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SFA Piling Contractors

SFA Piling.For Any Ground Condition.

Sectional Flight Auger is our go-to mini piling method for extensions, new builds, and domestic work. Open bore for stable clay, grout injection for tricky ground. Compact rigs keep costs down, and the sectional design also handles low headroom when you need it.

Min Headroom
2.4m
Max Load
800kN
Open bore or Grout Low headroom Unstable ground 300mm - 450mm
24h Quotation
Fixed Pricing
£10M Insured
12yr Warranty
WHY SFA PILING

Versatile Installation. Restricted Access Ready.

Our Go-To Method for Everyday Projects

SFA is the auger-based mini piling method we use most often. Gardens, extensions, new builds - it's versatile enough for almost any domestic or commercial project. Compact rigs mean lower transport costs and less site damage, same as standard mini piling.

The real advantage is flexibility. In stable clay, we use open bore drilling. When ground is wet or unstable, we switch to grout injection - pumping concrete through the auger as we drill. And if headroom is tight, the sectional design works in spaces as low as 2.4 metres.

SFA Modular Auger Sections Being Connected

Open Bore or Grout Injection

We match the method to your ground conditions.

SFA Piling Works For...

House extensions and renovations
Rear gardens and domestic projects
New builds on most ground types
Commercial and residential developments
Low headroom sites (basements, 2.4m+)
Stable clay or unstable wet ground

Need a Complete Package?

We can include RC foundations with your piling quote.

View Foundations
SFA PILING TECHNICAL SPECS

Open Bore or Grout Injection. Up to 400kN Capacity.

150-350mm diameter piles, depths to 15m+, capacities for multi-storey extensions. Open bore for clay, grout injection for wet or unstable ground. Installed to BS EN 14199 with full documentation.

Get SFA Piling Quote
SFA Rig Operating in Low Headroom Basement Environment
Maximum Load Capacity400kN

Two Installation Methods

Open bore for stable clay - drill, withdraw, fill. Grout injection for wet or unstable ground - concrete pumped through the auger as we drill.

Compact Equipment

Smaller rigs mean lower transport costs and less site damage. Works in tight access, and the sectional design handles low headroom (2.4m+) when needed.

150-350mm, Up to 400kN

Same specs as standard mini piling. Depths to 15m+, capacities for multi-storey extensions. Installed to BS EN 14199.

12-Year Warranty

Every pile backed by our 12-year structural warranty and £10M insurance. Full pile logs and documentation for Building Control.

SFA PILING FAQ

Frequently Asked Questions

Common questions about sectional flight auger piling for low headroom and internal works.

SFA (Sectional Flight Auger) piling uses modular auger sections (1-2m lengths) instead of a single continuous auger. This allows the rig to work in spaces with low headroom - as little as 2.4 metres. The finished pile is structurally identical to a standard CFA pile.
The main difference is the auger design. CFA uses one long continuous auger requiring 8-12m headroom. SFA uses short modular sections that are added incrementally, allowing work in headroom as low as 2.4m. The resulting pile is identical - SFA is simply the solution for restricted-height sites.
With SFA piling, we can work in headroom as low as 2.4 metres. This makes it possible to install piles inside existing buildings, basements, under bridges, or below mezzanine floors. Standard CFA rigs need 8-12m+ headroom.
Yes - SFA piling is specifically designed for internal works. Our compact rigs operate in headroom from 2.4m, making them suitable for basement construction, underpinning existing structures, and internal foundation work within occupied buildings.
SFA piles can reach depths of 15 metres or more, the same as CFA piles. The modular sections are added as drilling progresses, so depth is not limited by headroom. We install to the depth required to reach competent bearing strata.
SFA piling is typically 20-40% more expensive than CFA due to slower installation (each section must be added/removed) and higher labour requirements. However, SFA is often the only viable option for low headroom sites, making cost comparison less relevant.

Have a question not listed here?

Call our team
WHY GEOVEX

We Optimize the Design. You Keep the Savings.

General engineers design the structure; we optimize the build. We simplify complex reinforcement and select the most efficient method to save you time and money.

Local Ground Knowledge

After 20 years and thousands of piles across London and Southern England, we often already know the ground conditions in your area.

Fixed Pricing

We itemise every quote so you know exactly what you're paying for. When we have all the data we need, we can fix the price completely.

Designated Project Manager

No call centres or sales teams. You'll have a named project manager who handles your job from quote to completion. We're a family business - questions get answered, not escalated.

Every Rig Type In-House

Mini, CFA, SFA, screw, steel cased - we own them all. We pick the most cost-effective method for your ground, not just the one we happen to have on the truck.

20+Years in business
12Year warranty

We explain your options, then let you decide

We'll tell you if piling isn't necessary for your project
We'll suggest alternatives if they'll save you money
We'll explain the trade-offs between different methods

Our reputation is built on repeat business and referrals. We'd rather lose a job than recommend work you don't need.

WHERE WE WORK

London & Southern England

Three offices across the region means we're genuinely local to your project - not a distant company sending rigs across the country.

1,200+
Projects Completed

Extensions, new builds, basements, underpinning, and commercial foundations across London and Southern England.

London
Fitzrovia
020 4634 5936
Southampton
Hampshire
023 9433 1836
Leatherhead
Surrey
01372 236377
Coverage Map - London and Southern England

Areas we cover:

Central LondonNorth LondonSouth LondonEast LondonWest LondonEssexRomfordChelmsfordKentDartfordMaidstoneSurreyCroydonGuildfordSussexBrightonCrawleyHampshireSouthamptonPortsmouthBerkshireReadingSloughHertfordshireWatfordSt Albans
TESTIMONIALS

Trusted by Professionals

Real feedback from homeowners, contractors, and structural engineers across London and the South.

Google4.9
Google Reviews
BT
Ben Turner

"What can I say, the team were a pleasure to deal with from start to finish. My wife and I did a fair amount of due diligence... Our experience was that they seemed to go the extra mile. A shout out to Barrie the project manager but of course not forgetting Lenny and Baz who worked tirelessly throughout. And a special thank you to Ben Crabb - right from our first conversation, you proposed options and were so helpful and informative."

AW
Andy Wigmore

"A really nice family business that we couldn't recommend more highly. We had a 14m x 11m foundation concrete slab with mini piles completed within their estimation of 4 weeks... The building inspector said he wished all his clients were up to their standards! From my many phone calls with Ben from the outset through to Ricky, Barrie and Shane (3 brothers) they are all so friendly and helpful."

KD
Karan Dixit

"What a breath of fresh air to deal with a company that exceeds all of your expectations. From my first contact with Barrie in the office to the two hardworking men, Dan and Lenny who carried out the job, I have been so impressed with their professionalism, capability and friendliness. Thank you for a job 'very well done'."

FF
Farshid Fariba

"We chose them for our extension. The sales person Ben was extremely helpful with his comments and always available to discuss matters and never missed a call back. Ricky the project manager explained what was happening throughout the procedure with phone calls and I must mention Rachel for any issues we had. Overall very good job done."

BT
Ben Turner

"What can I say, the team were a pleasure to deal with from start to finish. My wife and I did a fair amount of due diligence... Our experience was that they seemed to go the extra mile. A shout out to Barrie the project manager but of course not forgetting Lenny and Baz who worked tirelessly throughout. And a special thank you to Ben Crabb - right from our first conversation, you proposed options and were so helpful and informative."

AW
Andy Wigmore

"A really nice family business that we couldn't recommend more highly. We had a 14m x 11m foundation concrete slab with mini piles completed within their estimation of 4 weeks... The building inspector said he wished all his clients were up to their standards! From my many phone calls with Ben from the outset through to Ricky, Barrie and Shane (3 brothers) they are all so friendly and helpful."

KD
Karan Dixit

"What a breath of fresh air to deal with a company that exceeds all of your expectations. From my first contact with Barrie in the office to the two hardworking men, Dan and Lenny who carried out the job, I have been so impressed with their professionalism, capability and friendliness. Thank you for a job 'very well done'."

FF
Farshid Fariba

"We chose them for our extension. The sales person Ben was extremely helpful with his comments and always available to discuss matters and never missed a call back. Ricky the project manager explained what was happening throughout the procedure with phone calls and I must mention Rachel for any issues we had. Overall very good job done."

BT
Ben Turner

"What can I say, the team were a pleasure to deal with from start to finish. My wife and I did a fair amount of due diligence... Our experience was that they seemed to go the extra mile. A shout out to Barrie the project manager but of course not forgetting Lenny and Baz who worked tirelessly throughout. And a special thank you to Ben Crabb - right from our first conversation, you proposed options and were so helpful and informative."

AW
Andy Wigmore

"A really nice family business that we couldn't recommend more highly. We had a 14m x 11m foundation concrete slab with mini piles completed within their estimation of 4 weeks... The building inspector said he wished all his clients were up to their standards! From my many phone calls with Ben from the outset through to Ricky, Barrie and Shane (3 brothers) they are all so friendly and helpful."

KD
Karan Dixit

"What a breath of fresh air to deal with a company that exceeds all of your expectations. From my first contact with Barrie in the office to the two hardworking men, Dan and Lenny who carried out the job, I have been so impressed with their professionalism, capability and friendliness. Thank you for a job 'very well done'."

FF
Farshid Fariba

"We chose them for our extension. The sales person Ben was extremely helpful with his comments and always available to discuss matters and never missed a call back. Ricky the project manager explained what was happening throughout the procedure with phone calls and I must mention Rachel for any issues we had. Overall very good job done."

05/ACCREDITATIONS

Certified & Compliant

We adhere to the highest industry standards for safety, quality, and environmental management.

CPCS Logo

CPCS Accredited

Construction Plant Competence Scheme. Ensuring our operators meet the highest standards of safety and skill.

CHAS Logo

CHAS Premium

The Contractors Health and Safety Assessment Scheme. Demonstrating compliance with risk management standards.

Constructionline

Constructionline Gold

The UK's most connected and progressive provider of procurement and supply chain management services.

Get in Touch

Tell Us About Your Project

Send us your drawings, describe your site, or just ask a question. We'll get back to you with a proper answer - not a generic response.

We Reply the Same Day

Send an enquiry and we'll respond within working hours - usually within a few hours, not days.

Quote Within 24 Hours

Send us your drawings and we'll return a detailed quote within 24 hours - often the same day for straightforward projects.

Clear, Itemised Quote

We'll explain what's included: pile type, diameter, depth, quantities, and any optional extras. No jargon, no hidden costs.