An existing building comes with a design brief written partly by time. Old drawings may be incomplete, systems may have changed and the structure may not behave as expected. The architect’s first contribution is often to identify what is known, what is assumed and what must be opened up or surveyed before a decision is safe.
The AIA’s guide to building reuse treats adaptation as a significant part of climate-oriented practice. AIA also reports that renovation and related work accounts for almost half of U.S. architecture billings in its reuse resource. That is context for U.S. firms, not a promise that every retrofit team is hiring today.
Make an uncertainty register
Take an existing-building project and list the facts you have: measured survey, drawings, photos, maintenance records, structural report, services information, access constraints and known defects. Give each a date and source. Then list decisions that depend on uncertain information.
For example: “Can the new stair fit?” depends on actual floor levels, structure, headroom and code requirements. Do not resolve the question from an old plan alone. Assign an investigation owner and a decision date.
Show how constraints produce design
A retrofit proposal should explain what was retained, altered or removed and why. Show one option you rejected because of an existing condition. A before-and-after rendering may attract attention, but a section that reveals a floor-level conflict shows your value to the project team.
If you work on occupied buildings, include the operational sequence: which area stays open, where the temporary route goes and what work creates disruption. If your experience is on new-build projects, demonstrate analogous skills in phasing, consultant coordination and technical problem solving, while being clear about what you still need to learn.
Ask better questions in a job interview
How does the firm survey buildings? Who decides when intrusive investigation is justified? How are surprises priced and documented? Which specialists join early? What proportion of work is adaptive reuse versus simple refurbishment? A strong practice will not claim that every unknown can be eliminated. It should show a process for handling discoveries.
Create a work sample without exposing client data
Use an approved project or a public building and make a one-page “known / assumed / investigate” diagram. Add a decision that would change depending on the investigation result. That demonstrates judgement without inventing a commission.
A field-note method for uncertain buildings
For every important condition, record three items: what you observed, how certain you are and what decision depends on it. “Wall appears loadbearing” is an observation and hypothesis, not a structural conclusion. “Structural engineer to verify before opening is fixed” is the next action. Keep photographs, dates and drawing references linked to the note so another team member can trace it.
Prioritise unknowns by consequence. A hidden service route that could move a stair may need investigation before concept sign-off; a finish colour can wait. This turns a vague “existing buildings are unpredictable” complaint into a decision plan. It also helps a client understand why a survey or opening-up work is valuable before committing to a fixed design or budget.
For a career sample, present one constraint and two possible design responses, each dependent on a different survey result. Show who would investigate and at what stage. This is more persuasive than a glossy image that assumes the building matches an old plan. The AIA guide to building reuse provides further context for the value of adapting what exists.
The retrofit mindset is transferable: ask what the building already knows that the drawing does not. If you enjoy turning uncertainty into a responsible design path, existing-building work may be a strong career direction.
Make the survey brief follow the design risk
An existing-building survey should answer decisions, not merely create a larger folder of photographs. Before visiting, write three design questions whose answers could change the scheme: perhaps structural capacity near a new opening, concealed services above a ceiling or the usable width of an escape route. For each, specify what can be observed safely, what specialist investigation may be needed and who will decide whether to proceed. Do not ask a junior architect to certify hidden conditions by eye.
After the visit, label each note observed, reported by others or assumed. Add a photograph or drawing reference and a date. A later team member can then distinguish a measured dimension from a client’s recollection. Turn high-consequence unknowns into an investigation plan with owners and deadlines before the design becomes too expensive to change.
In an interview, ask the employer for an example of a surprise found after work began. How did the team communicate it to the client, update the programme and record the changed decision? A practice that expects surprises but has no method for them may be a difficult place to learn retrofit work. A good process does not eliminate uncertainty; it makes the remaining uncertainty visible enough to manage.
Browse current architecture jobs on Jobs.archi and read our guide to the gap between architecture school and practice for a related next step.
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