Model Scale for Apartment Block: Choosing 1:100 or 1:200

Choosing the right model scale for an apartment block is one of the first decisions a developer or architect makes when ordering a physical model, and it is often made too casually. A scale that looks sensible on paper can produce a model that is either too small to show the balconies buyers care about or too large to carry through a meeting room door. Across architecture designs kenya, apartment blocks are getting taller, denser and more varied, which makes the question harder than it was for a simple maisonette. The scale you pick controls the model's footprint, its height, its cost and how much of the story it can tell. In this post we compare 1:100 and 1:200 for a multi-storey residential block, explain how site and audience should steer the choice, and cover the checks that prevent expensive surprises. By the end you should be able to walk into a conversation with a model maker knowing what to ask for and why.

Why scale decides what your model can show

Scale is simply the ratio between the model and the real building, so at 1:100 every metre of the building becomes ten millimetres on the table. That sounds like a technical footnote, but it controls everything the viewer sees. It decides how thick a floor slab looks, whether a balcony reads as a projection or a smudge, and whether windows have visible depth. It also decides how much ground around the building fits on the base. Every other choice, from materials to lighting, sits inside the limits that scale sets.

Apartment blocks make this decision more demanding because they repeat. A block with ten or twelve typical floors has the same balcony, window and slab detail stacked again and again, so a small error in legibility is multiplied across the whole façade. If the scale is too small, the repeated floors blur into a striped box and the rhythm that the architect designed disappears. Different viewers also read the model differently. A buyer or investor wants to understand the units and outdoor spaces, while a planning reviewer wants to see the whole plot, the setbacks and the neighbouring buildings. Deciding which of those readers matters most is the real starting point for choosing a scale.

Model scale for apartment block projects: how 1:100 and 1:200 compare

At 1:100, a block that is 30 metres tall comes out at about 300 millimetres, and a typical 3 metre floor height becomes 30 millimetres. That is enough room to show slab edges, balcony projections, glazing lines and window reveals in a way people can actually see. A balcony that projects 1.5 metres sticks out 15 millimetres from the façade, which casts a real shadow under good lighting. Parapets, roof plant enclosures and stair cores can also be modelled with believable proportions. The cost is footprint, because a plot of 60 by 40 metres already needs a base of 600 by 400 millimetres before any surroundings are added.

At 1:200, the same 30 metre block shrinks to roughly 150 millimetres, and each floor is only 15 millimetres high. The advantage is context, since a site of 150 by 100 metres fits on a base of 750 by 500 millimetres, which is easy to carry and place on a standard board. Roads, parking areas, neighbouring buildings and boundary walls can all appear without the model becoming unwieldy. Fine details have to be simplified, so balconies become slim projections and window reveals turn into shallow lines. Most Nairobi projects with ground-floor retail and typical residential storeys land between these two scales, and the deciding factor is usually how many floors you want to show clearly and how much of the surroundings must stay in view.

Matching the scale to the site and the audience

When the purpose of the model is to sell or explain the building itself, the larger scale usually earns its place. Balconies, recessed entrances, screens and shading devices all depend on depth, and depth only reads when the scale gives it room. In that case it is often wiser to crop the plot, showing the block with just enough ground around it, than to shrink the whole thing and lose the features that make the design distinctive. A cropped base also keeps the model proportionate for a showroom or sales office. The neighbouring plots can be suggested with simple blocks at the edges so the viewer still senses where the building stands.

When the main question is how the block fits into its surroundings, the smaller scale works better. Access roads, turning space, parking, drainage reserves and the height of nearby buildings all matter to a planning officer or a lender, and they only appear when the base is wide enough to hold them. At 1:200 you can show the whole neighbourhood relationship without needing a table the size of a door. Many projects need both stories, because investors and municipal officers each look for different evidence. In that case, planning a smaller context model alongside a detailed block model from the start saves rework, because the two can share drawings and be built in one programme instead of one being retrofitted later.

Practical checks before you commit to a scale

Begin with the physical numbers. Measure the largest footprint and the tallest element of the design, including any lift overrun or roof feature, then convert them to the candidate scale and compare them with the board or display case you intend to use. Leave a margin of at least 50 millimetres around the edge of the model for handling and for the viewer's eye. Remember that a model also needs space to be lifted, which means a case or crate larger than the base itself. Doing this arithmetic early takes ten minutes and can prevent a model that does not fit through the door of the meeting room.

Next, test the smallest feature you need to show. A balcony 600 millimetres deep becomes 6 millimetres at 1:100 but only 3 millimetres at 1:200, and that difference decides whether it reads as a balcony or as a thin ledge. The same is true of louvres, fins, planters and column spacing. A useful rule is that any feature the audience must notice should be at least several millimetres wide in the finished model. If it falls below that, either move up in scale or agree openly that the feature will be exaggerated slightly for readability.

Finally, confirm the decision against the drawing set with the architect before any cutting begins. Every floor level, setback, parapet height and balcony projection should match the source drawings at the chosen ratio, and any late design change should be flagged then rather than after the model is assembled. It helps to agree which drawing revision is the reference, because models built from superseded sheets are one of the commonest causes of disappointment. A short written note recording the scale, the base size and the drawing revision keeps everyone aligned. That small document costs nothing and protects both the client and the model maker.

Avoiding an oversized model

An oversized model costs more than most clients expect. Larger scales consume more material, more cutting time and more finishing, and the base, the case and the transport all grow with them. A model that is too big to lift easily is also more likely to be damaged on the way to a client meeting or an exhibition. It can be awkward to fit into meeting rooms and site offices, where space is usually tight and the table is shared with drawings and laptops. Bigger is not automatically better, and a model that cannot be moved or placed well often ends up viewed less than a modest one.

There are smarter ways to keep a large project manageable. A sectional or partial model can show a few typical floors, the ground-floor retail and the roof at a larger scale, while the full block stays at a smaller scale elsewhere. That combination gives viewers the detail that sells the units without forcing the whole project onto a huge base. Another approach is a removable upper section, so the model can be taken apart to reveal a floor or a unit layout. These options only work if they are planned before construction starts, because a model built as a single solid piece cannot easily be converted later.

The best protection against oversizing is to discuss the presentation setting early. Ask where the model will actually sit, whether that is a sales gallery, a boardroom, a county planning office or a travelling exhibition stand. Ask how it will be moved, how many people will view it at once and from what distance. A model viewed by six people across a table can use finer detail than one seen by a crowd from several metres away. Once the setting is clear, the scale usually becomes obvious, and the discussion shifts from guessing to measuring.

Working with Moriasi3D Models on your block

At Moriasi3D Models we have built many apartment block models for developers and architects across East Africa, and the scale decision is part of the very first conversation. Our workshop on Mucai Road, off Ngong' Road in Nairobi, has handled blocks of every height, from four-storey walk-ups to tall mixed-use towers with retail podiums. That experience means we know how balconies, façade grids and rooftop elements behave at different scales before a single piece is cut. We would rather talk through the trade-offs with you at the start than rescue a mismatched model later. A short discussion about audience and space often saves weeks and a good deal of money.

Our process is straightforward. We review your drawings, ask about the audience and the display space, and then recommend a scale and a level of detail that fits the project, including whether a secondary context model or a sectional piece would help. We also flag any features that may need slight exaggeration to stay legible. If you share your plans with us early in the design stage, the model can support your decisions about massing, balconies and site layout rather than arriving after those decisions are already fixed. Bring your drawing set, your site plan and an idea of where the model will be shown, and we will take it from there.

Choosing the right model scale for an apartment block is really a question of what you need people to see and where they will be standing when they see it. A scale of 1:100 gives you floors, balconies and window depth that read clearly, while 1:200 keeps the whole plot and its neighbours on a board that is easy to carry. Most projects benefit from deciding which story matters most, then using a cropped base, a sectional model or a companion context model to cover the rest. Simple checks on footprint, smallest features and drawing revisions will catch most problems before they become costly. Planning the presentation setting early keeps the model proportionate and practical. If you are preparing a block for a planning review, a sales launch or an investor meeting, talk to Moriasi3D Models early and we will help you settle on a scale that shows your design at its best.