International planning tool
Home Space Decision Assistant
Make confident decisions about your future home. We translate household needs into a clear room program, gross area, and land fit so you can avoid overbuilding, under‑sizing, or wasting land.
Also known as Smart Home Space Planner • House Size Decision Tool • Living Space Advisor
How the calculator works (international, not country‑specific)
The goal of this calculator is simple: transform “How big should our house be?” into a clear, defensible program of rooms and areas. It does not rely on any local building code. Instead, it uses globally used architectural planning benchmarks: sleeping zones scale with occupants, living zones grow with household activity, and circulation space expands as the number of rooms increases. The result is a balanced net area, then a gross area that adds realistic allowance for walls, storage shafts, and technical thickness.
You start by describing your household in human terms. We ask how many people will live in the home, the household type (single, couple, family, extended family), your comfort level, and whether you expect future growth. Optional inputs such as land size and extra rooms help the calculator validate the footprint and recommend a more suitable layout, including the option of a two‑storey plan when land becomes tight.
Every output is expressed in plain language. Tables break down bedroom counts, living spaces, optional rooms, sanitary spaces, and circulation. This prevents guesswork and lets you compare plans with confidence. The entire page is server‑rendered so search engines can fully index the explanations and tables. The result is a high‑clarity tool for planning, budgeting, and long‑term comfort.
Use the Home Space Decision Assistant
Tell us about your household
What you will get
- Bedroom count and sizing by occupants
- Living, kitchen, dining, and day‑space estimates
- Sanitary program (bathrooms + WC)
- Circulation allowance based on rooms + people
- Net and gross area totals with explanations
- Land compatibility check when land size is provided
This is a planning and sizing tool. It is not a local regulation, permit, or budget approval. Use it to align your program, then validate with a professional for your location.
From the article
Use this calculator with confidence
This calculator turns the article guidance into a clear room-by-room program.
Results overview
Start with the high-level numbers first. These summarize the size, room count, and circulation allowance so you can decide if the program feels compact, balanced, or spacious before diving into the detailed tables.
Complete the form to generate your results summary.
What this means for you
These notes interpret the results in everyday language so you can plan with confidence.
Submit the form to receive human-readable guidance.
Alternative sizing options
Use these as a quick decision set if you want to adjust comfort or footprint without changing the room count.
Alternatives appear after your first calculation.
Detailed breakdown
The tables below show the full room program. Each table is labeled so it stays readable on mobile without horizontal scrolling.
User inputs summary
| Parameter | Value |
|---|---|
| Submit the form to summarize your inputs. | |
Bedrooms
| Room Type | Quantity | Area per Room (m²) | Total Area (m²) |
|---|---|---|---|
| Complete the form to calculate bedroom sizes. | |||
Living and day spaces
| Space | Quantity | Area (m²) |
|---|---|---|
| Complete the form to calculate day-space areas. | ||
Additional rooms
| Space | Quantity | Area (m²) |
|---|---|---|
| Optional rooms will appear here. | ||
Sanitary spaces
| Space | Quantity | Area per Unit (m²) | Total Area (m²) |
|---|---|---|---|
| Sanitary sizing will appear here. | |||
Circulation
| Element | Calculation Method | Area (m²) |
|---|---|---|
| Circulation results will appear here. | ||
Total areas
| Category | Area (m²) |
|---|---|
| Total areas will appear here. | |
Land compatibility
| Parameter | Value |
|---|---|
| Provide land size to evaluate footprint compatibility. | |
Recommendations & next steps
The calculator translates raw numbers into clear recommendations. Use these to decide whether you should shift to a two‑storey option, add a bedroom for privacy, or focus on saving land for outdoor comfort. These recommendations are intentionally general and internationally applicable.
Submit the form to receive personalized recommendations.
FAQ for your results
Short answers to the most common questions about the numbers above.
Run the calculator to see FAQ answers tailored to your result.
Related plans and educational resources
Planning works best when you can immediately compare real plans that match your size program. Below are a few relevant plans and educational articles to keep your decision grounded in real examples.
Recommended house plans
- Single-Level Tiny House with Terrace — This tiny house plan presents a compact yet fully functional single-level residence with clearly defined interior spaces and an exterior terrace, offering efficient living within a total interior area of 35.78 m² (approximately 385 sq ft).
- Compact Single-Bedroom House with Dual Terraces — A compact, single-level residential plan featuring a clear separation between living and private zones, complemented by two exterior terraces that extend the usable living space.
- Compact Single-Bedroom House with Covered Terrace — This compact single-story house plan is designed to deliver comfortable everyday living within a well-organized and efficient footprint. All spaces are arranged on Level 0, ensuring ease of movement and accessibility while maintaining a clear separation between living, sleeping, and service areas...
- Single-Storey Compact Family House with Central Living Core and Covered Front Terrace — This single-level house plan presents a well-balanced residential layout combining a generous central living space with clearly separated private rooms and a welcoming front terrace, designed for everyday comfort and efficient circulation.
- Compact Single-Storey House with Integrated Garage and Veranda — This single-storey residential plan features a clear and efficient layout with two bedrooms, a central living area, a compact kitchen, an integrated garage, and a covered veranda, designed for practical everyday living.
- Single-Storey 3-Bedroom Residence with Front Veranda and Integrated Garage — A compact single-storey residential design featuring three bedrooms, a central living area, an integrated garage, and a covered front veranda, organized for clear circulation and practical daily use.
Educational articles
- The Blueprint for Sanity: How to Pick the Perfect House Plan — s your dream home a future nightmare? Read our honest guide to choosing a layout that works for real life, not just for
You can also explore the Space Planner tools for room‑level checks.
Why these rules are trustworthy
The sizing logic uses global residential planning norms: a minimum master bedroom that scales with household size, secondary bedrooms sized to allow sleeping and circulation, living spaces that expand with social activity, and a circulation ratio that grows as the plan becomes more complex. These are not legal limits; they are the practical ranges used by architects to reduce daily friction. Because the same family behavior appears worldwide, these rules travel well across climates and budgets.
This is why the calculator never returns a single "magic" number. Instead, it explains how each area was derived and keeps every decision visible. That transparency is what turns a simple calculator into a planning tool you can trust.
Recommended Reading
How Big Should a Kitchen Really Be? A Practical Guide to Choosing the Right Kitchen Size
How big should your kitchen really be? Explore practical sizes for every lifestyle, from 5m² studios to 12m² hubs. Find the right fit for your daily habits.