Septic System Permits in Nova Scotia

If you are building in Nova Scotia outside of a municipally serviced area, you will almost certainly need a septic system permit. On-site sewage disposal is a reality for a large portion of the province, including most rural communities, many suburban developments, and even some properties within municipal boundaries that are not connected to central sewer. Understanding the septic permit process is essential because it directly affects whether and how you can build on your property.

When You Need a Septic Permit

In Nova Scotia, a septic system permit (formally called an On-Site Sewage Disposal System Permit) is required in any of the following situations:

• New construction: Any new building that generates wastewater and is not connected to a municipal sewer system requires a septic permit. This includes single-family homes, duplexes, garden suites, and accessory buildings with plumbing.
• System replacement: If an existing septic system has failed or is being replaced, a new permit is required for the replacement system.
• System upgrade or expansion: Adding bedrooms to a home, converting a space to include plumbing, or any change that increases the wastewater load on the system typically requires a new or amended septic permit.
• Property subdivision: When land is being subdivided, each new lot that will not connect to municipal sewer must demonstrate that it can support an on-site sewage disposal system. This usually requires soil testing and a septic system design before the subdivision can be approved.

It is important to note that the septic permit is entirely separate from the building permit. You need both, and they are issued by different authorities. The building permit is issued by the municipal building department. The septic permit is issued by the Nova Scotia Department of Environment and Climate Change (formerly known as Nova Scotia Environment).

Nova Scotia Environment Department Oversight

The Province of Nova Scotia, through the Department of Environment and Climate Change, has exclusive jurisdiction over on-site sewage disposal systems. This means that regardless of which municipality your property is in, the septic permit process is governed by provincial regulations, specifically the On-Site Sewage Disposal Systems Regulations made under the Environment Act.

Provincial inspectors review septic applications, conduct site assessments, and issue the permits. The department also maintains a registry of qualified persons (QPs) who are authorized to design and install septic systems in the province. Only a qualified person can design your system and submit the application on your behalf.

There are regional offices of the Department of Environment and Climate Change across Nova Scotia. Your application will be processed by the regional office closest to your property. Processing times vary but generally range from two to six weeks, depending on the time of year and the complexity of the application.

Types of Septic Systems

Nova Scotia's regulations recognize several types of on-site sewage disposal systems. The type of system your property requires depends on the soil conditions, lot size, topography, and proximity to water features. The most common types include:

Conventional Septic System

A conventional system consists of a septic tank and a disposal field (also called a leaching bed or drain field). Wastewater flows from the house into the septic tank, where solids settle and are partially decomposed by bacteria. The liquid effluent then flows into a network of perforated pipes in a gravel-filled trench, where it percolates through the soil for final treatment. Conventional systems are the simplest and least expensive option but require suitable soil conditions, specifically well-drained soil with adequate depth to the water table and bedrock.

Raised Bed System

When the natural soil does not have adequate depth or drainage for a conventional system, a raised bed (or mound) system may be used. This system works on the same principle as a conventional system but builds the disposal field above the natural ground surface using imported fill material. Raised bed systems are common in Nova Scotia due to the prevalence of shallow bedrock and clay soils in many areas of the province. They are more expensive than conventional systems due to the additional fill material and grading required.

Advanced Treatment Systems

For properties with challenging site conditions, limited lot area, or proximity to sensitive watercourses, an advanced treatment system may be required. These systems add a secondary or tertiary treatment step before the effluent reaches the disposal field, producing a higher quality effluent that requires less soil treatment. Common advanced treatment technologies approved for use in Nova Scotia include textile filter systems, aerobic treatment units, and constructed wetland systems. Advanced treatment systems have higher upfront costs and ongoing maintenance requirements but allow development on sites that cannot accommodate conventional or raised bed systems.

Holding Tanks

In rare cases where no soil-based disposal system is feasible, a holding tank may be permitted. A holding tank simply stores wastewater until it is pumped out and transported to a treatment facility. Holding tanks are considered a last resort because of the ongoing cost and inconvenience of regular pump-outs. They are most commonly used for seasonal properties or as a temporary measure.

Soil Testing and Site Evaluation

Before a septic system can be designed, a qualified person must conduct a thorough site evaluation, which includes soil testing. The soil evaluation is the single most important factor in determining what type of system your property can support and where on the lot it can be located.

The site evaluation process typically involves:

• Test pits: The qualified person excavates test pits (typically two or more) to examine the soil profile. They assess the depth of topsoil, the type and permeability of the subsoil, the depth to bedrock, and the depth to the seasonal high water table. Test pits must be dug during appropriate conditions, as frozen ground or saturated soil can affect the results.
• Percolation tests: In some cases, percolation (perc) tests are conducted to measure how quickly water drains through the soil. The perc rate directly determines the required size of the disposal field.
• Site measurements: The qualified person maps the property, noting setback distances from property lines, wells, watercourses, buildings, and other features. Septic system components must meet minimum separation distances from these features as specified in the regulations.
• Topographic assessment: The slope of the property is evaluated, as excessive slope can affect the performance of the disposal field and may require special design considerations.

Tip: If you are purchasing vacant land with the intention of building, it is strongly recommended to have soil testing done before you finalize the purchase. Discovering that a lot cannot support a septic system after you have already bought it can be an expensive problem. Making the purchase conditional on satisfactory soil testing is a prudent approach.

The Permit Application Process

The septic system permit application process in Nova Scotia follows a defined sequence:

1. Hire a qualified person: You must engage a Nova Scotia qualified person (QP) to conduct the site evaluation, design the system, and prepare the permit application. The QP is responsible for ensuring the system design meets all regulatory requirements. You can find a list of qualified persons through the Nova Scotia Department of Environment and Climate Change.
2. Site evaluation: The QP conducts the soil testing and site evaluation as described above. This typically costs between $500 and $1,500 depending on the complexity of the site.
3. System design: Based on the site evaluation results, the QP designs the septic system, selecting the appropriate type and sizing it based on the expected wastewater flow (determined by the number of bedrooms in the proposed home). The design is documented on a standard application form.
4. Application submission: The QP submits the completed application to the regional office of the Department of Environment and Climate Change. The application includes the site evaluation data, system design, site plan, and the application fee.
5. Provincial review: A provincial inspector reviews the application. They may request additional information or conduct a site visit. If the application meets all requirements, the inspector issues the septic system permit.
6. Installation: The septic system must be installed by a qualified person or under their supervision, in accordance with the approved design. The QP must inspect the installation before the system is backfilled and covered.
7. Final inspection: A provincial inspector may conduct a final inspection of the installed system before it is put into service.

Costs for Septic Systems in Nova Scotia

The total cost of a septic system in Nova Scotia varies significantly depending on the type of system, site conditions, and the size of the home. Here is a general overview of typical costs:

Cost Component	Typical Range
Site evaluation and soil testing	$500 – $1,500
System design and permit application	$500 – $1,000
Provincial permit fee	$150 – $300
Conventional system installation	$10,000 – $18,000
Raised bed system installation	$15,000 – $25,000
Advanced treatment system installation	$25,000 – $40,000+

These figures are approximate and can vary based on current material costs, site accessibility, and the specific conditions of your property. It is advisable to obtain multiple quotes from qualified persons and installers before committing to a system.

Connecting Septic Requirements to Building Permits

Although the septic permit and building permit are separate approvals issued by different authorities, they are closely related. In practice, your building permit application will often require evidence that septic approval has been obtained or is in progress. Many municipal building departments will not issue a building permit for new construction until a valid septic permit is in place.

The connection goes both ways. Your septic system design is based on the number of bedrooms in the proposed home, which is determined by the building plans submitted with your building permit. If you change the number of bedrooms after the septic permit is issued, you may need to amend the septic permit as well.

Additionally, the location of the septic system on the lot can affect the placement of the building. Septic tanks and disposal fields have setback requirements from the building foundation, well, property lines, and watercourses. In some cases, the septic system requirements may constrain where the house can be placed on the lot, which is another reason to begin the septic evaluation process early in your project planning.

How Nova Scotia Permit Coordinates with Septic Requirements

At Nova Scotia Permit, we understand that the septic permit is one of the most critical early-stage requirements for rural and suburban construction projects. Our integrated permit service takes the septic process into account from the very beginning of your project.

When you work with us, we:

• Identify early in the process whether your property requires a septic system and flag this as a critical path item in your project timeline.
• Coordinate the timing of your septic application with your building permit application to avoid delays. Since the septic permit can take several weeks, we ensure the process begins early enough to keep your project on schedule.
• Review the septic system design in the context of your building plans to ensure that the house placement, lot grading, and site plan work for both the building permit and the septic permit.
• Track the status of your septic application alongside your building permit, providing you with a single point of contact for both processes.

Frequently Asked Questions

Can I add a secondary suite or garden suite to my existing septic system?

Adding a secondary suite or garden suite increases the wastewater load on your septic system because the number of bedrooms effectively increases. In most cases, you will need the existing system evaluated by a qualified person to determine whether it has the capacity to handle the additional flow. If the existing system is undersized, you may need to upgrade or replace it, which requires a new septic permit. The Department of Environment and Climate Change treats additional dwelling units as additional bedrooms for the purpose of system sizing, so this evaluation should happen early in your project planning.

How long does a septic permit take to obtain in Nova Scotia?

From the time a complete application is submitted to the Department of Environment and Climate Change, processing typically takes two to six weeks. However, the total timeline from your initial decision to build can be longer when you factor in scheduling the soil testing (which should be done when the ground is not frozen), waiting for the qualified person to complete the design, and any revisions requested by the provincial reviewer. During the busy spring and summer construction season, processing times may be on the longer end. Starting the septic process in late winter or early spring for a summer construction start is advisable.

What happens if my soil fails the septic test?

If the soil evaluation reveals that conventional septic system disposal is not feasible, it does not necessarily mean you cannot build on the property. A qualified person will explore alternative system types, such as a raised bed system or an advanced treatment system, that can work with challenging soil conditions. In rare cases where no system type is feasible due to extremely poor soil, high water table, proximity to sensitive water features, or inadequate lot size, the property may not be suitable for development with on-site sewage disposal. This is why soil testing before purchasing vacant land is so important. If you are already the owner, consulting with multiple qualified persons is recommended, as different designers may have different solutions for difficult sites.