House Extensions
Quality home extensions that enhace the enjoyment and value of your home.
Common home extensions include second storey extensions, kitchen extensions, room extensions, loft conversions, extending house to garage and more. Smart planning and management, transparent costing and strong client builder communication are essential to completing home extensions to a high standard and within budget.
Key points for a successful home extension
Shared vision for the home extension
Guarantee to stay within budget
Ensure the consent process is managed correctly
Professional management from design to build
Clear and transparent communication
Whether it’s a single room extension or a luxury custom new build, we’re home builders that guarantee high standard workmanship, smart planning and project completion within your budget.
– Anton Shipov, Builder & Founder
Customer Reviews
Build off Our Experience with an Extension Plan
Project Case Studies
Groundfloor Extension with Bedroom
Double Storey Extension
house extensions
Home Extensions
Design & Planning
Structural Engineering
Professional Roofing
Second Storey Extensions & Additions
Finished to the Highest Standard
Home extensions can be a cost effective way to add improve the liveability and value of your existing home.
House extension projects can get complex so we pay special attention to the planning and estimate stage to make sure your investment gets delivered to the highest standard within your timeframe and budget – guaranteed.
home extensions
Auckland home extensions done right
End to end project management
Qualified in building and structural engineering
Guaranteeed built to a high standard
Advice on the consent process and building standards
Clear communication and advice
Red Square Construction’s qualified builders and engineers bring reliable management and construction to your house extension.
Red Square has the knowledge and expertise in construction management and civil engineering to make your dream home extension both a built to last reality and a positive experience!
Call us to discuss your extension project at any stage.
house extensions
Home extension costs
Single room extension approx $4000 per sqm.
Garage extension approx $3000-$4000 per sqm.
Ground floor extension $2500-$4000 per sqm.
2nd storey extension $3500-$5000 per sqm.
Basement conversion approx $1500-$4000 per sqm.
Garage conversion $1500-$4000 per sqm.
These rates can help give you an idea of the cost of your planned house extension.
The cost of a house extension depends on the type of extension and can be approximated on a cost per square meter basis.
Rates given are for the base building cost, and generally exclude costs of local authority fees, external works, and utilities, as these will vary for each situation.
Work with us and bring clarity to the known and potential costs early in the design and planning stages of your build.
house extensions
2nd Story Extensions
We design, engineer & build
Can work positively with your designers, architects or engineers
Licenced builders
Qualified civil engineer
Guarantee to stay within budget
A second floor extension / 2nd storey addition is an exciting project that can add great livability and value to the existing home.
Good planning and the right team are essential for a successful no-hassle build.
We value the right choice of materials and design to appropriately complement and add real value to the existing home.
The approximate basic build cost of a second-storey extension is $3500 – $5000 per sqm.
Read about one of our double-storey extension and alteration projects here.
house extensions
Ground floor “single-storey” and rear house extensions.
End to end management or work with your team
Ground floor bedroom extensions
Rear house extension for bedrooms (or kitchens)
Bungalow back extensions
Extensions on sloping properties
Single-storey or rear house extensions are the most cost effective way to add indoor space to your home.
Successful extensions begin with an experienced review of the section, logistics and foundation requirements.
We can engage from any stage of design or build.
Read about one of our ground-floor house extension projects here.
house extensions
Garage extensions
Smart material and design choices to complement your home
High standard groundwork and foundations
Lead by a civil engineer and licensed builder
Transparent costings and guaranteed to stay in budget
Double-storey garage extensions
The Auckland climate begs for an internal garage. A quality custom garage extension can add both function and style to the existing home. We put special emphasis on the design and planning phase to ensure the best material and design choices.
We can take your garage extension project end to end or work with your designer and architect to successfully complete the build.
We guarantee to stay within your budget, and value good communication and a clear understanding of costs.
Interested in having a chat?
Reach out to our main office and we will respond to you shortly.
