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Rendering of GNÓMON at first light: a fictional seven-storey building of pale stone and glass, its terraces stepping back, on a planted hillside above the river, with the lit windows of the city behind.

Nearly fifteen hours of sun over the Tagus.

Thirty-two residences on a hillside above the river, planned around where the sun falls. On 21 June it is up from 06:11 to 21:04: 14 h 53 min.

First light

Civil dawn at 05:39: the sky is light before the sun is up. Sunrise follows at 06:11, north-east.

Sun 6.0° below the horizon

Lisbon, 21 June. Sample data.

Choose your light

Pick the hours you want to live with. The scene turns to that hour and the matching residences light up.

32 residences, four kinds of light

Every residence faces the river. What changes is when the sun comes in.

See the residences

The day in four hours

Rendered for Lisbon on 21 June: sunrise 06:11, sunset 21:04. Fictional building, sample data.

GNÓMON at 07:45, low morning sun on the east corner. Rendering of a fictional building.
07:45Sun on the east faceLow sun from the east-north-east lights the east corner first. The river façade is still in shade.
GNÓMON at 13:38, high midday sun over the river façade. Rendering of a fictional building.
13:38Highest sun74.7° at 13:38. The glass sits in the balconies’ shade; the terraces take the light.
GNÓMON at 20:25, evening sky and the first lit windows. Rendering of a fictional building.
20:25The evening sideThe sun is 6° high in the north-west. The west corner and the terraces keep it until sunset at 21:04.
GNÓMON at 22:00, night, with lit windows across the façade. Rendering of a fictional building.
22:00NightWindows light up. Choose the light you want to live with.

Four plans, each drawn around its light.

Every residence faces the river. What changes is when the sun comes in. Move the hour on each plan to see where it lands on 21 June.

  • 20 T2 river side All day
  • 5 T3 east corner Morning
  • 5 T3 west corner Evening
  • 2 Penthouses Terrace

Sample data. Light is computed from window geometry and the sun position for Lisbon on 21 June; balconies above, terrain and neighbouring buildings are not modelled.

1 of 4All day

T2River side

Every room faces the river. The south glass is in direct sun from 09:49 to 17:27: steady, even light through the working day.

Interior
68 m²
Bedrooms
2
Bathrooms
1
Outdoor
Balcony, 15 m²
Position
Floors 1–5
Residences
20

Direct sun on 21 June7 h 38 min09:49–17:27

From €565,000Sample price

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2 of 4Morning

T3East corner

Breakfast in full sun. The east glass takes the light from sunrise; after 09:49 it moves round to the south rooms.

Interior
112 m²
Bedrooms
3
Bathrooms
2
Outdoor
Balcony, 14 m²
Position
Floors 1–5
Residences
5

Direct sun on 21 June11 h 16 min06:11–17:27

From €940,000Sample price

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3 of 4Evening

T3West corner

The late light. The south rooms take the sun from 09:49, and the west glass keeps it until sunset at 21:04.

Interior
112 m²
Bedrooms
3
Bathrooms
2
Outdoor
Balcony, 14 m²
Position
Floors 1–5
Residences
5

Direct sun on 21 June11 h 15 min09:49–21:04

From €955,000Sample price

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4 of 4Terrace

PenthouseFloor 6, with terrace

Glass on three sides and a south terrace. Sun from sunrise to sunset; the outer edge of the terrace has it from 08:07 to 19:09.

Interior
227 m²
Bedrooms
2 + study
Bathrooms
2
Outdoor
Terrace, 43 m²
Position
Floor 6
Residences
2

Direct sun on 21 June14 h 53 min06:11–21:04

From €2,450,000Sample price. Plan shows 6B; 6A is its mirror image.

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On the hill, close to the water.

A quiet street on the slope above the Tagus. The tram, the market and the river are a short walk away, and every residence looks south across the water.

  1. 1Tram stop2 min
  2. 2Bakery and café3 min
  3. 3Viewpoint6 min
  4. 4Covered market8 min
  5. 5Riverside promenade9 min
  6. 6Metro station11 min
  7. 7Ferry pier13 min
  8. 8International school15 min

Walking times are sample data. The map is stylised and fictional, not to scale.

Specification and payments

Three payments, tied to three moments. The building is designed to keep the light, and the heat, where you want them.

  1. 10%

    Reservation

    On signing the reservation agreement. The residence is taken off the market.

  2. 20%

    Promissory contract

    Within 30 days, on signing the promissory contract of sale (CPCV).

  3. 70%

    Completion

    On the deed, at handover. Planned for the last quarter of 2028.

Sample terms, not an offer.

Structure

  • Reinforced concrete frame and flat slabs
  • Designed to the Eurocode 8 seismic standard
  • Ceilings 2.8 m, 3.0 m on floor 6

Façade

  • Lime render over external insulation
  • Deep south balconies as horizontal shade
  • Vertical fins on the east and west corners

Windows

  • Thermally broken aluminium frames
  • Low-e glass, floor to ceiling on the south
  • External blinds on east and west glass

Energy

  • Heat pumps for heating, cooling and hot water
  • Solar panels on the roof for shared areas
  • Target energy class A, certified at completion

Interiors

  • Limestone floors in living areas, oak in bedrooms
  • Stone worktops and integrated appliances
  • Full-height doors throughout

Building

  • Two lifts and a daylit staircase
  • Parking for every T3 and penthouse, EV ready
  • Bike room and a storage room per residence

Sample specification for a fictional building.

See it at the hour you would live in it.

On site in Lisbon or by video call. Tell us which light you want, and we book the viewing for the hour it is at its best.

Gnómon is a fictional project. This form does not send anything.

Light
Viewing

Demo – no submission.

Questions

Handover is planned for the last quarter of 2028. The date is sample data for this concept.

10% on reservation, 20% on the promissory contract within 30 days, and 70% on the deed at handover. Sample terms, not an offer.

The design targets energy class A. The certificate is issued at completion. Sample data.

Each T3 has one space and each penthouse two. Spaces for T2 residences can be requested. Every space is ready for EV charging.

Yes. Viewings run at the sales gallery on site, by appointment, or by video call. We book them at the hour of the light you choose.

Sun positions are computed for Lisbon (38.72° N, 9.14° W) on 21 June, local time UTC+1, with the NOAA solar equations. Terrain, neighbouring buildings and balconies above are not modelled, so the real light will differ.