Phase Zero in Practice: What Clients Need to Know — Before Commissioning a Design
You have a plot, an existing building, or an idea. Before you commission an architect to plan it, there’s a phase that determines everything that follows. It’s called Phase Zero — and most clients don’t know it exists.
The most expensive mistakes happen before Service Phase 1
A project rarely fails at the execution-planning stage. It fails because of wrong assumptions made much earlier: a plot that doesn’t actually allow what was hoped for under planning law. A use that doesn’t work economically. Stakeholders who were brought in too late.
Phase Zero is the moment when these assumptions are put to the test — in a structured, methodical way, with a clear outcome.
What you take away from a Phase Zero as a client
A well-executed project preparation gives you concrete answers to the most important questions:
Is my project feasible? Planning law, existing structure, access — what is actually possible?
Which use makes sense? Not every intended use fits every site. Phase Zero surfaces alternatives and evaluates them objectively.
What will it really cost? No guarantee, but a reliable order of magnitude — based on real parameters, not wishful thinking.
What do I need to decide, and when? A clear recommendation: keep planning, adjust course, or rethink entirely.
When is a feasibility study especially worthwhile?
Phase Zero services aren’t equally relevant to every project. They’re particularly valuable for:
- Change-of-use and conversion projects — when an existing building is to take on a new function
- Existing properties with unclear potential — when it’s unclear what’s possible under planning law and economically
- Purchase decisions — before a plot or building is bought
- Projects with multiple use scenarios — when different options need to be weighed against each other
How alma:s Architekten implements Phase Zero
At alma:s Architekten, structured project preparation is one of our core services. Our feasibility studies aren’t box-ticking exercises — they are honest, methodically grounded analyses that give you, as the client, a solid basis for decision-making.
Our focus is on change-of-use, existing-building conversions and conversion projects in the Rhine-Main region. We know the planning-law framework in the region, the requirements of the approval authorities — and we know which questions need to be asked before anyone starts drawing.
A feasibility study with us costs a fraction of what wrong decisions in later phases would cost.
Conclusion: think first, then plan
The Baukulturbericht 2026/27 confirms what experienced planners have known for years: quality doesn’t come from better plans alone — it comes from better questions at the outset.
If you have a project where you’re not sure whether or how it’s feasible, get in touch. That’s exactly the moment Phase Zero is made for.
This article is part 3 of a three-part series on Phase Zero: What Is Phase Zero? · Baukulturbericht 2026/27: Phase Zero as a Requirement