Renovation, construction & building
questions answered.

Every renovation is priced from scope, we don't publish flat rates because they'd be misleading. Cost turns on what you're changing (cosmetic vs structural), the building's existing condition, services (electrical, plumbing, HVAC), finish quality, programme, and site access. The honest answer: send us your brief and we'll come back with a fixed quote after a free site visit.

Scope of work, existing building condition, structural changes, wet services (plumbing, drainage, HVAC), finish quality, programme length, site access, and statutory compliance work all influence the final cost. Material selection alone can shift a budget significantly, which is why an accurate quote requires a proper brief and site visit, not a phone estimate.

There is no flat per-square-metre rate, an office refresh and a full strip-and-refit can differ by an order of magnitude on the same building. The number turns on services scope (new ceilings, lighting, HVAC?), finish level, partition strategy, and whether the space is occupied during the work. We quote a fixed number after a site visit and brief.

Commercial renovation cost depends heavily on building type, services scope, and condition, retail, office, medical, food-grade, and industrial sit at very different price points. We don't estimate over the phone. Every project is scoped from drawings and a site walk-through before we issue a fixed quote.

Yes. We routinely run staged commercial renovations during business hours, with after-hours and weekend work for high-noise activities. Programme planning, dust-control screens, and clearly-zoned work areas keep operations running.

Small cosmetic projects: 2–4 weeks. Mid-scope renovations: 6–12 weeks. Full structural renovations or large commercial projects: 3–6 months. A detailed programme is included with every quote so you can plan around it.

Lock the scope early, mid-build changes are expensive. Choose finishes carefully: high-impact areas warrant premium materials; less-visible zones don't. Retain salvageable elements, and avoid moving wet services unless necessary. A good builder will flag savings without dropping standard.

Verify credentials first: CIDB grade, NHBRC enrolment, valid insurance. Then check trade references, ask for completed projects you can visit, look at recent Google and social reviews, and meet the project manager you'll deal with day-to-day. The cheapest quote is rarely the best one.

Make sure quotes are apples-to-apples: same scope, same specifications, same exclusions. Be wary of quotes far below the others, they usually omit something material. Look for line-item detail, a programme, clear payment terms, and provisional sums identified separately.

Professional contractors carry insurance, hold CIDB and NHBRC registration, work to formal contracts, manage health-and-safety on site, and have remediation obligations after handover. The risk-transfer alone justifies the premium over informal labour.

CIDB grade and NHBRC number; public-liability and contractors-all-risk insurance limits; recent comparable projects; who manages the site day-to-day; the defect-liability period; payment terms; and how they handle scope changes. If they can't answer in writing, look elsewhere.

For most public-sector and large private projects, yes, CIDB registration is mandatory. Residential new builds must be NHBRC enrolled. Smaller cosmetic work has fewer formal requirements, but using a registered contractor protects you regardless of project size.

CIDB register lookup, NHBRC verification, recent Google reviews, industry-body membership (MBA, GBCSA), project references you can phone, and a physical office address you can visit. All of those should check out before you sign.

Typically: design coordination, statutory approvals, demolition and strip-out, structural alterations, electrical and data, HVAC, plumbing, ceilings and partitions, flooring, joinery, painting, signage, and final commissioning. Banabatau delivers the full scope through a single project manager.

Yes. Phased work, after-hours scheduling, dust and noise mitigation, and clear site demarcation let us renovate while you keep trading. We've delivered multiple commercial projects without forcing tenants offsite.

Better lighting, acoustic control, modern HVAC, sensible space planning, and updated technology infrastructure measurably affect concentration, comfort, and staff retention. A renovation is also a strong signal to staff that the business is investing in them.

Activity-based zones (focus rooms, collaboration nooks, breakaway areas) instead of fixed desks; biophilic elements (plants, natural light, timber); acoustic comfort as a first-class concern; flexible meeting spaces; and energy-efficient lighting and HVAC.

Light refreshes (paint, carpets, minor reconfig) every 5–7 years; significant renovations every 10–15 years. Tenant turnover and HVAC/services life-cycles often force the timing.

Yes, most structural alterations and extensions need a building plan approved by the local municipality. Internal non-structural changes (paint, joinery, partitions) usually don't.

Yes, provided a registered structural engineer designs the new support (beam, columns, or steel work) and signs off the work. We never remove a load-bearing wall without engineer sign-off, that's both a structural and a legal requirement.

Renovation generally means restoring or refreshing existing space, finishes, fittings, services, without changing the building footprint or structure. Alteration involves structural changes: moving walls, adding rooms, extending, and requires municipal approval.

From design through to handover, a residential extension typically takes 12 months. Plan approval alone can take 4–6 months depending on the municipality. Commercial extensions are usually longer due to scale and statutory requirements.

You keep your existing location and goodwill, avoid moving costs and downtime, and adapt the building to exactly what you need. For commercial tenants, a well-planned extension is often cheaper than re-fitting a new space.

Damp patches on internal walls or ceilings, peeling paint, efflorescence (white salt deposits), mould, musty smell, blistering plaster, water stains around windows, or visible cracks on the roof or balconies. Catch it early, water damage compounds fast.

Most waterproofing systems carry a 5–10 year warranty when correctly installed. Higher-spec systems on flat roofs and basements can last 15+ years. Annual inspection extends service life significantly.

Yes, most damp and mould in South African buildings traces back to water ingress. Properly diagnosed and waterproofed envelopes (roofs, parapets, balconies, basements) stop the source. Internal ventilation also matters in chronic-condensation cases.

Roof leaks, blocked gutters, rising damp from inadequate damp-proof courses, cracked plaster, failed window seals, or condensation in poorly-ventilated spaces. Diagnosis matters, treating the symptom without the cause wastes money.

When the warranty expires, after visible deterioration, or when buying a property with no waterproofing history. Inspecting flat roofs every 2 years and parapets/balconies annually is good practice.

Yes, drywall is typically meaningfully cheaper per square metre installed than brick, faster to put up, and easier to reconfigure later. That's why it dominates commercial partitioning. The exact saving depends on board spec, framing, height, and finish, we cost it as part of any quote.

Standard office partitions: 1–3 days per 100m² depending on door openings, services, and finish. Larger commercial installations can run 1–2 weeks. Skim and paint adds another 3–5 days.

Yes, drywall is the standard for office and commercial partitioning. Acoustic-rated systems with insulation cores handle privacy needs; fire-rated and demountable systems are available for specific compliance or flexibility requirements.

Suspended ceilings designed to absorb sound, reducing reverberation in open offices, restaurants, healthcare facilities, and classrooms. Common systems include mineral-fibre tile grids and specialised acoustic baffles. Banabatau installs the full range.

It depends on use: suspended grid (mineral fibre) for typical office space, exposed services with acoustic baffles for modern industrial-feel offices, plaster-on-board for high-end finishes, and moisture-resistant boards for kitchens and bathrooms.

Turnkey means one contract, one team, one point of contact, covering design coordination, demolition, build, finishes, and handover. You hand over a brief; you take the keys to a finished space. Banabatau offers full turnkey delivery.

Owns the programme, coordinates subcontractors, manages procurement, runs site safety, handles inspections and sign-offs, controls budget and scope changes, and reports weekly. They're the single accountable person on your project.

Lock the scope before breaking ground, get all specifications signed off in writing, manage provisional sums with discipline, flag every change request with a cost implication, and report weekly so there are no end-of-project surprises.

Phased work, dust-control screens, designated material and waste routes, after-hours scheduling for noisy tasks, clear daily communication, and protection of all surrounding finishes. We treat your operational continuity as part of the brief.

Yes, as principal contractor we appoint, manage, and pay all subcontractors. You deal only with us. This is the standard arrangement for commercial and large residential projects.

Usually cheaper to renovate, unless the existing structure is severely compromised, the foundation is failing, or the change in use is so large that retrofit becomes more expensive than starting fresh. We provide a written comparison if you're undecided.

As a rule of thumb: 10–15% of property value for a cosmetic refresh; 20–30% for a substantial renovation; 40%+ for major structural work or extensions. Always add a 10–15% contingency for unforeseen conditions, especially in older buildings.

Wet services (kitchens, bathrooms, plumbing reroutes) and structural changes (walls, slabs, roofs) typically dominate the budget. Finishes and joinery are next. Demolition and statutory approvals add up faster than people expect.

Kitchens, bathrooms, energy-efficiency improvements (insulation, solar, double glazing), additional liveable area, and curb appeal (paint, landscaping, entry). For commercial property: improved HVAC, parking, security, and modern services often drive yield.

Changing scope mid-build, choosing the cheapest quote, skipping engineer sign-off on structural work, neglecting waterproofing during the build, no written contract, no contingency budget, and using unregistered labour. Any one of those can become expensive.

Start with the business case (what outcome are you buying?), then a clear brief, then design coordination, then a tendered build contract with a registered contractor. Budget for design (5–10% of build), contingency (10–15%), and approvals separately.

In most cases, all the way through. Phased work, after-hours scheduling, weekend pushes for noisy tasks, and proper site demarcation keep trade flowing. We agree the operations plan with you before site establishment.

Structural alterations and extensions require building-plan approval from the local municipality. Heritage-listed properties need additional approval. Health-and-safety files, occupancy certificates, and engineer sign-off may also apply depending on scope.

Yes, for occupied buildings we routinely work evenings and weekends for high-noise activities. Some quieter trades continue during business hours behind dust screens. We agree the schedule with you and (if relevant) the landlord.

One accountable party, one programme, one budget, single point of communication, integrated risk management, and a single warranty after handover. You avoid the coordination overhead of separately appointing designers, builders, and trades.

Look for CIDB and NHBRC registration, multi-year track records, MBA membership, and verifiable references. Banabatau operates a head office in Pretoria's Menlyn Maine, has delivered projects across Gauteng since 2017, and is registered with CIDB, NHBRC, FEM, CETA, MBA North, and GBCSA.

Yes, Johannesburg and the broader metro is part of our core Gauteng service area, managed from the Pretoria office. We deliver commercial renovations and project management across all northern suburbs and the CBD.

Yes, Pretoria is our head-office region. Most of our Gauteng work is concentrated in Pretoria, Centurion, Midrand, and the eastern suburbs.

Yes, our Somerset West office services the entire Cape Metropole, including Cape Town CBD, Atlantic Seaboard, southern suburbs, Somerset West, Paarl, and Franschhoek.

The full Banabatau service: commercial construction, renovations, residential renovations and extensions, project management, roofing and waterproofing, drywall and ceilings, managed from our Somerset Links Office Park office in Somerset West.

Yes, while our hubs are Gauteng and the Western Cape, we accept projects in other provinces on client demand, particularly larger commercial work and national rollouts for existing clients.

Partitioning cost depends on system (single- vs double-skin drywall, acoustic-rated, fire-rated, demountable), height, finish, door openings, and services routing. We price from your floor layout, drop us a sketch and we'll come back with a fixed number.

Drywall pricing is driven by board type (standard, moisture-resistant, fire-rated, acoustic), wall height, frame spec, finish (skim, paint, wallpaper), and quantity. We don't publish flat rates, every job is quoted to scope.

Waterproofing cost depends on the system specified for your situation: acrylic membranes, torch-on bitumen, liquid-applied polyurethane, and specialised basement systems all sit at different price points. After a site inspection we recommend the right system and quote it.

Commercial painting is priced on substrate condition (prep work is often a bigger cost than the paint itself), paint spec, height access requirements, area, and whether the building stays occupied during the work. We scope and quote on site.

Office renovation pricing varies too widely to publish a useful average, a paint-and-carpet refresh, a partition reconfiguration, and a full services upgrade can differ several-fold on the same square footage. We give you a fixed number after seeing the space and understanding the brief.

Extension cost depends on footprint, single- vs double-storey, services connections, foundations, finish level, and statutory approval requirements. We price extensions in full after a measure-up and design discussion, no phone estimates.

Every cost question on this page comes back to the same honest answer: pricing is project-specific. Send your brief, or call us, a free site visit and fixed-price quote typically follow within 5–7 working days. Contact us.