Heritage Home Extension in Concord: Salt Street House Case Study
Can a heritage-listed home have a contemporary rear extension without losing the character that makes it worth keeping? At Salt Street House in Concord, Distinct Innovations designed a new single-storey rear addition behind an existing Inter-war bungalow. The project retained the original street presentation while introducing open-plan family living, a covered alfresco area, swimming pool and a new tandem garage.
The challenge went well beyond the floor plan. Heritage significance, neighbouring properties, established trees and the position of the pool all influenced the design and Canada Bay Council approval.
The Project at a Glance
Heritage: Individually listed local heritage home, not a property within a Heritage Conservation Area.
Design: Retained original residence with a contemporary single-storey rear extension, pool and garage.
Approvals: Development Application supported by heritage, streetscape and arboricultural assessments.
Outcome: A completed family home recognised for heritage design excellence at the Building Designers Association of Australia National Design Awards 2025.
Preserving What Made the Original Home Special
The existing house was an Inter-war brick bungalow with a terracotta-tiled roof, distinctive street-facing gables, an open verandah, bay window, timber-framed windows and a matching brick front fence.
These features contributed to its heritage significance. The neighbouring property was also heritage listed, so the relationship between the two homes and the character of the street needed careful consideration.
Our approach was to retain the original front building form and significant details while concentrating the larger changes at the rear. This allowed the existing house to remain recognisable from Salt Street without preventing the owners from enjoying a more practical home.
Designing a Modern Extension Behind a Heritage Façade
The owners wanted a larger kitchen, dining and family area connected to an outdoor entertaining space and swimming pool.
We designed a contemporary single-storey addition in place of a smaller rear portion of the home. Large areas of glazing connect the new living spaces to the alfresco, garden and pool, bringing light and openness to a house originally planned around more separated rooms.
Importantly, the extension was designed to sit below the principal roof ridge and remain secondary to the original house. Its placement, roof form and materials were considered alongside the retained heritage fabric, rather than treating the new work as a separate building.
The replacement garage was also positioned and detailed to complement the existing residence without dominating the street presentation.
Working Through Canada Bay Council's Heritage Requirements
A heritage extension is not simply a question of choosing between traditional and contemporary styling.
The proposed work must respond to the significance of the property and the planning controls that apply to it.
For Salt Street House, our residential building design, architectural drafting and Statement of Environmental Effects were coordinated with a specialist Statement of Heritage Impact and streetscape assessment. These documents considered the original fabric, the scale and visibility of the extension, the neighbouring heritage item and the proposed changes to the site.
Canada Bay Council approved the Development Application subject to conditions. A subsequent modification addressed further details of the approved development.
This experience illustrates why we investigate heritage and site constraints early. A design that looks appealing on paper still needs to be properly documented, assessed and capable of satisfying approval conditions.
The Less Obvious Challenge: Trees, Pool and Landscaping
The swimming pool and outdoor areas were important parts of the owners' brief, but their position could not be decided on appearance alone.
An arboricultural assessment considered the existing trees and the impact of proposed building works, excavation and landscaping. Council's conditions required the retention of important front-garden elements and restricted how far the pool and associated works could extend into the rear garden.
That meant coordinating the building design with the landscape, tree protection measures and construction documentation. Changes to one element could affect several others.
For homeowners in Concord and Sydney's Inner West, this is a practical lesson: a heritage extension can be shaped as much by trees, boundaries and outdoor works as by the house itself.
A Comfortable Home, Not Just an Attractive Extension
The new living spaces were planned to improve light, outlook and the connection between inside and outside.
Glazing, shading and the building's thermal performance were considered as part of the design, while BASIX documentation addressed applicable commitments for the alterations, building fabric, water use and swimming pool.
These matters are especially important when updating older homes. The aim is to make the new spaces comfortable and functional without overlooking the value of the original building.
The Completed Result and What It Shows
Salt Street House now combines its retained Inter-war character with contemporary family living at the rear. The project received national recognition for heritage design, demonstrating that a modern addition can work successfully with an older, individually listed home.
View the completed Salt Street House gallery for the before-and-after photographs, new living areas and pool. You can also read about the national heritage design award.
The lesson is not that every heritage house should have a modern extension. It is that the right approach starts with understanding the building's significance, the site constraints and what the owners need from the home.
Frequently Asked Questions
Can a contemporary rear extension be approved on a heritage-listed home in Concord?
Yes, it may be possible. Salt Street House is a completed example as is our Creewood House also in Concord, but each proposal must be assessed against the significance of the property, applicable planning controls and the impact of the new work. Approval should never be assumed.
Will I need a Development Application and a heritage report?
That depends on the heritage status and the proposed work. Salt Street House required a Development Application supported by a specialist heritage assessment. The appropriate pathway and documentation should be established before developing the design too far.
Can existing trees or a proposed pool affect approval?
Yes. Tree protection zones, excavation, landscaping and the location of a pool can affect the extent and positioning of an extension. These issues should be considered together from the start.
Planning a Heritage Extension in Concord or Sydney's Inner West?
Distinct Innovations designs heritage renovations and extensions, including contemporary rear additions behind retained original homes. We prepare the building design and architectural drafting, coordinate specialist consultants where required and manage the documentation for the relevant approval process.
Explore our Heritage Home Extensions and Renovations, Inner West and Strathfield building design experience and Extensions and Renovations services.
If you're considering alterations to a heritage-listed home or a property in a Heritage Conservation Area, send us your property details and what you want to achieve. We can then arrange an introductory phone, Zoom or studio meeting to discuss the next steps.
