"I own a condo unit in Phuket — can I install solar panels?" It's one of the most common questions we get, and the honest answer is: it depends on what you own and what type of building you live in. Unlike a detached house or pool villa where the owner controls the whole roof, a condo unit sits inside a larger legal structure with shared ownership rules. Here's how it actually breaks down.
The Key Question: Who Owns the Roof?
Under Thailand's Condominium Act, the roof of a condo building is almost always classified as "common property" (ทรัพย์ส่วนกลาง) — owned jointly by every unit owner and managed by the juristic person (นิติบุคคลอาคารชุด), not by any single resident. That means an individual owner generally cannot bolt solar panels onto the shared roof without approval, even if they own the top-floor penthouse underneath it.
| Situation | Solar Possible? | Who Decides | Typical Path |
|---|---|---|---|
| Low-rise condo, you own most/all of it · คอนโดเตี้ย คุณเป็นเจ้าของส่วนใหญ่/ทั้งหมด | Often yes · มักติดได้ | You / small owner group · คุณ/กลุ่มเจ้าของ | Direct install, like a house · ติดตรง เหมือนบ้านเดี่ยว |
| Standard condo, common-property roof · คอนโดทั่วไป หลังคาส่วนกลาง | Only with approval · ต้องได้รับอนุมัติ | Juristic person + owner vote · นิติบุคคล + มติเจ้าของ | Propose at AGM, split cost or common-area use · เสนอใน AGM แบ่งจ่ายหรือใช้ส่วนกลาง |
| Penthouse with exclusive roof-deck rights · เพนท์เฮาส์มีสิทธิ์ดาดฟ้าเฉพาะ | Usually yes · มักติดได้ | You, verify title wording · คุณ (ตรวจโฉนด/ข้อบังคับ) | Check condo rules first, then install · เช็กข้อบังคับก่อน แล้วติดตั้ง |
| Individual unit, no roof access · ห้องทั่วไป ไม่มีสิทธิ์เข้าถึงหลังคา | Not on the roof · ไม่ได้บนหลังคา | N/A · ไม่มี | Balcony/wall-mounted micro-solar · โซลาร์ขนาดเล็กติดระเบียง/ผนัง |
Who can realistically install solar, by building type
Three Realistic Paths for Condo Owners
- Common-area solar: The juristic person installs a system on the shared roof to power common-area electricity (elevators, corridor lighting, pumps, parking lights). This lowers the monthly common-area fee (ค่าส่วนกลาง) for every owner and needs only committee/AGM approval — no individual unit wiring involved.
- Penthouse or top-floor exclusive roof rights: Some condo projects assign exclusive use of a roof deck or terrace to a specific top-floor unit in the condo regulations or title deed. If that applies to you, solar is usually possible with committee notification rather than a full vote.
- Balcony or small-scale solar: For units without roof access, small plug-in or balcony-mounted panels can offset a portion of a single unit's usage. Output is modest compared to a rooftop system, but it's the only option that doesn't require building-wide approval.
- You own the whole low-rise building: If you own all units in a small low-rise condo or apartment building (common with boutique rental properties in Phuket), you control the roof directly and can install a full system just like a house — this is the most straightforward case.
What You Need Before Proposing Solar to Your Juristic Person
- A clear cost-savings estimate for common-area electricity, based on the building's actual monthly usage — the committee will want real numbers before voting.
- Confirmation that the roof structure can bear the additional load — a structural check is standard practice before any rooftop installation.
- Whether the system will connect to the building's PEA grid connection point for common-area load, which usually requires PEA/MEA paperwork under the juristic person's name.
- A vote at the Annual General Meeting (AGM), since roof modifications affecting common property typically need owner approval per the Condominium Act and the building's own regulations.
Not sure which category your building falls into? We can review your situation, help you put together a cost-savings case for the juristic person or committee, and quote a system sized for common-area load or your specific unit. Book a free consultation to find out what's realistic for your building.
Frequently Asked Questions
I own a condo unit but not the roof — can I still benefit from solar?
Yes, indirectly. If the juristic person installs solar for common-area electricity, every unit owner benefits through a lower monthly common-area fee. You can propose this at the next AGM even if you're not on the committee.
Does solar reduce my individual electricity bill if I live in a condo?
Only if the system is wired directly to your unit's meter — which requires roof access rights (as with a penthouse) or a balcony/small-scale setup. A common-area system only affects the shared common-area fee, not your personal unit meter.
Who approves a solar proposal for a condo's common roof?
It generally goes through the juristic person's committee first, then to a vote at the Annual General Meeting since it affects common property. Exact approval thresholds depend on your building's own condominium regulations.
Can we install solar just for our own building if it's a small, self-managed apartment building?
Yes — if you own the whole building (common for small rental apartment buildings in Phuket), you control the roof directly and can install a system the same way as a detached house, without needing a juristic person vote.