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Septic System Design Professional: Vancouver Island Guide
Table of Contents
- What a Septic System Design Professional Does
- Understanding the Authorized Person Role in BC Septic Projects
- Site Investigation and Assessment for Your Onsite Sewage System
- Navigating Onsite Sewage System Filing in BC
- What to Expect: From Design to Letter of Certification
- The right professional depends on the work your property needs.
- In BC, an Authorized Person may be a ROWP or another professional who meets the requirements of the Sewerage System Regulation. Ask who will be responsible for the technical work and what their role covers.
- Frequently Asked Questions
Last Updated: October 11, 2026
What a Septic System Design Professional Does
A septic system design professional assesses the property and prepares plans for an onsite sewage system. In BC, an Authorized Person may be a ROWP or another qualified professional. The right person and process depend on the project and the property.
Understanding the Authorized Person Role in BC Septic Projects
In BC, an Authorized Person is a Registered Onsite Wastewater Practitioner (ROWP) or a qualified professional. Where section 8 of the Sewerage System Regulation applies, the Authorized Person files the required information and plans with the health authority before construction. A filing is not the same as health-authority approval.
TTIS coordinates the project with the property owner, Authorized Person and installation team. The Authorized Person is responsible for the technical work and required filings within their role.
Site Investigation and Assessment for Your Onsite Sewage System
A site assessment helps the Authorized Person understand the property and the proposed work. What needs to be examined depends on the site and the project. TTIS can coordinate the investigation and work with the Authorized Person as the design is prepared.
Navigating Onsite Sewage System Filing in BC
Where section 8 of BC’s Sewerage System Regulation applies, the Authorized Person files the required information and system plans with the health authority before construction. This is a filing process, not health-authority approval of the design.
TTIS coordinates with the property owner, Authorized Person and installation team. The steps depend on the project and the requirements that apply.
What to Expect: From Design to Letter of Certification
The steps and timing depend on the property, the work required and the people involved.
1. Assessment and design
The Authorized Person determines what assessment is needed and prepares the design for the project. TTIS can coordinate with you and the project team.
2. Filing, where required
Where section 8 of BC’s Sewerage System Regulation applies, the Authorized Person files the required information and plans with the health authority before construction.
3. Construction and closeout
The work is carried out in line with the project plans and applicable requirements. Where section 9 applies, the Authorized Person files the Letter of Certification within 30 days after construction is complete and provides the owner with the required project documents, including the plans and maintenance plan.
During construction, the Authorized Person may conduct a construction review, an inspection to verify that the work matches the design. This quality-control step catches problems early and ensures that the system is built correctly.
TTIS coordinates the entire process, site investigation, design, filing, construction, and certification, and keeps you informed at each stage. If you have questions about timeline expectations for your specific property, contact TTIS to discuss your project and get a realistic estimate based on your site and local conditions.
The right professional depends on the work your property needs.
In BC, an Authorized Person may be a ROWP or another professional who meets the requirements of the Sewerage System Regulation. Ask who will be responsible for the technical work and what their role covers.
How to Check Their Qualifications
If the person is a ROWP, you can check their registration in the ASTTBC Registrant Directory. If they are another type of professional, ask what qualification applies to their work.
Questions to Ask
- Who will assess the property and prepare the design?
- What work is included in the proposal?
- Who handles the filing, if one is required?
- What construction review and completion documents are included?
- What could affect the schedule or cost?.
Local Experience Matters
Ask whether the professional has worked on projects similar to yours and who will handle the assessment, design and any required filing.
Communication and Coordination
Look for someone who:
- Explains their role and findings in plain language
- Clarifies what work is included and who is responsible for each step
- Keeps you informed about what happens next
- Provides the project documents they are responsible for
TTIS coordinates with property owners, Authorized Persons and installation teams. Contact TTIS to discuss your project and possible next steps.
Frequently Asked Questions
What does a septic system design professional do?
They assess the property and prepare plans for the proposed onsite sewage system. The work required depends on the property and project.
How do I find a qualified onsite wastewater professional on Vancouver Island?
An Authorized Person may be a ROWP or another professional who meets the requirements of BC’s Sewerage System Regulation. You can check a ROWP’s registration in the ASTTBC Registrant Directory.
Does every septic system project follow the same filing process in BC?
No. The steps depend on the project and which parts of the regulation apply. Where sections 8 and 9 apply, the Authorized Person files the required information before construction and files the Letter of Certification within 30 days after construction is complete.
What documents should I receive when my septic system construction is complete?
For projects covered by section 9, the Authorized Person provides the owner with the system plans and specifications, a maintenance plan and a copy of the Letter of Certification. The regulation sets out these requirements.
