Specialist Class 2 Strata Remediation · Sydney-wide
Registered Class 2 Practitioner · BUP0000053  ·  Builders Licence 183266c  ·  ABN 35 118 165 147
Sydney's Class 2 Remediation Specialist

We restore, protect and future-proof strata buildings.

Precision-engineered façade, balcony, roof and waterproofing solutions — delivered safely and on schedule in occupied Class 2 residential buildings across Sydney.

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Class 2 StrataOur sole focus
Occupied BuildsResidents stay in
Zero-IncidentWHS delivery
On TimeOn budget
Trusted by owners corporations across
WoollahraPoint PiperBondi Dee WhyFairlightWollstonecraftKingsford
01 — Why Choose Us

A specialist contractor you can trust

Resident wellbeing sits at the centre of everything we do. We pair disciplined site management with transparent communication to strata committees and owners corporations throughout every project.

“

Our promise

At Coastline Building Co, we deliver flawless external refurbishments across Sydney's occupied Class 2 residential buildings. We are committed to executing every scope of works — roof, window, balcony, façade and coatings — on schedule and to the highest industry standards, with robust safety and dust-mitigation protocols that minimise disruption.

— Coastline Building Co Pty Ltd
/ 01

Masters of the live environment

We specialise in remediating occupied Class 2 residential buildings, balancing construction progress with resident comfort to deliver safe, well-managed outcomes.

/ 02

Proven technical expertise

Deep experience across every external refurbishment scope lets us identify risks early, respond efficiently to latent conditions, and execute with confidence.

/ 03

Reliable project delivery

We're known for strong programme control, consistent quality and disciplined site management that keeps complex projects moving without compromise.

/ 04

Experienced site leadership

Our site leadership team provides a professional, resident-focused experience supported by clear communication, strong coordination and high safety standards.

02 — Who We Are

Built for the
complex work

Coastline Building Co is a dedicated specialist in the high-stakes remediation and complex refurbishment of Class 2 strata assets across Sydney. Unlike generalist contractors, we partner with consultants, strata managers and owners corporations to deliver precision-engineered solutions that restore structural integrity and long-term asset value.

Specialist remedial focus

We focus on occupied-building remediation, with deep expertise in façade, balcony, roof and waterproofing systems.

Safety & compliance

Rigorous, proactive WHS protocols underpin every site, with a consistent zero-incident delivery record.

Experienced management

Senior project managers master the logistics and resident-centric demands of live, occupied environments.

Built to last

We focus obsessively on waterproofing and structural finish — building for permanence, not just patch-ups.

03 — What We Do

Comprehensive external
building upgrades

Our technical expertise spans the full scope of remediation works, executed concurrently across all elevations for maximum efficiency.

01Roof demolition & replacementWith tapered insulation systems
02Window removal & replacementHigh-performance glazed systems
03Balcony remediationHobs, doors, waterproofing & tiling
04Handrail & balustrade replacementMarine-grade stainless & glazed
05Concrete & façade repairsSpalling rectification systems
06External coatings & finishesHigh-build membrane systems

Access strategy

We deploy full-perimeter scaffold systems for safe, efficient and complete access to all elevations — supporting streamlined delivery, consistent quality control and uninterrupted progress across the building envelope.

Occupancy approach

Our staging methodology protects resident safety and maintains operational continuity throughout the works. Careful planning, containment and communication let us deliver high-impact remediation with minimal disruption.

04 — Relevant Experience

Projects across Sydney's
most demanding addresses

Every project below was completed with the building fully occupied and residents in place throughout the works.

Completed Quirang residential tower, Woollahra
01
Quirang · 6 Trelawney St, Woollahra

13-storey high-rise façade & window remediation

Coastline transformed this occupied 13-storey residential tower through a high-stakes external remediation programme, navigating the logistics of a live high-rise to deliver on schedule while prioritising occupant safety.

BuildingClass 2 Strata — 13-storey tower
Strata PlanSP 3122
ScopeAsbestos, windows, façade, services
StatusCompleted · Fully occupied
Asbestos abatement400+ windowsFaçade coatingsFire services5-yr programme
+Full scope delivered
  • Certified asbestos abatement and removal of hazardous window units
  • 400+ high-performance Vantage aluminium window systems installed via mast-climber platforms
  • Resilient façade coating systems applied for coastal protection
  • Extensive internal make-good and reinstatement works in every apartment
  • Roof-level fire-services water tank replacement completed during COVID-19, with full authority approvals and infection-control protocols
  • Ongoing rolling 5-year programme of internal concrete spalling and magnesite removal across common areas and apartments
On Time & On Budget 35 Wolseley Road, Point Piper
02
35 Wolseley Rd, Point Piper

External façade & balcony remediation

A comprehensive façade and balcony remediation for this prestigious nine-unit strata building, completed on time and within budget with all residents remaining in occupation throughout.

BuildingClass 2 Strata — 9 units (2 buildings)
ScopeExternal Façade & Balcony Remediation
Key worksBalconies · Windows · Render · Roofing
StatusCompleted · On time & on budget
Helifix retro-tiesBalcony rebuildWindow replacementRender & coatings10-yr warranties
+Full scope delivered
  • Stainless steel Helifix retro-tie wall-tie replacement across the full façade
  • Full balcony demolition and reconstruction — new concrete hobs, Ardex WPM 1000 membrane, frameless glazed balustrades (12mm toughened heat-soaked glass, 316 SS spigots)
  • Complete window replacement — Vantage AWS series double-hung and sliding windows with Comfort Plus laminated glass
  • Fire-stair windows replaced with Obeco fire-rated glass blocks (FLR -/60/-)
  • Full façade render and high-build Ardex 310 membrane coating system (300 micron DFT)
  • Concrete spalling repairs using the Fosroc Nitobond / Renderoc system
  • New Colorbond cappings and downpipes; marine-grade 316 SS balustrades and handrails throughout
  • NBN-ready coaxial cable concealment within cavity walls
  • 10-year warranties on membranes, doors, balustrades and coatings
Wolseley Road is widely regarded as Sydney's most prestigious residential address — commanding harbour views and ultra-high-end strata.
Completed 33-37 Belmont Avenue, Wollstonecraft roof
03
33–37 Belmont Ave, Wollstonecraft

Tapered-insulation Enduroflex roof membrane

A technically complex roof membrane replacement requiring precise asbestos management, installation of an engineered tapered insulation system and application of a high-performance Enduroflex membrane — delivered with the building fully occupied.

BuildingClass 2 Strata — Block A
ScopeRoof Membrane & Tapered Insulation
Key worksInsulation · Membrane · Skylights
StatusDelivered on time & on budget
Tapered PIR insulationEnduroflex membraneAsbestos removal20-yr warranty
+Full scope delivered
  • Complete ballast removal and full substrate preparation to bare concrete
  • Multi-directional tapered PIR insulation system (Enduroflex) — 30mm to 255mm thickness across two roof areas
  • DeboTack base sheet with DuO HT4 / FC180 torch-applied cap-sheet membrane system
  • New Colorbond roof cappings, skylights and stormwater drainage upgrades
  • 15-year installation warranty / 20-year membrane system warranty
  • Full building occupancy maintained throughout construction
On Time & On Budget 21-25 Woods Parade, Fairlight roof
04
21–25 Woods Parade, Fairlight

High-rise roof membrane & drainage upgrade

A structurally constrained roof where conventional grading was impossible — the engineered Enduroflex tapered insulation system was the only viable solution. Coastline delivered the full scope across main roof, lift motor room, stairwell and precast perimeter panels.

BuildingClass 2 High-Rise Strata complex
Strata PlanSP 5509
ScopeRoof, LMR & precast panel works
StatusDelivered on time & on budget
Tapered insulation3-layer membraneOverflow drainagePrecast panel works20-yr guarantee
+Full scope delivered
  • Full removal of existing sheet and liquid membrane systems
  • Engineered Enduroflex tapered PIR insulation (De Boer Silver A) — 60mm to 120mm across multi-directional fall zones
  • Three-layer De Boer membrane — DeboTack 2.5 base, DeboPlast 3 mid-layer, DuO HT 4 Firecare cap sheet
  • New reinforced concrete hobs to all door thresholds and roof perimeters
  • New overflow drainage — eight outlets installed through perimeter parapet walls
  • Rectification of façade precast panel angle supports
  • New fire-rated doors and frames with marine-grade stainless hardware
  • Precast perimeter panel coatings — Ardex WPM 270 primer + WPM 310 (300 micron DFT)
  • 20-year De Boer application guarantee
Completed 12A-14 Wilga Street, Bondi
05
12A–14 Wilga St, Bondi

Roof membrane & Lot 11 terrace remediation

A comprehensive roof membrane replacement across the main roof, stairwell and lift motor room roofs, combined with a full Lot 11 sunroom and terrace reconstruction — all completed while residents remained in occupation.

BuildingClass 2 Strata — 24 units
Strata PlanSP 4233
ConsultantsBurton Architecture · Dennis Bunt
StatusCompleted · On time & on budget
Torch-on membraneLot 11 sunroomFrameless balustradesCavity flashings15-yr warranty
+Full scope delivered
  • Full removal and replacement of roof membrane across main roof, stairwell and LMR roofs
  • Two-layer ARDEX torch-on membrane — WPM 150 base layer + WPM 185 cap sheet
  • Lot 11 sunroom deconstruction and reconstruction — new galvanised steel framing and Hebel cladding
  • Lot 11 terrace — new structural hob, RailSafe frameless glazed balustrade, Vitradual capping and new paving
  • New Vantage Magnum Series 618 anodised sliding door with Comfort Plus laminated glass
  • Cavity flashing replacement — 20kg lead flashings with Ardex RA030 sealed laps
  • New Colorbond Ultra roof capping; new GW1 aluminium stairs and rail to lift motor room
  • New fire-rated doors to stairwell and LMR with marine-grade hardware
  • 15-year membrane warranty; 10-year balustrade and Lot 11 roof warranty
A 24-unit occupied strata building with a complex Lot 11 reconstruction, multi-area roof works and full LMR/stairwell upgrade — demonstrating our capacity to manage complex, multi-trade roofing programmes in sensitive residential environments.
Two Engagements 186 Pacific Parade, Dee Why
06
186 Pacific Parade, Dee Why

Beachfront balcony remediation & post-fire rectification

Two separate engagements at the same beachfront strata — first a building-wide balcony and façade remediation, then a post-fire insurance rectification to Unit 13. This repeat engagement reflects the trust Coastline builds with owners corporations and strata managers.

BuildingClass 2 Strata — beachfront residential
Strata PlanSP 5175
ScopeBalconies, waterproofing & repaint
StatusCompleted · Fully occupied
Balcony rebuildARDEX WPM 1000Frameless glassConcrete repairsPost-fire rectification
+Full scope delivered
  • Engagement 1 — Full building remediation: balcony parapet demolition and reconstruction with 40MPa concrete hobs and N12 galvanised starter bars chemically anchored to slab
  • Marine-grade stainless steel spitter pipes with incremental projections per floor level
  • ARDEX WPM 1000 sheet membrane to all balconies — compliant to AS 4654, AS 4858 and AS 2904
  • New frameless glazed balustrades — 12mm Grade A toughened heat-soaked glass, 316 SS top rail
  • Vantage commercial framed wind breaks; 2,000 litres of concrete spalling repairs (Parchem / Fosroc systems)
  • Cavity flashing replacement with 20kg lead flashings and weep holes; full external repaint (Dulux Acraprime + Elastomeric 201)
  • Engagement 2 — Unit 13 post-fire rectification (Dec 2024): full balcony strip-out and reinstatement of ARDEX WPM 1000 to insurance-grade standard
  • New frameless glass balustrade, replacement balcony doors and wind-break glass, travertine stone floor finish, new parapet capping and apron flashing
07

Toyanakus Court — full building remediation

  • Location33 Meeks St, Kingsford NSW 2032
  • BuildingClass 2 Strata — multi-storey brick residential
  • ScopeRoof, balconies, windows, façade & coatings
  • StatusCompleted · Fully occupied throughout
33 Meeks St, Kingsford

Multi-trade external envelope remediation

A comprehensive building remedial and maintenance programme spanning a full suite of external envelope works across a multi-storey brick residential building — completed while residents remained in occupation throughout.

Roof tile replacementAsbestos eaves removalBalcony waterproofingWindow replacementBrickwork repairs
+Full scope delivered
  • Full roof tile replacement — new terracotta tiles, sarking, battens, valley gutters and ridge cappings (30-year manufacturer warranty)
  • Licensed asbestos eaves lining removal (NATA air-monitored), replaced with 9mm Villaboard
  • New Colorbond Ultra Lysaght Quad gutters, downpipes and Lysaght Novaline fascia system
  • Balcony and walkway waterproofing — Ardex WPM 155 Rapid two-coat membrane system
  • New balcony and entry doors; new aluminium balustrades — Railsafe R-D4 Classic with 316 SS fixings
  • Cavity flashing installation with 20kg lead flashings to all balcony-adjacent walls
  • Full window replacement — AWS 504 Series sliding windows, Comfort Plus Low-E glass, child restrictors
  • Brickwork repointing, Helifix stainless steel brick ties and expansion joint renewal
  • Full external coatings — Taubmans Armawall and Endure systems
A fully occupied strata building requiring concurrent roof, balcony, window and façade remediation with asbestos removal — demonstrating our capacity to manage complex, multi-trade programmes in sensitive residential environments.
05 — Client References

What owners corporations say

★★★★★
Coastline's whole way of operating — from their ethics to the quality of their work, from Nathan & Terry down to the apprentices — has been exemplary. It feels akin to a partnership due to the trust that's been developed over the years.
Transparent & honest quotingCreative problem-solving Reliable on siteQuality subcontractorsGreat with residents
Debbie Nabi Secretary, Strata Committee — SP 3122, 6 Trelawney Street, Woollahra · April 2024
★★★★★
I feel so strongly that this man and his team are above any other competitor. Coastline have provided excellent value and service at every step, without any compromise on quality.
Met deadlines despite weatherClear communication Open on budgets & variationsCalm problem-solvingZero safety incidents
Bruce Anderson Chairperson — "Bristol on Sinclair", 7–17 Sinclair Street, Wollstonecraft
06 — Get In Touch

Ready to work together?

When you engage Coastline Building Co, you're partnering with a team wholly committed to delivering the best possible outcome for your building — safely, efficiently, and to the highest standard of quality.

Proven experience

Practical knowledge and steady judgment, from start to finish.

Clear communication

You're kept informed at every stage of the project.

Quality delivery

Safe, efficient work and a high standard of workmanship.

Coastline Building Co Pty Ltd

Speak with our team

Specialist Class 2 strata remediation across Sydney.

Telephone(02) 9939 0198 Emailinfo@coastlinebuildingco.com.au Webwww.coastlinebuildingco.com.au
Head Office60 Evans St, Freshwater NSW 2096
Artarmon OfficeUnit 6, 78 Reserve Rd, Artarmon NSW 2064
Discuss your project ↗
Class 2 Practitioner BUP0000053 Builders Licence 183266c ABN 35 118 165 147