Building a city drainage system that guarantees protection against flooding requires participation from property owners and the City of Edmonton. Many homes and commercial areas were built prior to the development in 1993 of city-wide surface drainage plans and procedures.

Homeowners need to look at their own lot grading, and take the necessary steps to prevent flooding and property damage. They should also try to avoid any disputes with neighbours over lot grading and surface drainage issues.

I had my grading approved, and the neighbour's construction/grading damaged mine. Who is responsible for fixing it?

When a City of Edmonton Lot Grading Inspector completes a rough or final grade inspection and issues an approval, it verifies that at the time of inspection the property was in compliance with the  Drainage Bylaw .

From that moment on, as the property owner, it is your obligation to maintain the lot grading permanently regardless of natural settlement or activity caused by yourself or damage by a 3rd party. This is considered a civil matter that falls outside the authority of the Drainage Bylaw for which the City of Edmonton is unable to mediate or enforce.

I have a problem with my neighbour's downspout and/or sump pump discharging on my property causing flooding on my yard and/or my basement.

Examine your own grading and be prepared to make changes to ensure that your foundation grading will direct surface drainage away from your house. Evaluate the existing drainage pattern and discharge locations with your neighbour to determine the best point of discharge for downspouts or sump discharge hoses. Discharge points must not be less than 15 centimetres from the property line.

A  swale is a shallow, sloped channel that conveys water from the buildings towards the street or lane. Lot grading between the houses has to be maintained for a positive and consistent slope along drainage swale.

All property owners are responsible to grade their lots properly to allow lot grading / surface drainage away from buildings and towards the public right-of-way.

My neighbour had his downspout (roof drain) connected to a service inside the house, but now it is disconnected and it drains on to my property.

Many houses in older areas have the downspouts connected to the storm sewer system inside the house. Basement flooding may occur during heavy rainstorms when the storm sewer system is flowing at peak capacity, causing the sewer back-up.

Disconnecting the downspouts from the storm system allows the roof drainage to flow onto the ground before reaching the catchbasin in the street. The City of Edmonton supports this disconnection if lot grading / surface drainage does not impact adjacent property or environmentally sensitive locations. In many cases, improvement of the existing lot grading is required to ensure the compliance with the Drainage Bylaw.

Examine your own grading and be prepared to make changes to ensure that your foundation grading will direct surface drainage away from your house. Evaluate the existing drainage pattern and discharge locations with your neighbour to determine the best point of discharge for the downspouts. Discharge points must be at least 15 centimetres away from the property line.

A swale is a shallow, sloped channel that conveys water from the buildings towards the street or lane. Lot grading between the houses has to be maintained for a positive and consistent slope along drainage swale. A shared swale on the common property line is the ideal case. However, a separate (internal) swale within the lot is sometimes required to solve a lot grading problem.

I live in a mature (older) neighbourhood and my neighbour has built a new house. It is higher in elevation compared to mine, and other neighbours.

There is no surface drainage design for properties developed prior to 1989. However, the Alberta Building Code and the Drainage Bylaw provide requirements for all houses to have a 10% slope away from the foundation walls.

In the case of infill housing, the owner must submit a Lot Grading Plan to the City of Edmonton for review and approval prior to the Development and Building Permit being issued. 

Residential Infill

After construction and lot grading is completed the owner must submit a Lot Grading Certificate for to the City of Edmonton followed by a lot grading inspection  to ensure compliance under provisions of the Drainage Bylaw and the lot grading guidelines.

To avoid surface drainage problems, you should:

  • Review and repair your foundation grading to re-establish the slope away from your house
  • Ensure that you have downspout extensions or splash pads to convey surface water at least 2 metres away from the house and at least 15 centimetres away from adjacent property
  • Consult with the adjacent property owner to create a drainage plan that works for both properties
  • Check lot grading between the houses to make sure a positive and consistent slope along the drainage swale has been maintained

For Investigations and Enforcement of the Drainage Bylaw you must contact the City of Edmonton at 311.

My neighbour re-landscaped / re-graded his lot higher than mine and now my basement will get flooded.

If your neighbour has re-landscaped his foundation grading to provide the required slope of 10% away from his house without changing the existing grade at the property line, then you should examine your own lot grading and be prepared to make changes to ensure that your foundation grading is sloped away from your house. If you have poor or negative grade, surface water will flow towards your foundation wall and increase the risk of basement flooding. Evaluate the existing drainage patterns and discuss with your neighbour to overcome common drainage issues.

If the re-grading has resulted in directing surface drainage from the neighbour’s roof or foundation directly onto your property, there may be a bylaw violation.

Call 311 or email: lot.grading@edmonton.ca to contact a City of Edmonton lot grading inspector.

I want to do re-landscaping on my lot. Can the City of Edmonton tell me if there is anything I should be aware of, as I proceed?

The City of Edmonton recommends maintaining positive slope from your foundation walls and paying close attention to how your stormwater is managed and directed.

You may want to call 311 and request to speak with a City of Edmonton Lot Grading Inspector. When provided with your address we can guide you with the appropriate requirements and make you aware of any specific designs that must be maintained. The owner is responsible to establish and maintain lot grading under provisions of the Drainage Bylaw.

My neighbour has poor grading around his home. Should I be concerned about that when I’m fixing my foundation grading?

Ask your neighbour to consider repairing his foundation grading in concern with your re-grading efforts. The combined foundation grading of both houses will form a common property swale that will convey damaging surface drainage away from both buildings. Grading changes to only one house will likely direct surface drainage towards the adjacent building. This is not permitted.

When working independently, you must ensure that lot grading from the slope that you create away from your house is directed to drain towards a City of Edmonton right-of-way. You may need to construct an internal swale to achieve this requirement.

I want to re-landscape my lot. Do I need a permit or Lot Grading Approval?

There is no permit requirement for re-grading that does not alter an existing drainage pattern. Your re-landscaping efforts must ensure that any grade changes will serve to direct surface drainage towards a public right-of-way (usually a street or a lane) without draining onto an adjacent private property. However, if there is an approved Lot Grading Plan for the area and alterations result in a complaint to the City of Edmonton, a re-application for Final Lot Grading Approval may be required. The owner is responsible to establish and maintain lot grading under provisions of the Drainage Bylaw.

My neighbour built a sidewalk that is at a higher elevation and the water runs into my yard.

Effective side-lot drainage requires the cooperation of both property owners. Check your own lot grading. All property owners are responsible to have the lot graded to direct surface water away from buildings and towards the public right-of-way. Lot grading changes that promote the flow of surface drainage from the roof or the foundation directly onto adjacent private property may be a bylaw violation. Consult with your neighbour over common drainage issues.

Call 311 or email lot.grading@edmonton.ca to contact a City of Edmonton lot grading inspector.

I am buying a property in Edmonton. How do I find out if there are any outstanding lot grading approvals that I should be aware of?

You can check the status of lot grading online at Lot Grading Self-Serve.

As the purchaser or acting agent of the purchaser (such as a lawyer or realtor) you must submit a Freedom of Information and Protection of Privacy Act (FOIP) request to obtain this information. Application processing takes approximately 30 business days.

I am selling a property in Edmonton and I would like to know if there are any outstanding lot grading approvals that I should be aware of?

You can check the status of lot grading online at Lot Grading Self-Serve.

When selling a property, it is the owner’s responsibility to ensure that lot grading meets approval and is in compliance with the Drainage Bylaw. As the property owner or an agent, such as a lawyer, builder or developer working on behalf of the owner, you can obtain lot grading documents through a City of Edmonton search of records request.

I have a commercial business and during heavy rainstorms my parking lot floods around the catchbasin.

All new commercial and multi-family properties have on-site stormwater management. The parking lot is designed to store rain water on the surface, which will slowly drain into the storm system through a flow restrictor in the catch basin. This is intended to prevent surcharging the sewer mains. All commercial and multi-family properties must contain surface runoff within the private property. Refer to lot grading guidelines for more information.

Where can I direct concerns about the height and grade of the new building constructed next to my property in an industrial area?

All new commercial and multi-family properties are required to have a Lot Grading Plan (reviewed and approved by the City of Edmonton) and on-site servicing (reviewed and approved by EPCOR Water Services Inc.) indicating the proposed on-site drainage.  The applicant / owner / builder of the new development must control and establish the site grading, and stormwater management in accordance with the lot grading plan and lot grading guidelines. Retaining walls may be needed to achieve this.

Adjustments to the site grading may be required to provide a better level of protection for existing buildings from rainfall and snow melt. 

For more information refer to Commercial and Multi-Family Lot Grading or call 311.

I want to know if Rough or Final Grade Approval was issued on a property. How do I check the status and obtain the documentation?

If you are the registered property owner or an agent working on behalf of the owner, we can provide that information from the City of Edmonton search of records.  For other individuals seeking lot grading information you must request this under the provisions of the Freedom of Information and Protection of Privacy Act (FOIP). Application processing takes approximately 10 (ten) working days for Search of Records and up to 30 working days for FOIP requests. Applicable Fee is required per Titled Lot Search.

What can I do about flooding (surface runoff) in my condominium unit?

Maintaining the site grading is the responsibility of the condominium association. If the project was built after 1993, there should have been an approved lot grading plan. This plan can serve as the basis for solving surface runoff issues. 
Problems in projects constructed before 1993 can be solved by providing a positive slope away from the buildings. Contact your Condo Board or Management company to address concerns on your property. 
 

What can I do if I am concerned that my neighbour's new house (infill) is higher than mine and might cause flooding of my property?

There is no detailed Lot Grading Plan design for properties developed prior to 1989. However, the lot grading guidelines, Alberta Building Code and the Drainage Bylaw provide requirements for all houses to have a 10% slope away from the foundation walls.

Since 2005, new infill properties have been required to go through a lot grading inspection to ensure compliance with the lot grading guidelines. Since October 2015, a detailed lot grading plan is required for all new infill housing. 

Infill developments are required to contain their surface flows to the property line. This is usually achieved by retaining walls or working with neighbours to create a shared drainage swale at the property line.    
 
To avoid surface runoff issues onto your property, the City recommends you:

  • Review and repair your foundation grading to re-establish the required 10% slope away from your house
  • Ensure that you have downspout extensions or splash pads to convey surface water at least 2 metres away from the house and at least 15 centimetres away from adjacent property
  • Consult with the adjacent property owner to create a lot grading design that works for both properties
  • Check lot grading between the houses to make sure a positive and consistent slope along the drainage swale has been maintained

For Investigations and Enforcement of the Drainage Bylaw please refer to lot grading issues for more information.

For more information on City of Edmonton Infill please refer to the following:
City of Edmonton Infill
Residential Infill Guidelines 

How do I file a complaint about water from the alley/lane behind my house not draining properly, causing flooding in my backyard and driveway?

Public property issues are inspected and enforced by the City through road and sidewalk maintenance.