Relocating employers and engineers in Rayong's Eastern Economic Corridor need a lawyer for reasons a beach-town rental market never sees — BOI and EEC investment promotion, petrochemical and manufacturing company setup, and work permits tied to a specific plant role. This guide covers what lawyers help with around Map Ta Phut, Amata City and Ban Chang, Koh Samet leaseholds, typical fees in Thai baht, how to tell a lawyer from a visa agent, and how to vet a firm before you commit.
Thai law is conducted in Thai, follows its own procedures, and treats foreign investment, employment and land ownership very differently from most Western systems — which matters in Rayong more than almost anywhere else on the Gulf coast, since the province anchors the Eastern Economic Corridor and most legal work here traces back to a petrochemical plant, industrial-estate lease or engineering contract rather than a beach-town property deal. A smaller number of firms sit permanently in Rayong itself; many residents and employers instead use a Bangkok or Chonburi firm with genuine BOI/EEC and employment-law experience, often working by phone, email and scheduled meetings. Below is what to hire a lawyer for, roughly what it costs in baht, and how to choose a firm you can trust. Fees are typical ranges only; always confirm a written quote and scope with the specific firm.
Rayong is the industrial core of the Eastern Economic Corridor, anchored by the Map Ta Phut petrochemical complex and the Amata City and WHA industrial estates, home to major automotive, electronics, energy and petrochemical operators including PTT Group and GC affiliates. A lawyer prepares and files the Board of Investment promotion application (tax holidays, import-duty relief, and — for BOI-promoted companies — the right to own land for the operation), incorporates the Thai entity, secures the Foreign Business Act licence where needed, and structures joint ventures with local partners so the paperwork matches the plant's actual operations.
Every foreign engineer, plant manager or technical specialist posted to Map Ta Phut, Amata City or WHA needs a Non-Immigrant B visa and a work permit tied to that specific role, filed through the Department of Employment's WP3 online system and subject to the standard four-Thai-staff-per-foreign-permit ratio (BOI-promoted companies get relief from this ratio). A lawyer handles the harder cases HR can't push through alone — quota shortfalls, a technical role that doesn't map cleanly onto the permit categories, LTR visa applications for qualifying executives and specialists, or an extension after a lapse.
Foreigners cannot own Thai land outright, so relocating engineers and executives in Ban Chang typically rent modern condos and pool villas near U-Tapao airport and the Amata City estate on standard leases, while anyone drawn to Koh Samet or the Ban Phe coastline needs a lawyer to review a leasehold structure on the villa or land — freehold land ownership isn't available to foreigners there either. A lawyer reviews corporate housing leases before a company signs on behalf of dozens of relocating staff, and runs title and zoning due diligence on any larger land deal tied to a factory or warehouse expansion near the industrial estates.
The Rayong Immigration Office, based in Map Ta Phut, serves the EEC's corporate population directly — handling 90-day reporting and extensions locally rather than requiring a trip to Bangkok or Chonburi, a real convenience for a community that includes LTR, Non-B, DTV, retirement and marriage visa holders. Lawyers step in for the cases a visa agent won't touch: work-permit-linked extensions that stall, overstay or blacklist issues, or an LTR or Non-B application that's already been refused.
Marrying a Thai partner starts with an affirmation of freedom to marry from your embassy in Bangkok, then certified translation and legalisation before registration at the district (amphur) office covering your part of Rayong. A lawyer can also draft an enforceable prenuptial agreement, which must be registered together with the marriage. Anyone holding a condo lease, a Koh Samet leasehold, company shares, a car or a Thai bank account should have a bilingual Thai will too — without one, an estate is settled under Thai intestacy law, which can leave a foreign spouse or partner without clear rights to shared assets.
Indicative ranges gathered from common corporate, employment and personal matters in and around the EEC. Government charges, certified translation and legalisation are usually extra unless a firm quotes an all-in fixed fee in writing.
| Service | Typical fee (THB) | Notes |
| Initial consultation | Free - 3,000 | Many firms serving Rayong's corporate clients offer a free intro call or meeting |
| Senior lawyer hourly rate | 3,500 - 10,000 / hr | Bangkok and Chonburi-based firms handling BOI/EEC and petrochemical work sit mid-to-upper range |
| BOI/EEC investment promotion application | 60,000 - 150,000 | Scales with the size and complexity of the plant or logistics investment |
| Thai company setup (manufacturing/petrochemical) | 35,000 - 70,000 | Plus government fees and registered capital |
| Foreign Business Act licence | 25,000 - 50,000 | Where the activity isn't already covered by BOI promotion |
| Work permit application | 15,000 - 30,000 | Often bundled with company or BOI setup for a first hire |
| Non-B, LTR, retirement, marriage or DTV visa assistance | 12,000 - 30,000 | Excludes government fees and certified translation |
| Corporate condo or apartment lease review (Ban Chang) | 6,000 - 18,000 | Per lease, or discounted for a multi-unit corporate housing block |
| Koh Samet villa leasehold review | 12,000 - 30,000 | Land-lease structuring plus title search on the underlying plot |
| Land-lease or title due diligence (industrial sites) | 30,000 - 70,000 | For land tied to a factory, warehouse or logistics expansion |
| Marriage registration support | 10,000 - 25,000 | Affirmation, translation, legalisation, amphur filing |
| Prenuptial agreement | 15,000 - 38,000 | Must be registered with the marriage to be valid |
| Thai will drafting | 10,000 - 28,000 | Bilingual will covering Thai-situated assets |
| Litigation / court representation | 60,000+ | Highly dependent on the case; commercial and employment disputes run higher |
A practising lawyer in Thailand is licensed by the Lawyers Council of Thailand. For Rayong's petrochemical and manufacturing work, favour a firm with genuine BOI/EEC and employment-law experience over a general practice — Bangkok and Chonburi firms that regularly serve Map Ta Phut, Amata City and WHA clients are common, alongside a smaller number based in Rayong itself. Confirm bar registration and ask for recent examples of similar plant or logistics engagements.
If you're relocating for a job, your employer's in-house or retained counsel represents the company, not you personally — for a work permit that's usually fine, but for anything involving a personal lease, a Koh Samet property, marriage contract or will, engage your own lawyer. The same applies if you're buying into or partnering on a Rayong-based business: don't rely solely on a lawyer recommended by the other side of the deal.
For a routine work-permit renewal or 90-day report filed at the Rayong Immigration Office in Map Ta Phut, a visa agent or your employer's HR team usually handles it fine and more cheaply. Reach for a lawyer when BOI/EEC promotion, a refused application, an employment dispute, overstay, blacklist issue, or any real legal exposure is involved.
BOI/EEC applications and company setups can run over several weeks with government-fee and translation costs on top of the legal fee — get a written quote covering the full scope before you commit, and ask specifically whether the fee is fixed or hourly. Staged payments tied to milestones (application filed, promotion certificate issued, company registered) protect you far better than a single up-front sum.
Read independent reviews, confirm the firm is Thai-registered, and be wary of anyone promising a guaranteed BOI approval timeline, an unusually cheap Koh Samet leasehold deal, or pressuring a fast wire transfer. Thailand has no Western-style notary public — ask specifically for a Notarial Services Attorney if you need documents certified for use abroad. Keep every instruction and quote in writing and hold onto official receipts.
Not always — a routine work permit tied to an established company and a straightforward role is often handled by your employer's HR team or a visa agent. Bring in a lawyer when the company is newly BOI-promoted, the four-Thai-staff quota is a problem, the role doesn't fit the standard categories, or you're applying for the LTR visa as a qualifying executive or specialist.
Generally no — foreigners and most foreign-majority companies cannot own Thai land outright. The main exception is a company holding Board of Investment promotion, which can be granted the right to own land for its promoted activity. Everyone else, including anyone buying a villa on Koh Samet, operates on registered leases. A lawyer confirms which route applies before you commit capital.
The Rayong Immigration Office is based in Map Ta Phut and handles 90-day reporting, visa extensions and re-entry permits for the province's growing EEC-driven expat population, so most residents don't need to travel to Chonburi or Bangkok for routine filings. A lawyer or visa agent can advise on which office covers your registered address.
Not the land itself — foreigners cannot own Thai land outright anywhere in the country, including Koh Samet. Foreign buyers typically use a long-term registered lease on the land (commonly up to 30 years, sometimes with renewal options) while owning the villa structure itself, or buy into a condominium development where foreign freehold ownership is legally permitted under the Condominium Act. A lawyer should review any Koh Samet lease or condo purchase before you commit.
It depends heavily on the work. Initial consultations are often free or up to about 3,000 THB, senior lawyers charge roughly 3,500-10,000 THB per hour, and fixed-fee jobs range from about 6,000-18,000 THB for a corporate lease review to 60,000-150,000 THB for a full BOI/EEC investment promotion application. Always get a written quote covering government fees and translation.
Primary and official sources are cited above. Government rules, fees and procedures in Thailand change over time and vary by office; always confirm current requirements with the relevant authority before relying on them. BAANLYY never takes paid placement in editorial content.
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Hero photo by Karola G on Pexels. General information only, not legal advice; fees, procedures and visa/BOI rules change — confirm current details with a licensed Thai lawyer and official sources.