
Study
Drawings, 3D visualisation and works permits in Marbella
Layout drawings, technical construction drawings, photorealistic 3D, quantity take-offs and the licencia de obra file. Everything needed to price your project properly — and to build it without surprises.
Why a drawing changes what your works cost
Without drawings, a contractor prices what it imagines. It either protects itself against the unknown by inflating the figure, or underprices and recovers the difference mid-build as extras. Either way, you pay for the uncertainty.
A complete construction package removes that uncertainty. Quantities are known, materials are specified, interfaces between trades are resolved. Firms price the same thing, quotes become comparable, and variations during the build become the exception rather than the rule.
That is why we produce the package before going out to tender, never the other way round.
3D visualisation: decide before you pay
Drawings are hard to read if you are not in the trade. Photorealistic 3D makes the scheme immediately legible: you see the real volumes, the natural light at different hours, the exact tones of the materials, the furniture layout.
Its value is not aesthetic but economic. Changing your mind on a render costs a few hours of work. Changing your mind once the tiling is laid costs removal, re-ordering and two weeks of programme. The 3D is the last moment at which a change of mind is free.
It is especially useful if you do not yet live on the Costa del Sol: it lets you approve the scheme remotely, without travelling.
Licencia de obra: the Spanish paperwork
In Spain almost all building work requires municipal consent. A standard interior renovation — leaving structure, façade and shared services untouched — usually falls under obra menor, a relatively simple declaration. As soon as you touch a load-bearing wall, the façade, shared services or the habitable floor area, it becomes obra mayor and a signed technical project is required.
Depending on the case, you may also need the owners’ community consent, payment of the municipal tax and a deposit covering waste removal. These steps govern when work can start and are a classic cause of delay.
Kasara tells you at the first visit which regime applies, prepares the documents and follows the application through the town hall.
What the package includes
- Survey and drawing of the existing property
- Layout drawings and distribution study
- Partition and demolition drawings
- Technical drawings: electrics, plumbing, air conditioning
- Floor and wall tiling setting-out
- Joinery and fitted furniture details
- Photorealistic 3D of the main rooms
- Detailed quantities by trade
- Specification for the tender process
- Obra menor or obra mayor licence file
How a study runs
- 01
Survey
Visit, measurements, location of existing services and load-bearing elements. Everything else rests on this.
- 02
Concept design
Layout drawings and first distribution options. We agree the approach together before going into detail.
- 03
3D and approval
Photorealistic visualisation of the main rooms, final choice of materials and tones.
- 04
Construction package
Full technical drawings, quantities and specification. The package goes out to tender.
Frequently asked questions
Can I commission drawings only, without the works?
Yes. The study can be commissioned on its own: you leave with a complete construction package, usable by any contractor, in Spain or elsewhere.
How much does a 3D visualisation cost?
3D is included in the interior architecture commission. Commissioned separately it is priced per room, according to the level of detail required — we give a firm price after the first visit.
What is the difference between obra menor and obra mayor?
Obra menor covers interior work that leaves structure, façade, shared services and floor area untouched: the declaration is simple and quick. Obra mayor covers everything else and requires a technical project signed by a qualified professional.
How long does the licence take?
For obra menor, usually a few weeks. For obra mayor, several months depending on the municipality. That period must be anticipated from the start.
Can my own contractor use the drawings?
Yes. The package belongs to you and can be used by any contractor you choose.
See also
Price your project on solid foundations
A first conversation to establish the level of study you need and the permit regime that applies to your works.
