Short answer & context
This page deliberately answers a narrowly defined planning question. It connects the specific configuration with a checklist so quotations, authority guidance and technical decisions are not mixed together.
With 80 m² and 3 rooms, room count alone is not the deciding factor. Circulation, storage, building services and furniture must work together. An early area schedule prevents a plan that fits on paper but lacks usable circulation or support space.
Example area schedule
| Use | m² |
|---|---|
| Living/dining/kitchen | 30 |
| Private rooms | 27 |
| Services/utility | 12 |
| Circulation/reserve | 11 |
Decision in 5 steps
- Define the goal, site and scope in writing.
- Mark missing documents and assumptions.
- Calculate or quote at least two comparable variants.
- Verify dynamic items such as rates, funding, tariffs or local law at the current date.
- Document the decision, source and date.
Document this configuration clearly
| Parameter | This guide |
|---|---|
| House type | timber prefab house |
| Area | 80 m² |
| Rooms | 3 |
The table is not a substitute for design documents. It works as a cover sheet for comparing quotations and decisions: when one parameter changes, record which costs, technical evidence, deadlines or permission questions change with it.
Current 2026 context
For planning questions, a sound sequence is to define requirements, compare options on the same assumptions, clarify interfaces and only then choose. This avoids one early choice unnecessarily constraining the rest of the project.
Document and quotation checklist
- Current drawing/design revision with date and version.
- Specification with clear included and excluded work.
- Quantities, quality level, products or technically equivalent requirements.
- Interfaces with plot, foundation, building services and external works.
- Price date, validity, payment schedule and variation rules.
- Open authority, funding, finance or insurance questions with owner and deadline.
- Differences between quotation, contract, selections and later change requests.
The more complex the project, the more useful an independent review by the appropriate professional becomes. Ideally that review happens before a binding signature, not only after a dispute has arisen.
Avoid common mistakes
Planning contingency is not wasted budget. It prevents each unexpected detail from immediately changing finance or schedule.
- Treating brochure price as total project cost.
- Assuming unclear work is included.
- Using outdated funding, legal or price information without checking.
- Approving changes without a revised plan and cost impact.
Frequently asked questions
Are the figures a quotation?
No. Figures and graphics are for orientation. Real prices, finance, insurance, permission and technical design depend on the project and current conditions.
Why show sources and update dates?
Construction prices, funding, rates, tax rules and legal requirements can change. Sources and dates help identify outdated assumptions.
What should I do next?
Cross-check the open checklist items against plot documents, supplier quotation, authority guidance or the responsible professional and record the answers.
Can I use this to compare quotations?
Yes, as a structure. The scope, quantities, quality level and interfaces must actually be described consistently in each quotation.