Northern Beaches Knockdown Rebuild: Wheeler Heights House Case Study
Updated: 5 days ago
Designing a custom home on a narrow, steeply sloping block presents challenges that go well beyond the appearance of the finished house.
Our completed Wheeler Heights House on Sydney's Northern Beaches demonstrates how careful site planning, creative building design and a well-considered approval strategy can transform a difficult property into a substantial family home.
The original dwelling was replaced with a contemporary two-storey residence incorporating a six-car basement garage, a separate two-bedroom secondary dwelling, swimming pool and outdoor entertaining areas.
Achieving this outcome required us to work through the site's significant slope, restricted building envelope, stormwater issues and Northern Beaches Council planning requirements.
Understanding the Wheeler Heights Site Constraints
The property presented several challenges that needed to be considered before developing the design.
With a narrow 13.41-metre frontage and approximately 6.7 metres of fall across the site, the design needed to accommodate a substantial family home while responding to the changing ground levels, building envelope and surrounding properties.
The owners' brief included:
Four bedrooms and multiple family living areas
A six-car basement garage for vehicles, equipment and storage
A separate 60 m², two-bedroom secondary dwelling
A swimming pool and outdoor entertaining areas
Good natural light, privacy and elevated district views
Significant stormwater issues also needed to be investigated and addressed early in the project.
These constraints influenced where the house could be positioned, how the different floor levels would connect and how the owners' requirements could be accommodated within the available building envelope.
Rather than forcing a conventional design onto the block, the aim was to use the property's characteristics to help shape the solution.
Designing a Custom Home Around the Slope
The approximately 6.7-metre fall across the property became an important part of the design.
Instead of treating the slope purely as an obstacle, we incorporated a substantial six-car garage beneath the main residence, making practical use of the change in ground levels.
The garage level was carefully positioned to achieve a workable driveway profile from Berith Street while accommodating the owners' extensive vehicle and storage requirements.
The principal living spaces were located above, allowing the home to take advantage of natural light, outdoor connections and elevated district views.
The upper floor was deliberately limited in scale to reduce the visual bulk of the building and maintain an appropriate relationship with the surrounding streetscape.
The result was a contemporary home designed specifically for the property, rather than a standard house plan adapted to fit a difficult block.
Contemporary Coastal Home Design and Family Living
The design followed a contemporary coastal approach, combining clean architectural lines, generous glazing and a restrained selection of materials.
The owners wanted a home that felt spacious, connected and comfortable while providing practical areas for everyday family life.
The design incorporated open-plan kitchen, living and dining areas, with strong connections to the covered alfresco and outdoor entertaining spaces.
Large windows were positioned to improve natural light and capture the outlook, while the arrangement of the living areas considered privacy, orientation and the relationship between internal and external spaces.
These decisions formed part of the overall design from the beginning rather than being addressed separately once the floor plans had been developed.
Interior Detailing and Practical Living Spaces
The interior continues the contemporary design approach while incorporating several distinctive features.
These include:
A black kitchen complemented by polished concrete flooring
An exposed spine staircase with timber dividing columns
A built-in study nook for working or studying from home
An upstairs lounge positioned to enjoy the elevated outlook
Open-plan family spaces connected to outdoor entertaining areas
The staircase provides a central architectural feature, while the arrangement of the living areas creates different spaces for family members to spend time together or separately.
The study nook and upstairs lounge provide additional flexibility without relying entirely on large, open-plan spaces.
Good custom home design is not simply about appearance. The position, proportions and connection between rooms have a direct influence on how comfortably the home functions.
Integrating a Secondary Dwelling, Pool and Outdoor Living
An important part of the brief was accommodating more than just the main residence.
The completed project includes a detached 60 m², two-bedroom secondary dwelling at the rear of the property.
Rather than treating the secondary dwelling as an afterthought, its position was considered alongside the main residence, swimming pool, landscaped areas and outdoor entertaining spaces.
This required careful planning of access, privacy, outdoor space and the relationship between the two dwellings.
The main home's covered alfresco includes a timber-lined ceiling and connects directly with the family living areas, extending the usable living space outdoors.
For properties with substantial accommodation requirements, it is important to consider how all the proposed buildings and outdoor areas will work together before finalising the main house design.
Northern Beaches Council DA Approval and Building Envelope Constraints
The project required a Development Application through Northern Beaches Council.
Along with the steep terrain and vehicle access requirements, the proposal involved a minor encroachment into the prescribed building envelope.
This required detailed planning justification to demonstrate why the variation was appropriate for the site.
Shadow analysis formed part of the Development Application documentation, addressing the proposal's relationship with neighbouring properties, solar access and privacy.
The design also needed to coordinate the main residence, secondary dwelling, swimming pool, vehicle access and relevant stormwater requirements.
Following Development Application approval, the project progressed through Construction Certificate documentation.
This illustrates why understanding planning controls from the beginning of a custom home project is so important.
A design needs to respond not only to the owners' brief but also to the physical characteristics of the property, neighbouring development and the applicable approval requirements.
The Completed Wheeler Heights House
The completed home brings together several substantial requirements within a narrow and sloping residential property.
It includes a contemporary four-bedroom family residence, six-car basement garage, separate two-bedroom secondary dwelling, swimming pool and integrated outdoor living.
Each element required careful consideration of its position within the site.
The project demonstrates how a challenging block can offer opportunities for creative building design, provided the slope, access, planning requirements and overall brief are considered together.
For Distinct Innovations, Wheeler Heights House is an example of our approach to custom home design and architectural drafting: understanding the property first, developing a site-specific solution and preparing the documentation required to progress through the approval process.
Considering a Knockdown Rebuild on the Northern Beaches?
Not every existing home needs to be demolished. In some cases, a well-planned renovation or extension may achieve the result you want.
However, when the existing house cannot accommodate your needs without major structural changes or ongoing design compromises, a knockdown rebuild may be worth investigating.
Before making that decision, it is important to understand the property's building envelope, slope, access, drainage, orientation and relevant planning controls.
These early investigations help establish what the site can realistically accommodate and whether a Development Application or Complying Development Certificate pathway may be appropriate.
Our Building Design Services on the Northern Beaches page provides further examples of our residential design experience across Wheeler Heights, Collaroy Plateau and surrounding suburbs, including custom homes, knockdown rebuilds, extensions and major renovations.
You can also explore our Knockdown Rebuild Design Services and our experience designing homes for Sloping and Challenging Sites.
Planning a Custom Home on the Northern Beaches?
Distinct Innovations is an independent building design and architectural drafting studio based in Castle Hill, servicing Greater Sydney, including the Northern Beaches.
With more than 30 years of residential design experience, we provide custom home design, architectural drafting, consultant coordination and DA, CDC and Construction Certificate documentation.
Our work is personally led by Luke Van Jour, an Accredited Building Designer with the Building Designers Association of Australia (BDAA No. 6164).
We design homes and prepare plans and approvals. We do not undertake building construction.
If you are considering a knockdown rebuild, major renovation or custom new home on the Northern Beaches, start by telling us about your property and what you would like to achieve.
Submit your project details through our enquiry form, and we can arrange an initial phone, Zoom or studio meeting to discuss your ideas, our services and the next steps.
