Why Site Planning / (Site Plans) is Very Important in House Designing?

Site planning is a design tool used to determine an appropriate development outcome, based on an analysis of the development site's constraints

Kedalla Design and Construction (pvt) Ltd

No:247 1/3
Peradeniya Road, Kandy (20000)
Sri Lanka

What are Site Plans?

A site plan is a scale drawing that shows the full extent of the site for an existing or proposed development. Site plans, along with location plans, may be necessary for planning applications/plan Approvals (zoning and other regulations ). In most cases, site plans will be drawn up following a series of desk studies and site investigations.

The site is crucial when it comes to the design of a house or a building. That's why a lot of time, thought and money go into conducting a site analysis before the conceptual phase of design has even begun. The elements of your site such as topography, vegetation, infrastructure, weather, natural light, site utilities, drainage, access, soils, culture and even existing buildings and local policies/building regulations all influence the final design of a building. Site plans are also used by homeowners to plan home improvement projects such as a new pool, garage or deck.

Site plans are also an important part marketing real estate properties to show the complete property, including key outdoor features. Site plans give potential homebuyers an idea of the size, scale, and orientation of the property, better than photos do.

The first step in creating house plot plans/site plan (which will act as a guide during your home design process) is to get to know the land really well.

We bring along a notebook and while on your land, make notes to answer the following questions.

Note that at this point in your design process it is not necessary for your drawings to be to scale.

  • Where do the local sounds come from?
  • Are they pleasant or unpleasant?
  • Do they vary throughout the day or from weekday to weekend?
  • What directions do the winds come from?
  • Do they shift throughout the day?
  • Do they differ from one part of the land to another?
  • Where does the sun rise?
  • Where does it set?
  • Where are the shady areas?
  • Where are the sunniest spots?
  • Where are the best views?
  • Are there directions in which you would prefer to not have a view?
  • Any existing services - water, electricity, sewage. If the services are not yet in, find out from your local municipal office and utility companies where water, sewage, electricity services will come to the property line. If you will need to put in a well or septic tank and field, find out what options you have for their locations.
  • Any water features—creeks, ponds, wet areas
  • Any high or low spots.
  • All existing trees, plants or shrubs.
  • Existing buildings.
  • Roads.
  • Property lines / Building Lines
  • Street Lines

Once we've conducted a thorough site analysis, we will present your concept with a site plan showing existing as well as proposed conditions.

Typically, depending on the size of the project, site plans are likely to be at a scale of 1 : 1000 or 1 : 500. However, for very small projects, larger scales may be used, and for large projects smaller scales, or even several drawings, perhaps pulled together on one very small scale plan.

Types of Site Plans

There are two types of site plans that helpful for house designing, real estate, landscape design, and home improvement projects:

2D Site Plans

A 2D Site Plan gives you a clear overview of the layout of your property. They can be simple black and white diagrams or color-coded to show different landscape features such as green areas, new proposed buildings, parking lots or paved areas etc....

3D Site Plans

A 3D Site Plan is a full-colored 3D rendering of your landscape layout. 3D Site Plans make easy to understand and visualize what the landscape actually looks like including details such as structures, swimming pool, materials, plantings, etc....

The most important things to consider when site planning

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Including the property lines / Building lines

Including the property line of your site is one of the most important elements in your site plan. In a way, it sets the stage for your design. You can have the most innovative or beautiful house plan/building plan, but you don’t want to encroach on an adjacent owner’s property. If you do, you’ll likely be in for extra time conducting more surveys, more drawings and possibly even lawsuits depending on how nice your neighbor is.

Existing Buildings and proposed conditions

For planning committee and plan reviewers to grasp the full scope of your design, you'll want to present both existing and proposed conditions(buildings, parapet walls, retaining walls etc..). This shows how your design will affect the site and maybe even how the site impacts your design. It also lets you know if other officials such as technical officers need to be present throughout the construction of your concept.

Distance between buildings and property lines / Building Lines

Understanding your site goes beyond knowing what happens within your property line. Surrounding infrastructure and buildings play an important role in shaping your design. Issues like building height, zoning, building usage and even fire hazards are all determined by what goes on around your site. So we make sure to include those dimensions in your plan.

Parking facilities / Parking bays / Access

Parking is a huge issue when it comes to planning a site, especially in a commercial setting or even a dense urban environment. Not only is parking at a premium in these areas, but a lot of time, thought and research goes into determining the adequate amount of parking. So we make sure to include parking diagrams equipped with dimensions, the flow of traffic, signage and even handicapped accessibility in your site plan.

Access is the next thing to consider in site planning. We forget how the size of cars, roads, driveways and garages relates to a house. Even the most compact car needs adequate turning and parking space. Access roads leading up or down hills need careful study. There needs to be a level place to stop where the road meets the street. Finally, don’t block access to the back or side yards without thinking through the consequences carefully—particularly if you plan to landscape or there is room to build on an addition in the future.

Driveways / walkways

There are many code requirements governing the design of access onto your site from the driveway width to curb cut dimensions.

Ground sign locations

We want to tell the whole story of your site. So when we draw your streets, include things like stop signs, highways signs, etc. We'll even want to include traffic lights, too.

Landscaped areas / Gardens / Pools or Water

Landscaping is not only there for aesthetics but often times it's part of a fragile ecosystem that must be preserved. Bulldozing all the trees and starting over may seem like a quick fix but often times is not ideal, especially in this day and age of sustainability and reducing site impact. So we make sure to include existing and proposed landscaping improvements in your site plans.


We include easements in your site plan. There are many types of easements out there like right-of-ways, easements of support and even utility easements. We can show these graphically or with text. Using both is ideal; this way there's no question what easements exist on your site.

Surrounding streets

Understanding how traffic flows through and around your site is crucial. Showing the surrounding streets whether they're main arteries, avenues or dead ends will help illustrate the impact your design traffic loads around your site. It also provides context for your building. Often times the people reviewing your plans are familiar with the area they live and adding street names makes it easier for them to understand your design and if it's something that's appropriate for that particular area.

Soils, Ledge and Drainage

As part of the research involved in designing a septic system, a civil engineer can usually define the soil and drainage on a particular site. In most cases, a house is sited based on other considerations; then the foundation and drains are designed to cope with the local soil and water conditions.

Sometimes ledge, unsuitable soil or excess water can render the chosen house location unworkable. Although the average civil engineer can handle most cases, the advice of a geotechnical engineer or soils specialist may be needed if problems arise.

Don’t attempt the impossible—such as trying to keep the water out of a basement located below the water table. While waterproofing (as opposed to the typical “dampproofing”) is commonly is used in underground commercial structures, such techniques are costly and difficult to do right.

Trees and Plants / Existing vegetation

Existing trees and plants on a site should be assessed for their value to the site including to provide shade, wind shelter, soil stability and a habitat for birds.

If possible, design and locate the building to accommodate established trees and plants that are not easily transplanted.

Many people have trouble sorting out the value of existing plants and trees. Early in the project, get a professional opinion — or two — from someone familiar with local flora, climate and plant diseases. Find out which plants are valuable and worth keeping and which can be dispensed with.

Wind Considerations

Wind is another important factor in site planning. Wind direction, speed and frequency will influence the building design including bracing requirements, roof and wall cladding selection, weathertightness detailing, building entry locations, window size and placement and provision of shelter for outdoor spaces.

In remote locations, wind speed and frequency may also be a factor in selecting wind as a power generation source.

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Do not settle on a house design until you have settled on a site design

A site plan is an architectural plan, landscape architecture document, and a detailed engineering drawing of proposed improvements to a given lot.

We love our clients. Our clients love us. Checkout what our happy clients have to say,

A site plan also known as a plot plan

"Kedalla is an ideal place for house planning in Kandy area. They are expert in that field. Creative and reliable. Explained all the facts in friendly manner and everything is fair. Trusted service. You planned our future shelter the best. We wish you all the best. Welldone "Kedalla"

Mr.A Edirisinghe

Deputy Principal

Vidyartha College, Kandy