Design Standards
Building Guidelines
The design standards that keep every Sienna villa in harmony with the community and its natural setting.
These guidelines complement the Sienna Terrenas Master Regulation. They ensure every construction — whether a standard villa or a custom build — reflects the project's contemporary, eco-conscious vision and preserves the value of every property. Detailed plans are reviewed and approved by the project's Advisory Committee.
Architecture
- Contemporary architectural style, integrated with the design of the Sienna villas.
- A maximum of 2 levels is permitted.
- No rooftop structures, such as pergolas.
- Flat roofs or roofs with a minimum slope are required; pitched roofs are not permitted.
- Green roofs are strongly encouraged.
- The design must not obstruct the views of neighbouring properties.
- Each facade must include openings or windows; alternatively, a change of materials is required.
- On sloped lots, only constructions supported by columns are permitted. Columns must be dark in colour, set at least 1 metre from the facade, with the spaces between them landscaped.
- Designs must prioritize energy efficiency and minimize environmental impact.
- Villas must harmonize with the natural surroundings, preserving the topography and natural features of the lot as much as possible.
General Directives
- Rooftop solar panel installations must not exceed 40 cm in height.
- Technical installations on roofs (air conditioning, water tanks, ventilation units) are not permitted.
- Air conditioning units must not be visible from the facade.
- Each villa must include its own wastewater treatment system.
- Lots are equipped with electricity and water connections.
- A clear-water filtration system must be included in every villa project.
Materials
- The colour palette must reflect nature — earthy tones, greys or greens that harmonize with the trees, rocks and surrounding landscape.
- White is not permitted for main walls.
- Openings (windows, doors) must be aluminium or wood, in dark colours only.
- Tinted or mirrored glass is prohibited.
- Sustainable and eco-friendly construction materials must be used.
- Only concrete roofs are permitted; aluminium roofs are prohibited.
Lot Design & Dimensions
- Where possible, constructions should follow the natural contours of the land.
- Upstream and downstream facade lengths must not exceed 20 metres.
- The upstream facade height must not exceed 4 metres, measured from natural ground level.
- The downstream facade height must not exceed 11 metres, measured from natural ground level.
- Minimum setbacks: 3 m front, 1.5 m sides, 3 m rear.
- Minimum distance between two constructions: 5 metres.
Noise
- Technical installations such as generators are not permitted.
- Fixed sound systems for outdoor spaces are not permitted.
Parking
- Minimum parking: 1 space for 1–2 bedroom villas, 2 spaces for larger villas.
- Carports must comply with the minimum setbacks (3.5 metres) and be built with approved materials.
Gardens & Boundaries
- Gardens must be designed harmoniously.
- Uncovered stairs and walls must not exceed 2 metres in height from natural ground level.
- Auxiliary structures such as bungalows must follow the same rules as the villas.
- Solid walls are not permitted as dividing fences between lots — only vegetated chain-link fences are allowed.
- The same rule applies along roads: fences and gates are permitted, but not solid walls.
Construction Site
- The construction site must be secured.
- The site must not encroach on access roads or common areas.
- Any damage caused must be repaired and restored to its original state.
Approval Process
- Detailed plans must be submitted for review and approval by the Advisory Committee.
- A collaborative review process is encouraged to ensure all established criteria are met.
Planning a custom build?
Our lead architect helps you design within these guidelines, and our team handles the Advisory Committee approval process.