Free DIY Tool · 3D

Sun Path & Shadow Simulator

Set your house size, floors and which way it faces, then move through the day and the year. The sun is placed by real solar geometry for Faridabad, Delhi, Gurugram or Noida, so you can see which walls heat up, where shadows fall and how a neighbour shades your plot.

Start designing Get it designed by Panache

Loading 3D…

Drag to orbit · Use the Time slider or Play the day

Design my house for the sun

A design aid. Sun positions use standard solar formulas for the chosen latitude and longitude in IST and ignore terrain, trees and haze. Massing and shadows are simplified. Vastu and climate tips are general guidance, not a site-specific study.

How it works

Study the sun in five easy steps

1Pick your city
Faridabad, Delhi, Gurugram, Noida, or enter a custom latitude.
2Shape the house
Set width, depth, floors and the direction the front faces. The red arrow marks north.
3Choose a date
Use the solstice and equinox buttons or slide through the year.
4Move the time
Drag the time slider or press Play to watch the shadows sweep across the plot.
5Plan around it
Read which facades get sun and for how long, then ask Panache to design for it.

Good to know

Designing with the sun in NCR

The sun moves a lot through the year

At about 28.5° N, the noon sun in late June is around 85° high, almost overhead, and the day is about 14 hours long. In late December it is only about 38° high and the day is close to 10 hours 20 minutes. That swing is why the same window can be pleasant in winter and unbearable in May.

West is the wall to protect

In NCR the worst heat comes from the afternoon sun on the west and south-west walls, after the air has heated all day. Use fewer, smaller west windows with vertical fins or jaalis, insulate the roof, and plant trees on the west side of the plot where possible.

Chhajjas for south, fins for east and west

A horizontal shade 1.5–2 ft deep over a south window blocks the high summer sun but lets the low winter sun in. Low morning and evening sun on east and west windows is hard to stop with a chhajja, so vertical fins, deep reveals or louvres work better there.

Like what you see?

A house that stays cool and bright

Send us your plot details. Our architects will study the orientation, plan rooms and openings around the sun and wind, and size chhajjas and shading for NCR summers and winters. No obligation.

Panache ArchitectHouse design, elevations, approvals and construction across Delhi NCR Panache InteriorsHome interiors — living rooms, bedrooms, modular kitchens, wardrobes, full homes Panache Design StudioCommercial interiors — cafés, restaurants, salons, gyms, showrooms and offices

FAQs

Common questions

Try our other free tools, or explore Panache Interiors and Panache Design Studio.

Talk to a designer

How accurate is the sun position?

The tool uses standard solar formulas: the sun’s declination and the equation of time for the date, the hour angle from Indian Standard Time and your longitude, then altitude and azimuth. Sunrise and sunset include atmospheric refraction. Results are usually within a minute or two and a fraction of a degree, which is plenty for design decisions.

Which facing is best for a house in Delhi NCR?

North and east facing plots are popular because the front and main openings get gentle light and less heat, and they suit Vastu. South and west facing plots work well too if the design shades those faces with deep balconies, chhajjas and buffer rooms. Good design matters more than the facing itself.

Does a north-facing house get any direct sun?

Yes. Between April and August the sun rises north of east and sets north of west, so a north facade gets low sun for a short time in the early morning and late evening. In winter it gets none. Check this with the 21 June path and the direct sun hours in the results.

Will my neighbour’s building block my sunlight?

Add a neighbour on the south side and pick 21 December. The winter sun is low in the south, so a tall building close to the south can shade your ground floor for most of the day. On the east or west it mostly affects the morning or evening. Change the gap and floors to see the effect.

How can I use this for solar panels?

Rooftop panels in NCR should face south, tilted at about 25–28°. Use the tool to check that water tanks, stair rooms, parapets or a taller neighbour do not shade the roof between about 9 am and 4 pm, especially in winter when shadows are longest. Panache can plan the roof layout with this in mind.

What does Vastu say about sun and orientation?

Vastu generally favours an entrance and openings in the north and east, the puja room in the north-east, the kitchen in the south-east and heavier rooms in the south-west. In NCR’s climate this broadly matches good sun design, as it keeps the hot south and west sides more closed. Our team can balance both in your plan.

Try it in 3D — freeAll free 3D tools →

3D Floor Plan BuilderLay out bedrooms, kitchen, toilets and stairs on your plot and see the plan in 3D, with areas and coverage.Plot, Setback & FAR VisualizerSee your plot’s setbacks, buildable envelope and the floors you can build under FAR, in 3D.3D Landscape & Garden DesignerDesign your lawn or terrace garden in 3D — trees, paths, deck, pergola, water feature and night lights.3D Farmhouse PlannerPlan a 1–5 acre farmhouse in 3D: house, pool, lawn, driveway, orchard and gate. Drag to arrange, see coverage and cost.