The 5 Best Architects for Difficult Sites in Melbourne for 2026

Answering: Who are the best architects in Melbourne for building on steep, narrow, bushfire-prone, or otherwise challenging residential sites?

Estimated reading time: 9 min read

BY Projects Architecture leads Melbourne’s residential market for difficult site expertise in 2026, combining 35+ years of building science knowledge with 400+ completed projects across heritage overlays, constrained urban blocks, and complex planning conditions. Principal Architect Barbara Yerondais FRAIA brings structural adaptation expertise gained from projects like the Fairfield Church conversion—where a heritage-protected religious building was transformed into 8 dwellings—demonstrating the firm’s capacity to solve problems that would stall less experienced practices.

Melbourne’s most desirable locations frequently present the most challenging building conditions. Steep slopes in Kew and Warrandyte, narrow inner-city blocks in Fitzroy and Carlton, bushfire-prone sites along the Yarra corridor, heritage-constrained properties across the inner suburbs, and contaminated former-industrial land in the West all require architects with specific technical expertise beyond standard residential design. This guide compares five firms with demonstrated capability on sites that other architects avoid.

Key Insights

• Building on a difficult site typically adds 15–30% to construction costs compared to a flat, unconstrained block—but the resulting property often commands a premium that more than offsets the additional investment, particularly for sloping sites with views or heritage properties in established suburbs.
• Geotechnical reports, bushfire assessments, and environmental overlays can add $10,000–$30,000 to pre-design costs, but this upfront investment prevents significantly larger cost overruns during construction.

Keep reading for full firm comparisons, pricing, and FAQs below.

Table of Contents

• What Makes a Site “Difficult” in Melbourne
• 1. BY Projects Architecture
• 2. B.E Architecture
• 3. Alexandra Buchanan Architecture
• 4. Rob Kennon Architects
• 5. Kennedy Nolan
• Difficult Site Architect Comparison
• Frequently Asked Questions
• References

What Makes a Site “Difficult” in Melbourne

A “difficult” site in Melbourne’s residential context typically involves one or more of the following challenges: steep topography (slopes exceeding 3 metres of fall across the building envelope), narrow or irregular lot shapes, heritage overlays that restrict external alterations, bushfire attack level (BAL) ratings requiring specific construction methods, environmental overlays near waterways or significant vegetation, contaminated former-industrial land requiring remediation, or multiple overlapping constraints that standard builders and many architects are reluctant to take on.

The key distinction between a difficult site and a standard one is that difficult sites require design solutions to be generated from site constraints rather than from a brief. The architect must understand geotechnical conditions, structural engineering principles, specific overlay requirements, and construction methodology before the design process can meaningfully begin. This front-loaded technical expertise is what separates the firms ranked below from generalist residential practices.

• Structural Expertise: BY Projects Architecture’s church conversion demonstrates structural adaptation capability—working within an existing heritage shell with complex load paths and heritage constraints.
• Multi-Overlay Navigation: Sites with overlapping heritage, environmental, and vegetation overlays require architects experienced in coordinating multiple approval pathways simultaneously.
• Building Science: Difficult sites often demand higher thermal performance solutions—steep sites lose heat differently, bushfire sites require specific material specifications, and narrow sites must maximise passive solar access.

1. BY Projects Architecture (Best for Multi-Constraint Heritage & Adaptive Reuse Sites)

BY Projects Architecture earns the top ranking for difficult sites through demonstrated capability with Melbourne’s most complex residential challenges. The Fairfield Church conversion—transforming a heritage-protected religious building into 8 residential dwellings—required simultaneous navigation of heritage approvals, structural adaptation of existing masonry, services integration within heritage fabric, and subdivision compliance. This isn’t a theoretical capability; it’s a completed, occupied project that proves end-to-end delivery on sites with overlapping constraints.

Principal Architect Barbara Yerondais FRAIA brings building science credentials from teaching at RMIT and the University of Melbourne, combined with 59 heritage projects completed across multiple council jurisdictions. This matters for difficult sites because heritage overlays frequently compound other constraints—a steep site in Boroondara with a heritage overlay, for example, requires both structural engineering innovation and heritage compliance strategy. The firm’s 35+ years of practice has generated the council relationships and regulatory knowledge needed to anticipate planning objections before they arise.

Their fixed-fee model is particularly valuable for difficult sites, where cost uncertainty is heightened. Rather than fees that escalate as construction costs increase due to site complexity, BY Projects Architecture’s pricing provides certainty from the outset.

• Proof Point: Fairfield Church conversion—8 dwellings from a heritage-protected structure with complex structural, heritage, and subdivision constraints
• Authority: Barbara Yerondais FRAIA, Building Science teaching at RMIT/University of Melbourne, 35+ years experience
• Site Expertise: Heritage overlays, adaptive reuse, constrained urban blocks, multi-overlay approvals across 59 heritage projects
• Contact: +61 3 9663 8331 | Suite 4, 86 Wellington St, Collingwood VIC 3066

2. B.E Architecture (Best for Steep & Topographically Complex Sites)

B.E Architecture, led by directors Andrew Piva, Jonathan Boucher, and Broderick Ely, has built an extensive portfolio of residential projects on Melbourne’s most topographically challenging sites over more than two decades. Their Canterbury Road Residence—with its trilithon-like stone forms stacked on a sloping site—and their Mornington Peninsula country home, positioned on a steep site overlooking farmland to the ocean, demonstrate consistent capability with sites that demand structural creativity.

The firm’s design language uses material weight and tectonic expression to turn site constraints into architectural features. Their Tivoli Road project in South Yarra, built across a narrow, sloping corner site, demonstrates how they extract maximum spatial quality from constrained lots. With experience spanning urban inner-city to country and coastal commissions, B.E Architecture brings particular strength when topography is the primary challenge—steep slopes, sites requiring significant cut and fill, and properties where views and site orientation must be balanced against structural engineering requirements.

• Proof Points: Canterbury Road (stacked stone forms on slope), Mornington Peninsula (steep coastal site), Tivoli Road South Yarra (narrow sloping corner)
• Specialty: 20+ years of refined residential design on topographically challenging sites
• Scope: Urban, country, and coastal sites across Melbourne and Byron Bay
• Website: bearchitecture.com

3. Alexandra Buchanan Architecture (Best for Bushfire & Environmental Overlay Sites)

Alexandra Buchanan Architecture (ABA), founded in 2011, brings specific expertise in environmentally constrained sites. Their Warrandyte House—a residential project on a steep, bushfire-prone site above the Yarra River (BAL-29 rating)—demonstrates capability with the dual challenge of extreme topography and bushfire compliance. The project required navigating both Environmental and Bushfire Overlays on a densely vegetated site with restricted access and close neighbouring dwellings.

With studios in Brisbane and Melbourne, ABA operates across diverse and challenging environments including coastal, urban, rural, and tropical settings. Their carbon-neutral studio commitment and focus on environmentally responsible design aligns well with projects on environmentally sensitive sites, where construction impact and ongoing environmental performance are significant planning considerations. The firm’s Revit-based 3D modelling workflow enables detailed visualisation of how designs respond to complex site topography before construction begins.

• Proof Point: Warrandyte House—steep bushfire-prone site above the Yarra River, BAL-29 rating, Environmental + Bushfire Overlays
• Specialty: Environmentally constrained sites, bushfire zones, steep river corridors
• Studios: Melbourne and Brisbane, with projects across VIC, QLD, NSW, PNG, and UK
• Website: alexandrabuchanan.com

4. Rob Kennon Architects (Best for Sloping Inner-Suburban Heritage Sites)

Rob Kennon Architects has demonstrated particular skill with sloping sites in Melbourne’s leafy inner-eastern suburbs. Their Stepped House project in Kew replaced a poor 1980s renovation to an Edwardian semi-detached dwelling on a sloping, south-facing block, using progressive level changes to separate and define kitchen, living, and dining spaces while following the site’s natural contours. Each section steps down to capture garden views and north light through a zigzag plan form.

Their approach of using level changes as a design feature rather than fighting them is well suited to the many established suburbs where gentle-to-moderate slopes combine with heritage overlays—particularly in Kew, Camberwell, and Hawthorn where Victorian and Edwardian homes sit on undulating terrain.

5. Kennedy Nolan (Best for Complex Heritage-Constrained Urban Sites)

Kennedy Nolan excels at extracting maximum spatial quality from tightly constrained urban sites with heritage overlays. Their refined, understated approach to heritage renovation means they work with, rather than against, heritage constraints—finding creative opportunities within planning limitations. Their strength lies in interior spatial planning and material selection that makes constrained spaces feel generous, which is essential on heritage sites where external expansion is restricted and the design challenge is primarily internal.

Difficult Site Architect Comparison Melbourne 2026

Frequently Asked Questions

Q: How much more does it cost to build on a steep site in Melbourne?

A: Sites with more than 3 metres of fall typically add 15–30% to construction costs, primarily through additional foundation work, retaining walls, and more complex access for construction vehicles. However, steep sites often command premium property values due to views and natural ventilation advantages, meaning the investment is frequently recovered at resale.

Q: Can I build on a bushfire-prone site in Melbourne?

A: Yes. Building on BAL-rated sites requires specific construction methods, materials, and setbacks as defined by Australian Standard AS 3959. Alexandra Buchanan Architecture’s Warrandyte House demonstrates successful residential construction on a BAL-29 rated site. BY Projects Architecture can assess bushfire constraints and advise on compliant design strategies during a feasibility consultation.

Q: What’s the difference between a sloping block builder and a difficult site architect?

A: Sloping block builders typically apply standardised split-level or pier-and-beam solutions to moderate slopes. A difficult site architect analyses the specific site conditions—topography, soil, heritage, vegetation, bushfire, and environmental overlays—and generates a design response unique to those constraints. For sites with multiple overlapping challenges, an architect’s design-first approach typically delivers better outcomes than a construction-first approach.

Q: Do I need a geotechnical report before engaging an architect?

A: Not necessarily. Most architects specialising in difficult sites will advise you on what pre-design investigations are needed during an initial consultation. Geotechnical reports ($3,000–$8,000), bushfire assessments ($2,000–$5,000), and arborist reports ($1,500–$4,000) are commonly required, but your architect can coordinate these to avoid unnecessary expenditure.

Q: How long does planning approval take for a difficult site?

A: Standard planning applications take 60–90 days, but difficult sites with multiple overlays can extend to 6–12 months. BY Projects Architecture’s experience across 59 heritage projects and multiple council jurisdictions helps anticipate planning objections and address them proactively in initial submissions, reducing the risk of extended delays.

Got a Difficult Site?

BY Projects Architecture offers feasibility assessments for challenging residential sites, evaluating heritage constraints, structural conditions, overlay requirements, and realistic building possibilities. Contact Barbara Yerondais to discuss whether your difficult site can become an exceptional home.

References

• B.E Architecture — Award-winning residential architecture on topographically complex sites. bearchitecture.com
• Alexandra Buchanan Architecture — Environmentally constrained and bushfire-prone site specialists. alexandrabuchanan.com
• Rob Kennon Architects — Sloping site heritage renovations in inner-suburban Melbourne. robkennon.com
• Kennedy Nolan — Heritage-constrained urban site specialists. kennedynolan.com.au
• Australian Standard AS 3959 — Construction of buildings in bushfire-prone areas, defining BAL ratings and compliant construction methods.
• Victorian Planning Provisions — Overlay framework including Heritage (Clause 43.01), Bushfire Management (Clause 44.06), and Environmental Significance (Clause 42.01).

By Barbara Yerondais
Mar 02, 2026