What We Do

At Sullivan Hall facilitating great form and remarkable buildings is what drives us. Our roots are based in the delivery of high-end architecturally designed residential builds where form governs.

We are motivated to provide a structural engineering solution that harmonises with the architectural vision on these complex homes. Through our early engagement, co-ordinated approach, and collaborative design process we deliver results that will impress any Architect or Designer. Through our BIM process and increased level of development, we create workable solutions that result in a smoother consenting and construction process.

We offer civil engineering design services for residential projects allowing you to have a complete design service package.

At Sullivan Hall, we deliver civil and infrastructure solutions that bring land development projects to life. From early feasibility through to construction certification, we help our clients create well-designed, compliant, and sustainable places to live, work, and connect.

Strong relationships and open communication are central to how we work. We regularly collaborate with architects, planners, and other consultants — providing seamless civil input from concept through to consent. Our experience navigating council processes helps projects progress smoothly and efficiently, reducing uncertainty for clients.

We believe great engineering is about more than compliance — it’s about clarity, collaboration, and care for the environment. At every stage, we focus on practical solutions that balance client vision with long-term performance and community outcomes.

Land Development & Subdivision

We provide end-to-end civil engineering services for residential and mixed-use developments, ensuring every design is efficient, buildable, and meets regional standards.

• Subdivision planning and infrastructure coordination
• Earthworks design and sediment control strategies
• Master planning and integration with landscape and architecture
• Compliance with District and Regional Council requirements

Infrastructure Design & Delivery

We design, document, and manage the essential networks that make communities function — from the road beneath your feet to the pipes and utilities below ground.

• Stormwater, wastewater, and potable water networks
• Road and access way design for public and private developments
• Coordination of utility services (power, gas, telecoms)
• Design documentation, as-builts, and certification support

Flood Risk & Stormwater Management

Our engineers bring technical rigour to flood risk and stormwater design, helping clients balance development goals with environmental resilience.

• Hydraulic and hydrological modelling
• Flood hazard assessments and technical reporting for consent
• Water Sensitive Design (WSD) and low-impact stormwater strategies

Construction Management & Certification

We stay involved through the delivery phase, supporting contractors and councils to ensure works are built to design intent and compliant with approval conditions.

• On-site monitoring and coordination of civil works
• Construction management and quality assurance
• Engineering Approval Completion Certificates (EACC) and S224c subdivision completion
• Vesting public assets to Council.

Partnering with Sullivan Hall will ensure your civil projects run smoothly and practical solutions are found. Please contact Tarif Ahmed (our Civil Team Leader) or call on 021 063 7349.

Enhance Your Architectural Vision with Sullivan Hall’s Thermal Modelling Services

At Sullivan Hall, we are thrilled to collaborate with architects, offering Thermal Modelling Services that support your designs for seamless H1 compliance. As experienced structural engineers, we are uniquely positioned to integrate this information into the structural design, ensuring a fully coordinated and smarter building solution.

Unlike the conventional schedule method many architects still rely on, our cutting edge approach utilises both modelling and calculation methods. This ensures a comprehensive assessment of your building’s thermal performance, focusing on the areas that have the most impact on heating and cooling loads. This precision means you avoid over-insulating where it’s unnecessary, saving on construction costs and improving long-term energy efficiency.

Why Architects Choose Sullivan Hall’s Thermal Modelling Services

• Accurate Energy Performance Forecasts

Understand the energy efficiency of your designs before construction begins.

• Custom R-Values for Complex Geometries

Generate accurate R-values for unique design features, ensuring compliance without compromising on creativity.

• Cost-Effective Insulation Strategies

Focus on insulation where it matters most, minimising waste and construction costs.

• Enhanced Occupant Comfort

Improve the comfort of occupants through better thermal regulation.

• Exceed H1 Code Requirements

Ensure your designs not only meet but exceed New Zealand’s H1 building code, elevating your project to a world class standard, all while achieving your architectural vision.

• Environmentally Responsible Solutions

Reducing building waste with unnecessary materials, reduce lifetime energy costs and lowering carbon footprint.

Partnering with Sullivan Hall will ensure that your designs are optimised for energy efficiency and compliance without sacrificing aesthetic or functional goals. Let’s work together to enhance your projects with smart, effective thermal solutions that are future-focused, sustainable, efficient, and environmentally responsible. Please contact Lindsay Muir at lindsay@sullivanhall.co.nz or call on 021 794 517 to see how Sullivan Hall can positively impact your build.

Sullivan Hall has the capacity to provide specialist seismic assessment and strengthening design of your building assets. We conduct seismic assessment of existing buildings including heritage, commercial, industrial and residential buildings.
Applying the latest analysis methods and software, from equivalent static method to non-linear time history analysis for more complex structures, we develop truly workable seismic repair and strengthening solutions. We can offer a comprehensive risk assessment of earthquake damaged buildings also.

We engage with all stakeholders to ensure the structural solution presented imposes the minimum distribution. We develop strengthening schemes from initial concept through to full consent documentation. This allows you, as the building owner, to make an informed decision as to the feasibility of a project, balancing your investment with projected returns.

Sullivan Hall’s empathy for architectural form translates seamlessly to the needs of heritage buildings. We are enthusiastic about saving and showcasing the history of our built environment.

We enjoy the process of developing discrete structural solutions that do not detract from the existing. We have a wealth of experience in carrying out strengthening and commercial fitouts of heritage and older period buildings.

At Sullivan Hall we offer our peer review services to other consultants. We carry out both structural and regulatory reviews of designs. We can offer concept design and feasibility reviews and report on value engineering options.

We can make available producer statements (PS-2) for Peer Review to submit to territorial authorities assisting with the consenting process.

With the geographical spread of our offices, Sullivan Hall is well placed to act as observer on behalf of other consultants. We can conduct full site inspections as well as inspections of fabricated elements at fabrication plants.
We also have access to specialist testing facilities, allowing us to monitor the testing of elements such as weld, concrete cylinder, and mortar.

Upon completion of any monitoring regime, we provide reports tailored to your specified requirements.