ask explicitly which stages are included.