Purpose-built for Queensland living
Beautifully considered secondary dwellings, built by a local team across the Sunshine Coast, Noosa Hinterland, Mary Valley and Gympie regions.
The secondary dwelling range
Start with the size, roofline and finish level that suit your needs. Each design is then assessed against your property, access, services and approval requirements.
Artist impressions are illustrative only. Refer to the floor plans for accurate building and room dimensions. Final colours, finishes, foundations and landscaping may vary to suit the property, approved design and selected specification.
Inclusions that make sense
Every design is specified as a complete, practical home. Standard inclusions are set by series and bedroom count, making the package clearer, faster to price and more straightforward to build.
Every C.J secondary dwelling includes
One-bedroom designs include one 5 kW living-area split system. Two-bedroom designs include one 5 kW living-area split system and one 2 kW main-bedroom split system.
One-bedroom designs include one 5 kW living-area split system. Two-bedroom designs include one 5 kW living-area split system and one 2 kW main-bedroom split system.
Essential Series
Best forRental returns, compact family living and budget-led builds
Lifestyle Series
Best forLong-term living, parents, adult children and premium rentals
Signature Series
Best forDesign-led homes, lifestyle blocks and long-term value
Outside the standard package
Each pre-designed home is offered with a complete standard specification. This keeps selections, pricing and construction clear from the outset.
Selected changesSelected changes may be considered once the site and preferred model are confirmed and will be quoted as variations.
Design changesChanges affecting the floor plan, external dimensions, roof form, window layout or structural design may require revised drafting and engineering and will be priced separately.
Separate external worksCarports, additional paths, fencing and landscaping can be quoted separately where required.
Clearer pricing from the start
Each pre-designed model is priced around its published plan and series inclusions. The property assessment then identifies any work outside the published standard assumptions and allowances.
Published model starting prices include an allowance for a standard site-classification/soil report and are based on the property being classified as M or H1, having a BAL Low rating, standard construction access, and level ground or a slight slope. Raised-on-steel-stumps pricing allows for a finished floor height of up to approximately 1 metre above ground level.
The standard package includes an allowance for up to 20 metres of town-water, sewer and stormwater connection runs from the dwelling to existing compliant connection points, together with up to 20 metres of underground electrical submains from the existing supply point.
H2, E, P or other soil classifications, higher BAL ratings, steeper sites, greater floor heights, longer service runs, pump stations, tanks, treatment systems, service upgrades and unusual site requirements are assessed and priced separately.
Final inclusions, allowances and exclusions are confirmed in the building contract and project specification.
Custom design pathway
Our pre-designed range remains the clearest and most cost-effective starting point. If your property, layout or brief calls for something different, we can coordinate a custom secondary dwelling design with our draftsman. Custom drafting, design development and construction pricing are prepared separately from the standard model range.
Discuss a custom designFrom possibility to handover
You do not need to coordinate designers, engineers, certifiers and trades yourself. We can manage the process as one connected project.
Tell us about your property, budget and goal so we can confirm whether the project is a suitable fit.
We review zoning, setbacks, access, services and the practical fit of a secondary dwelling on the property.
Move into a paid planning phase so we can invest the time needed to define the project properly.
Coordinate plans, engineering, energy requirements, certification and the required council approvals.
Manage the full build, every trade and quality control with clear communication throughout.
Complete the final walkthrough and hand over a finished dwelling ready for family, tenants or guests.
Completed Essential Series buildBuilt by C.J Carpentry & ConstructionWhy C.J Carpentry & Construction
C.J Carpentry & Construction is a locally owned building company. Connor remains directly involved from the initial site assessment and pricing through to construction and handover, giving clients one clear point of contact throughout the build.
What clients say
Clear communication, personal oversight and a tidy, respectful team matter just as much as the finished result.
“Arrived on time, communicated well and maintained a clean worksite.”
“The workmanship provided was excellent quality.”
“Connor kept us informed every step of the way.”
Frequently asked questions
Every block is different, but these are the questions that usually shape the first conversation.
Each model displays separate starting prices for slab-on-ground and raised-on-steel-stumps construction. Prices include GST and are based on the published standard site, foundation and service assumptions. Final pricing is confirmed after reviewing the property, selected model and any property-specific requirements.
Yes. The standard package includes an allowance for a standard M or H1 site-classification report, site-specific building-approval drawings for the selected standard design, structural engineering, energy assessment, private building certification, standard council document lodgement and a standard sewered plumbing-approval allowance. Planning applications, boundary relaxations, bushfire reports, unsewered wastewater approvals, specialist reports, higher BAL requirements, non-standard engineering and authority costs outside the standard allowance are assessed separately for the property.
Selected non-structural changes may be quoted as variations. Changes affecting the floor plan, external dimensions, roof form, window layout or structural design are treated as custom work and may require revised drafting and engineering. Fully custom secondary dwellings are also available.
That depends on the property, council rules, services and the intended tenancy arrangement. You should confirm the planning and legal requirements for your specific property before relying on a separate rental strategy.
Yes. We regularly build homes on galvanised steel stumps across sloping sites. The foundation solution depends on the slope, soil, access and engineering, and steeper or difficult-access blocks will generally cost more than a flat, easily accessible site.
The standard package and any published starting price are based on a BAL Low site. If the property requires a higher bushfire attack level, the materials, construction details and additional cost are assessed specifically for that site.
Our service area covers the Sunshine Coast, Noosa Hinterland, Mary Valley and Gympie regions. Submit your property address through the feasibility form and we will confirm the practical details for your site.
Not sure which design fits?
We review every enquiry personally before recommending the right next step.
Enquire