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Core field area: İstanbul Anatolian & Kocaeli corridor · Nationwide Türkiye by agreed quote
Company & Operating Model

Architect- & Engineer-Led Buying Support Based in İstanbul, Türkiye

SerSourcing is a sourcing and purchasing-support service operated by CFY Mühendislik Mim. Dan. Yapı Malz. İnş. San. ve Tic. Ltd. Şti. Our contact office is in Maltepe, İstanbul, with primary focus on steel houses, steel villas, prefabricated buildings, steel warehouses, industrial factory buildings, hangars and structural/architectural building materials.

Verified Corporate Operator & Direct Manufacturer Contracting

Operated in Maltepe, İstanbul by CFY Mühendislik Mim. Dan. Yapı Malz. İnş. San. ve Tic. Ltd. Şti.. Your goods purchase contract and product payments stay directly between your company and the selected Turkish manufacturer.

SerSourcing architectural buying-office desk in Maltepe, İstanbul with steel profile and building board samples Maltepe, İstanbul · Marmara Industrial Corridor
Multidisciplinary Buying Office: Architecture, Civil Engineering & Interior Fit-Out Structured RFQ briefs, side-by-side quote alignment and timestamped on-site verification.
€190 – €790 13 Scoped Services Published fixed EUR schedule (excl. VAT)
16 Sectors Steel, Prefab & Building Steel houses, villas, prefab homes, warehouses, hangars & panels
7 Districts Core Field Corridor Maltepe to Darıca · €0 extra local road travel
100% Direct Supplier Contracting Zero undisclosed supplier commissions
Multidisciplinary Founding Partnership · CFY

Founding Partners & Technical Leadership

SerSourcing is operated by CFY in Maltepe, İstanbul, bringing together architectural, civil engineering and interior architectural discipline for structured building-material purchasing.

İdris YAĞMAHAN

Architect · Co-Founder

Primary buyer contact leading architectural specification reviews, drawing interfaces, supplier shortlisting and scoped factory visit reporting.

Architectural Specs Factory Visits

Celalettin YAĞMAHAN

Civil Engineer · Co-Founder

Supports structural steel profile, cold-formed framing, tolerance and industrial construction-component questions across purchasing briefs and technical reviews.

Steel & Framing Technical Criteria

M. Furkan YAĞMAHAN

Interior Architect · Co-Founder

Focuses on interior boards, acoustic & surface finishes, architectural fittings, sample alignment, export packaging details and multi-supplier order coordination.

Boards & Finishes Order & Sample Flow
Operating Principles & Evidence Discipline

How SerSourcing Protects Buying Clarity in Türkiye

Every engagement separates verified facts from assumptions so international contractors, importers and project teams can approve orders with documented confidence.

Local presence for single visits or structured programmes

We help international buyers who need a technical point of contact in Türkiye to organise supplier information, visit a factory or follow an agreed purchase process. The assignment can be a single scoped check or a series of defined tasks across a multi-supplier project.

Start with the product and the buying decision

A useful sourcing brief explains more than the product name. It sets out the intended application, quantities, specifications, acceptable alternatives and commercial constraints. These details allow suppliers to respond on a comparable basis.

Our approach connects the product questions with the buyer’s next decision. Are you choosing a manufacturer, checking an existing quotation, deciding whether to release a production stage or preparing for dispatch? We scope the work around that specific decision gate.

Multidisciplinary founding perspective on building products

CFY brings together three founding partners across construction disciplines: Architect İdris YAĞMAHAN (primary buyer contact), Civil Engineer Celalettin YAĞMAHAN and Interior Architect M. Furkan YAĞMAHAN. For building-product enquiries, this supports a structured discussion of architectural drawings, cold-formed & structural steel profiles, interior boards and finishes, dimensional tolerances, system interfaces and export packaging.

Specialist engineering calculations, accredited laboratory testing and formal product certification remain separate services arranged with qualified third-party bodies when required for your project. We aim to make supplier information easier to assess: what the supplier proposes, what the documents identify, what can be observed on site and what still needs a qualified technical answer.

Representation and direct supply are clearly separated

CFY may act as a buyer-support service provider or, under a separate commercial quotation, as a seller of goods. We explain the commercial role for each assignment up front so you always know who is responsible for the service deliverables and who is responsible for the product contract.

We explain known supplier relationships and supplier-related fees before the engagement. If a new connection or fee arrangement arises during the assignment, we disclose it before recommending that supplier or asking you to make a related purchasing decision.

Evidence you can use after the visit

A visit report should help your team make a decision after the visit is over. We record the agreed scope, relevant observations, available evidence and unresolved points. If access to an area, a document or a production stage is unavailable, the report states that clearly rather than implying completion.

This is also why we discuss specialist work separately: a visual observation, a dimensional check, a laboratory test and a formal conformity assessment answer different questions.

Transparent Commercial Positioning

Two Strictly Separated Commercial Modes

Default Mode · SerSourcing

Independent Buyer-Side Sourcing & Field Verification

  • Remunerated transparently by the buyer under published fixed EUR fees.
  • Your company contracts and pays the Turkish manufacturer directly for goods.
  • No hidden markups or undisclosed third-party sales commissions.
Separate Written Track Only

Direct Supply by Operating Company (CFY) When Requested

  • Applies only when the buyer explicitly asks CFY to quote as direct seller/exporter.
  • Disclosed upfront in writing on a separate commercial quotation.
  • Never blended into neutral multi-supplier comparison tables.
01 · BUYER BRIEFDrawings & Specs• Product & revision• Quantity & country• Decision to support02 · SCOPED WORKFixed EUR Scope• Confirmed access• Agreed checklist• Written fee & role03 · EVIDENCE RECORDSeparated Sources✓ Observed on site✓ Document reviewed! Supplier-stated / Open04 · DECISIONBuyer Control• Select supplier• Request sample• Release stage
Corporate Registry & Maltepe Headquarters

Verified Legal Identity & Marmara Industrial Access

Positioned on the Asian side of İstanbul for rapid field deployment across Tuzla, Gebze, Çayırova and Darıca industrial zones, plus scheduled routes nationwide.

Corporate & Operational Identifiers

Field Verified Detail
Brand SerSourcing (sersourcing.com)
Operating Company CFY Mühendislik Mim. Dan. Yapı Malz. İnş. San. ve Tic. Ltd. Şti.
Founding Partners İdris YAĞMAHAN (Architect) · Celalettin YAĞMAHAN (Civil Engineer) · M. Furkan YAĞMAHAN (Interior Architect)
Primary Sourcing Contact İdris YAĞMAHAN — Architect & Co-Founder
Contact Office Cevizli Mah. Orhan Gazi Cad. 24/B, Maltepe, İstanbul, Türkiye
Primary GSM / WhatsApp +90 (505) 507 04 18
Office Landline (Secondary) +90 (216) 614 04 34
Tax Office & Tax ID Etimesgut VD · 2091289512
MERSİS / Trade Registry 0209128951200001 · Registry No: 436556
Core Field-Service Area Maltepe, Kartal, Pendik, Tuzla, Gebze, Çayırova, Darıca

Maltepe Head Office & Core Corridor

Cevizli Mah. Orhan Gazi Cad. 24/B, Maltepe, İstanbul, Türkiye

Core €0-Travel Field Districts:
Maltepe Kartal Pendik Tuzla Gebze Çayırova Darıca

Secondary office landline (reference only): +90 (216) 614 04 34

Transparent Model Comparison

How SerSourcing compares with commission agents, inspection-only firms and trading portals

International buyers in Türkiye typically encounter three incomplete models: commission intermediaries, post-order-only inspection firms, or resellers who hide the real manufacturer. SerSourcing combines technical sourcing, factory verification and shipment control under published fixed EUR fees.

Criteria SerSourcing (Architect & Engineer Buying Office) Commission Sourcing Agents Inspection-Only Agencies (PSI / CLS) Trading Portals & Resellers
Factory Identity & Goods Contract Open-book: you see the real manufacturer, contract directly and pay the factory directly Often masked or restricted to protect ongoing commission Cannot find or shortlist manufacturers (you must already have a PO) Hidden: portal invoices as seller and conceals the underlying plant
Fee Structure & Cost Alignment Published fixed EUR fees (€190–€3,950) — fee does not inflate when order value grows Percentage of order value — higher factory prices increase agent commission Per man-day inspection fee only; no commercial quote normalisation Undisclosed trader margin embedded inside unit product prices
CAD / BOQ & Unit Normalisation Led by Architect, Civil Engineer & Interior Architect co-founders (€/m², LME + conversion, gauge/coating) Generalist sales brokers across unrelated consumer goods Checklist-only visual inspection; no pre-contract BOQ comparison Limited to items the trader chooses to resell
On-Site Factory Audit, PSI & CLS End-to-end: pre-deposit audit (SS-VISIT €490 / SS-TECH €790), PSI (€490) and container loading (€390) Informal uncalibrated visits or outsourced without technical scope Strong on PSI/CLS, but zero pre-deposit supplier search or commercial follow-up Self-inspected by the seller (not independent buyer representation)
Multi-Supplier Consolidation & Retainer Multi-plant readiness alignment (SS-MULTI €790) & 30-day Buying Office plans (BO-15/30/55) Ad-hoc coordination tied to commission volume Single-day, single-site dispatch tickets only Bundled under opaque single-reseller invoicing
European Language Architecture Full 406-page technical architecture across 7 languages (EN, TR, DE, FR, BG, RO, IT) Typically 1–2 languages with thin landing pages Global corporate templates not tailored to Turkish industrial zones Catalogue grids with minimal technical specification depth

Commercial role disclosure: Under SerSourcing buyer representation, goods contracts and payments remain directly between you and the manufacturer, and our remuneration is the agreed fixed EUR fee. Any separate direct supply offered by CFY Mühendislik Mimarlık is always quoted explicitly as a seller offer—never mixed with representation.

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Clear Boundaries & Scope Answers

Frequently Asked Questions

SerSourcing is operated by CFY Mühendislik Mim. Dan. Yapı Malz. İnş. San. ve Tic. Ltd. Şti., registered in İstanbul with its contact office in Cevizli Mah., Maltepe.

Fixed EUR Schedule · Free Initial Scope Review

Move your Türkiye purchase forward with a defined scope

Share your product specification, drawing or Turkish supplier details to receive a clear written scope and EUR fee confirmation before work starts.

WhatsApp Sourcing Desk