Renovating or extending a character home is an exciting opportunity to create a space that better supports your lifestyle while preserving the features that make your home unique.
It is also a significant undertaking, so it is natural to have questions about costs, timelines, approvals and what to expect throughout the building process.
To help you begin planning with greater clarity and confidence, we have answered some of the questions Adelaide homeowners commonly ask before starting a character home renovation or extension.
How Much Does a Character Home Renovation or Extension Cost?
Every character home and every family are different, which means there is no single cost that applies to every renovation or extension.
The overall investment will be influenced by factors including:
- The size and complexity of the extension
- The condition of the existing home
- Structural work required
- Site access and ground conditions
- The level of architectural detail
- Materials, fixtures and finishes
- Heritage or council requirements
- Upgrades to existing plumbing or electrical services
- Whether original character features will be restored or replicated
Whether you are in the early research stage or already have plans prepared, our aim is to provide honest advice about costs as early as possible. This helps you make informed decisions, establish a realistic budget and move forward with greater confidence and financial clarity.
Before building begins, BTF Constructions provides a comprehensive Cost Trade Breakdown and Building Schedule, giving you a clear understanding of the project scope, costs and inclusions.
How Long Will the Renovation or Extension Take?
No two building projects are the same, so the construction timeframe will depend on the size, design and complexity of your project.
It is also important to allow time for the stages that take place before construction begins. These may include:
- Initial consultations
- Design development
- Engineering and documentation
- Planning and building approvals
- Detailed costing
- Contract preparation
A substantial bungalow or character home extension will generally take longer than a smaller internal renovation, particularly when the project involves structural changes, custom joinery, detailed finishes or the careful integration of old and new architecture.
While every project is different, our large-scale extensions and full-home renovations have typically spanned approximately 10 to 14 months once construction is underway.
We understand that every family’s needs and circumstances are different. We work closely with you to establish a realistic construction schedule and keep you informed throughout the process, helping you plan temporary accommodation and look forward to when you can settle back into your completed home.
Will the Builder Manage Council Approvals?
If you engage BTF Constructions under a Professional Services Agreement, our team can coordinate the building documentation and approvals required to bring your project to a construction-ready stage.
This can include preparing and submitting the required information, managing correspondence with the relevant professionals and authorities, and keeping you informed as the application progresses.
Character home renovations may require additional consideration depending on the property’s location, zoning, heritage status and council requirements. Involving an experienced builder early can help identify these requirements and ensure they are considered as part of the design and planning process.
Can I Change My Plans After They Have Been Approved?
Plans can be changed after approval, and the steps required will depend on the extent of the proposed changes.
Minor adjustments may be relatively straightforward, while more substantial changes may require revised drawings, updated engineering documentation or variations to existing approvals.
Taking the time to carefully consider your plans during the design stage helps create a smoother pre-construction process. However, we understand that ideas and circumstances can evolve. If you would like to make a change, we will work through the options with you and help find the best way to achieve your desired result.
Depending on the change, we may need to consider:
- The overall design
- Structural requirements
- Council approvals
- Project costs
- Material selections
- Construction timeframes
Raising potential changes as early as possible allows us to provide clear guidance and incorporate them into the project with care.
Can Changes Be Made Once Construction Has Started?
We understand that ideas can continue to develop once you begin seeing your home take shape. Where possible, BTF Constructions will work with you to explore changes and help achieve the result you are looking for.
Some changes may affect the project’s cost or timeframe, depending on the stage of construction and the work involved. If this occurs, we will clearly explain the available options and any implications so you can make an informed decision before work proceeds.
Open communication is important throughout the building journey, and we encourage you to raise any questions or ideas with our team as early as possible.
What Is the Difference Between a Custom Builder and a Volume Builder?
A volume builder generally works from a collection of predetermined home designs, with a set range of layouts, materials and finishes. This approach allows homes to be delivered in larger numbers through a standardised process.
A custom builder such as BTF Constructions creates a design around the individual property, its architecture and the homeowner’s lifestyle.
This is particularly valuable when renovating or extending an Adelaide character home. The existing building may include original stonework, decorative ceilings, timber floors, fireplaces, leadlight windows or detailed verandahs that deserve to be carefully protected and incorporated into the new design.
Rather than applying a standard solution, a custom builder considers how the new spaces will connect with the existing home, both visually and functionally.
At BTF Constructions, every home and extension is individually considered. Our completed projects reflect the needs and personal style of each client while responding thoughtfully to the character and architecture of their property.
Can I Use My Own Suppliers or Trades?
BTF Constructions works with an established network of trusted suppliers and trades who understand our expectations around quality, scheduling, safety and communication.
If there is a particular supplier, product or trade you would like to involve, we will happily discuss this with you during the planning stage and explore how it could work within your project.
Who Will Be My Point of Contact During the Build?
Clear and consistent communication is an important part of every renovation or extension.
As a small and dedicated building company, BTF Constructions clients remain connected with our team throughout their project. Brett is the primary contact for technical and construction-related questions, with support from the wider BTF Constructions team throughout the building journey.
You will also receive access to an online client portal where you can view project information, follow progress and stay informed throughout construction.
Can I Visit the Site During Construction?
Staying connected to your build is an important and exciting part of the journey. We encourage site visits at key stages of construction so you can see the progress and watch your plans come to life.
To ensure each visit is safe and valuable, site access is arranged with the BTF Constructions team in advance. This also allows the appropriate team member to be available to guide you through the work and answer any questions you may have.

How Will I Know When the Home Is Ready?
As your new spaces begin to take shape, we will keep you updated on the project’s progress and anticipated completion timeframe.
Your online client portal provides 24-hour access to the project schedule and progress updates, helping you feel connected to your build wherever you are.
As completion approaches, we will guide you through the handover process and keep you informed about the expected timing. This gives you the opportunity to make plans for your return and prepare to enjoy your newly completed home.
Start Planning Your Character Home Transformation
A successful character home renovation or extension begins with thoughtful planning, open communication and the right team around you.
Engaging your builder early gives you the opportunity to explore what is possible, understand the process and align the design with your priorities and budget before plans are finalised.
BTF Constructions specialises in premium character bungalow extensions across Adelaide. We combine detailed planning, transparent communication and quality craftsmanship to create homes that respect their original architecture while supporting modern family life.
If you are considering transforming your character home, contact BTF Constructions to begin the conversation.



