Contact SPN
Contact SPN Soil Engineering Free quotation, reply within 24 hrs
Get advice and pricing for any of our services: soil investigation, pile testing, topographic surveying, instrumentation, structural inspection (NDT), environmental site assessment, and geotechnical/civil design. Our engineering team prepares a free quotation within 24 hours, with service nationwide.
- Free quotationPrepared and sent within 24 hours
- Send drawings / location via LINEAttach drawings, photos or a Google Maps pin right away
- Nationwide serviceOnshore, in rivers and offshore
- Certified by licensed engineersReports can be used for permit applications
Contact channels
Call, chat on LINE or email our engineering team directly. We are ready to advise and prepare a free quotation within 24 hours, with service nationwide.
SPN Soil Engineering Co., Ltd.
55/10 Moo 3, Si Sa Chorakhe Noi Subdistrict, Bang Sao Thong District, Samut Prakan 10570
Reply within 24 hrs
Send us a message
Fill in the form below and our team will get back to you as soon as possible, or send your plans via LINE @spnth to get a quotation right away.
All Services
Request a quote for any service
Choose the service you need and it will be selected in the form automatically — prepare the information listed below so our engineers can price the job more accurately and quickly.
Soil Investigation & Testing
Information to prepare
- Building layout or project location (Google Maps)
- Number of storeys and building type
- Number and depth of boreholes required, or TOR (if any)
Pile Testing
Information to prepare
- Pile type, size and length
- Design load and number of piles to test
- Required test method (PDA / Static / Seismic) and site location
Topographic Survey
Information to prepare
- Survey area extent (rai / m²) or KML file
- Purpose, e.g. design, land filling or permit application
- Required deliverable format, e.g. DWG, PDF, orthophoto
Geotechnical Instrumentation
Information to prepare
- Type and number of instruments required
- Installation depth and measuring point locations
- Reading frequency and monitoring duration
Non-destructive structural testing
Information to prepare
- Structure type and problems found (attach photos)
- Number of points or members to inspect
- Original structural drawings (if any)
Environmental site assessment
Information to prepare
- Number of observation wells or sampling points
- Parameters to analyze, or EIA requirements
- Site layout and project location
Geotechnical engineering design
Information to prepare
- Soil investigation results (if any)
- Architectural drawings, loads, or fill height / excavation depth
- Site constraints, e.g. adjacent buildings
Civil engineering design
Information to prepare
- Type of work (new design / extension / damage assessment)
- Drawings or photos of the existing structure
- Scope of work and required schedule
How it works
How to get a quotation and start work
- 1
Send job details
Call, LINE or fill in the form, with drawings/project location
- 2
Engineers assess the scope
We review the data and recommend suitable test methods and quantities
- 3
Receive a quotation
Free quotation sent within 24 hours
- 4
Schedule site work
Confirm the job and set the field work dates
- 5
Report delivery
Reports certified by licensed engineers
Service Area
Nationwide service area
Our office is in Bang Sao Thong District, Samut Prakan. Our team and equipment are ready to travel to every province, working onshore, in rivers, at sea, at dams and in industrial estates.
- Bangkok and vicinity
- Central
- East / EEC
- West
- North
- Northeast
- Southern Thailand
- River and offshore work
Frequently asked questions
Questions about contacting us, requesting a quotation, business hours and SPN Soil Engineering's service area
There are 3 ways to reach us: call 064-746-9601, chat on LINE @spnth, or fill in the form on this page, attaching your plans or project location and the number of boreholes required. Our engineering team will prepare a free quotation within 24 hours.
We provide soil investigation, soil testing and pile testing nationwide, covering Bangkok, its vicinity and the provinces, including offshore work. Our office is in Bang Sao Thong District, Samut Prakan.
For a typical residential soil investigation, drilling and sampling on site takes about 1–2 days per borehole, and the engineer-certified report is issued within about 7–14 working days, depending on the number and depth of boreholes.
The price depends on the number of boreholes, depth and site conditions. We recommend sending your project details for an accurate quotation, or see our budgeting guide in the article House soil boring prices 2026
The key information is the project location or coordinates, the type of work required, and drawings or project details such as the building layout, number of boreholes, pile type and quantity, or survey area extent. If you are unsure, send whatever you have via LINE @spnth and our engineers will help define the scope. See the service-by-service checklist of information to prepare on this page.
SPN offers 8 service categories: soil investigation and testing, pile testing, topographic surveying, instrumentation, non-destructive structural testing, environmental site assessment, geotechnical engineering design and civil engineering design. You can request a quote for any service through the same channels.
Yes. Every report is signed and certified by a civil engineer licensed by the Council of Engineers Thailand (COE), with registration number, and can be submitted with building permit applications to the relevant authorities.
Our office is open Monday–Saturday, 08:00–17:00. Outside business hours you can send a message via LINE @spnth or the form on this page, and our team will get back to you during business hours.