Five-Storey Rental Building

Proposed Mixed-Use Residential Development at King Street East, Oshawa
 
Site Location:
The site is located at 954 King Street East in the City of Oshawa, within a dense urban corridor undergoing active intensification. The property is subject to regional servicing requirements and municipal road widening constraints.
 
Proposed Development:
This proposed development features a 5-storey mixed-use residential building designed to optimize urban density within a constrained infill site. The project includes a total of 32 residential units, comprising studio, one-bedroom, and two-bedroom layouts, with a total gross construction area of approximately 3,763 m².
A single level of underground parking (P1) accommodates 34 parking spaces, along with bicycle storage and essential mechanical rooms. The ground floor incorporates a commercial component that enhances the streetscape while maintaining secure and private access to residential areas.
The development also addresses significant site constraints, including a required 9.50-meter road widening along King Street East, which has been carefully integrated into the site design.

 
Services Provided by N & N Engineers LTD:
N & N Engineers LTD provided a fully coordinated scope of architectural and civil engineering services, ensuring alignment between design, infrastructure, and municipal requirements.
 
Functional Servicing Report:
Comprehensive assessment of existing municipal infrastructure, including water and sanitary systems, to confirm capacity and servicing feasibility for the proposed development in coordination with regional requirements.
 
Stormwater Management Report:

The stormwater management strategy is based on a zero-impact design approach, ensuring all runoff is managed within the site boundaries.

The system includes a dry pond and high-capacity infiltration galleries designed to accommodate up to 100-year storm events. Low Impact Development (LID) measures are implemented to maintain pre-development groundwater recharge rates and protect the Hanlon Creek subwatershed.

Water quality is enhanced through the use of Stormceptor (OGS) units, achieving 80% removal of Total Suspended Solids (TSS) prior to infiltration, meeting enhanced treatment criteria.

 
Site Servicing Plan:
Engineering design for servicing connections to the existing 300mm municipal sanitary sewer and 300mm water main, including coordination with regional infrastructure and fire flow requirements.
 
Grading Plan:
A detailed grading strategy was developed to accommodate significant road widening requirements while maintaining safe pedestrian access and efficient vehicular circulation, including fire routes and waste collection.
 
Erosion Control Plan:
Comprehensive erosion and sediment control strategy designed to mitigate environmental impacts during construction within a constrained urban setting.
 
Sanitary Sewer System Analysis:
Evaluation of sanitary system performance under peak loading conditions to ensure compliance with municipal and regional servicing standards.
 
Groundwater Drainage System Design:
Design of a dedicated foundation drainage system to manage groundwater independently from stormwater systems, ensuring long-term performance and protection of the underground parking structure.
 
Purpose and Impact:
The engineering and architectural services provided by N & N Engineers LTD enable municipal staff and regional authorities to evaluate the development’s impact on existing infrastructure while ensuring compliance with zoning, servicing, and environmental requirements.
By integrating architectural and civil disciplines under a unified workflow, the project achieves improved coordination, reduced approval timelines, and optimized construction efficiency. This development demonstrates how high-density urban infill can be delivered with both technical precision and strong urban design presence.