A 20-metre commercial or private vessel built in Lombok typically needs around 9–14 months from contract signature to delivery, depending on material, specification and approvals. A relatively simple 20 m timber dayboat might complete toward the lower end of that range; a fully fitted steel or composite liveaboard with passenger certification often runs toward the upper end.
Overview: realistic boat build timeline in Lombok
For planning purposes, most 20 m projects in Lombok fall into these broad bands:
- Concept, specification and approvals: 6–12 weeks
- Hull and structural build: 10–22 weeks (material-dependent)
- Outfitting, systems and interiors: 10–18 weeks
- Harbour trials, Kemenhub paperwork and delivery: 4–8 weeks
The critical influence on the overall boat build timeline in Lombok is not only yard speed, but also design completeness, material choice, cashflow regularity and how quickly owners confirm variations.
For a deeper breakdown of our standard stages, review the nine stages of a Lombok boat build overview alongside this article.
Key duration drivers by hull material
The same 20 m length can mean different workloads. A simple open workboat is not comparable to a 20 m liveaboard with cabins, galley, waste management and hotel-style fit-out. Material choice has a direct impact on schedule.
| Hull material | Typical build range (months) | Structural phase (weeks) | Notes |
|---|---|---|---|
| Timber (ulin/bengkirai mix) | 9–12 months | 12–18 weeks | Fast once lofting is done; drying and fairing can extend timelines. |
| Steel | 10–14 months | 14–22 weeks | Plate cutting, welding and coating sequences are weather-sensitive. |
| Composite (GRP/epoxy) | 9–13 months | 10–18 weeks | Mould availability and lamination team size are key factors. |
These bands assume a fully fitted vessel around 20 m LOA, running with a settled specification and no major redesign once construction has started.
Stage-by-stage timeline in weeks
Below is a typical schedule outline for a 20 m vessel in Lombok. Actual dates depend on complexity, survey requirements and when decisions and payments land.
1. Concept, design and specification (3–8 weeks)
- Owner brief, intended use (charter, private, cargo, dive, passenger)
- Preliminary GA (general arrangement) and hullform confirmation
- Structural scantlings aligned with BKI rules where applicable
- Preliminary machinery selection (main engines, gensets, shaft lines)
- Budget-level costing and staged payment calendar
This phase ends once the specification is “frozen enough” to order long-lead items and start cutting material.
2. Contract, deposits and permits (3–4 weeks)
- Build contract agreed with PT Komodo Galangan Nusantara
- Initial deposit received; cashflow plan matched to milestones
- Hull number reservation and preliminary discussions with Syahbandar
- If Kemenhub passenger certification is targeted, early engagement on required arrangements (liferafts, seating, stability documentation)
Delays here often have nothing to do with the yard; they are usually related to bank processes, ownership structure and the time needed to negotiate contract clauses.
3. Hull, deck and superstructure (10–22 weeks)
This is where the project becomes visible on the slipway or in the shed.
- Timber: keel laying, frames, planking, deck beams, superstructure framing, fastenings and caulking
- Steel: plate cutting, frame assembly, shell plating, deck plating, welding, NDT where required, primary coatings
- Composite: mould preparation, gelcoat or epoxy barrier, laminate schedule, bulkheads, deck and house structures
Weather in the West Nusa Tenggara monsoon seasons can influence curing times, welding, blasting and coating windows, especially in more open workspaces.
4. Machinery, systems and basic outfitting (8–12 weeks)
- Main engine and gearbox installation, shaft alignment or sterndrive mounting
- Fuel, freshwater and black/grey water tank fabrication and installation
- Electrical backbone: distribution boards, cabling trays, main runs
- Plumbing rough-in: bilge lines, sea water, fresh water, hot water
- Steering systems, rudders, bow thrusters where specified
Sequencing matters here. For example, tanks and cable trays usually go in before interior linings, or rework will extend the schedule.
5. Interiors, joinery and finishing (8–14 weeks)
- Cabin partitions, ceilings, flooring substrates
- Built-in furniture, galley, counters and storage
- Doors, windows, hatches and deck hardware installation
- Paint systems, varnish, non-skid deck finishes and decorative details
- Final equipment: navigation suite, lighting, pumps, air-conditioning
Custom interiors with high joinery content are the single biggest influence in stretching a timeline from, for example, 10 months toward 14 months.
6. Testing, trials and documentation (4–8 weeks)
- Harbour tests on all systems, including bilge, fuel transfer and fire pumps
- Sea trials for speed, manoeuvring, vibration and noise observations
- Stability test procedures where required for passenger or cargo work
- Compilation of manuals, as-fitted drawings and equipment lists
- Support for Surat Ukur, Gross Akte and Pas Besar issuance with Syahbandar
A well-planned documentation set and early coordination with local officials usually compress this phase considerably.
Timber vs steel vs composite: schedule nuances
Timber builds
In Lombok, timber builds benefit from skilled local carpentry teams. Once the backbone is down, progress can be visually rapid. However, timber selection, seasoning and fairing must not be rushed. Caulking and coating also need dry periods, so starting a hull just before the wettest months can add weeks.
Steel builds
Steel brings more predictable scantlings and is well-suited to robust workboats and liveaboards. The main schedule risk is coatings. Surface preparation, blasting and painting are sensitive to humidity and wind. If monsoon weather closes in unexpectedly, coating windows can shrink, and the structural phase can stretch by several weeks.
Composite builds
Composite timelines depend on mould availability. A repeat build from an existing mould can save several weeks versus a one-off plug and mould creation. Lamination speed depends on resin type, cure schedules and whether vacuum-bagging is used. Interior joinery and systems are similar in duration to other materials.
How approvals and paperwork affect time
Owners aiming for commercial work in Indonesia must consider approvals from Syahbandar and Kemenhub. These regulatory steps have real calendar impact:
- Passenger layout and safety gear decisions need to be aligned before interior build-out.
- Stability documentation sometimes requires input from naval architects or classification bodies.
- Surveyor availability can be constrained in peak seasons around Lombok, Bangsal, Teluk Nara and Labuan Bajo.
Factoring an extra 2–6 weeks for inspections and document processing into your plan is prudent, particularly if the vessel is targeting passenger service.
Four factors that most often add months
1. Late design changes
Moving a bulkhead, adding cabins, changing from shaft-drive to waterjets, or revising tank arrangements once steel is cut or timber is erected will almost always add time. Rework can mean stripping out completed sections, modifying structure and then re-finishing, multiplying labour far beyond the original task.
2. Cashflow interruptions
Build contracts typically tie progress to staged payments. When instalments arrive late, suppliers cannot release engines, gensets, navigation equipment or finishing materials. Work then slows or pauses, and the crew reassigns to other projects. Even a few delayed instalments can push a realistic 10-month schedule to 12–14 months.
3. Over-specified or difficult-to-source equipment
Owners sometimes specify equipment that is uncommon in Indonesia or not easily supported in West Nusa Tenggara. Special-order items can carry long lead times. If a critical piece such as steering gear, gearboxes, gensets or navigation hardware arrives late, it can hold up commissioning and trials, extending the build by several weeks or more.
4. Weather and site logistics
Lombok’s monsoon cycles affect haul-out windows, barge movements, timber drying and painting. Swell and weather in channels around Gili Trawangan, Gili Meno, Gili Air and Senggigi can complicate launch and test schedules. Planning critical coating, launching and trial operations outside the most exposed weather periods helps avoid multi-week slippage.
Planning your own 20 m build schedule
When planning your project, it is useful to cross-check desired delivery dates with a realistic sequence of activities. A target launch aligned with a particular charter season, for example in Komodo or around Sekotong and Lembar, should be backwards-planned with margin for approvals, sea trials and crew familiarisation.
For an indicative build calendar matched to your intended specification, machinery choice and operating area, you can request a structured estimate through the build process timeline overview and then follow up directly with the yard. This helps align your expectations with seasonal conditions and yard capacity.
Budget and timeline go together
There is no fixed rule that a faster build is always more expensive, but compressing a schedule often requires additional labour, overtime or parallel work fronts. Conversely, slowing a project due to indecision or redesign can inflate cost without improving the final vessel.
An initial budget band and time band should be set together, then refined as the specification is nailed down. For indicative ranges on a 20 m project with different fit-out levels, you can review the guidance on the price and quote page and discuss details with the Build Desk.
Frequently asked questions
Can a 20 m boat be built in less than 9 months in Lombok?
Under specific conditions, a 20 m vessel might be completed in under 9 months, but this usually requires a very simple specification, existing design, straightforward approvals and uninterrupted payments. Most owners targeting commercial use, passenger carriage or higher-end accommodation should plan for a longer period to allow adequate testing and documentation.
When is the best time of year to start a 20 m build in Lombok?
Starting several months before the drier season can help align key operations such as coating, launching and sea trials with more predictable weather. However, yard capacity and design readiness matter more than the calendar alone. The most effective timing is when the specification is settled and long-lead items can be ordered immediately.
How much time should I allow for design before construction starts?
For a 20 m vessel, allowing 4–8 weeks for design, layout and specification is usually sensible. Simple workboats may need less; complex liveaboards or passenger vessels often need more. Rushing this phase tends to cause late changes once the hull is underway, which is far more disruptive to both the budget and the schedule.
Does building in timber make a 20 m project faster than steel or composite?
Timber can appear faster because hull shape emerges quickly, but caulking, fairing and finishing can absorb that apparent gain. Steel and composite often have more predictable structural schedules, especially when plate cutting or moulds are well prepared. For a 20 m vessel, the difference in overall duration between materials is usually measured in weeks, not years.
How early should I involve Kemenhub and Syahbandar in a commercial project?
For any 20 m vessel intended for commercial or passenger operations in Indonesian waters, it is prudent to consider Kemenhub and Syahbandar requirements from the initial layout phase. Early engagement reduces the risk of having to move bulkheads, adjust escape routes or change tank arrangements later, all of which can add significant time to the build.