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/* NO-JS: finished composition. R3.14 — there are no covers left to hide (the burn retired), and the entrance is gated on hkr-armed, which no-JS never stamps, so a scripting-off visitor gets the painted hero on the first frame with nothing to undo. The flame layer is pure CSS and keeps breathing: it needs no script. */ .hkr-flame-ov{ animation-play-state:running; }

A golden phoenix rising over a wall of flames

Residential Construction Craftsmanship Web Design Architecture Custom Computers Performance Data Analytics Insight 3D / Virtual Reality Immersion Consulting Strategy

Welcome to House of Kartheiser

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Based in Ottawa, Illinois, House of Kartheiser showcases the work of Mark Kartheiser — a multi-discipline designer, builder, fabricator, and data analytics consultant. This site is organized by service so you can quickly explore real project examples in construction and renovation, WordPress/Elementor sites, custom computer builds, dashboarding and spreadsheet forensics, 3D/VR modeling, and practical consulting. If you’re looking for someone who can plan, build, and deliver, use the Contact page to start the conversation.

245 Finished Projects

16 Years Building & Delivering

5 Espresso Shots A Day

Residential Construction Hands-on residential construction and renovations—from framing to finish work. FRAMINGELECTRICALPLUMBINGCARPENTRY Web Design WordPress + Elementor builds focused on speed, SEO structure, and conversion. WORDPRESSELEMENTORFIGMABRANDING Custom Computers Custom gaming PCs and workstations built for performance, stability, and longevity. GAMINGWORKSTATIONSBENCHMARKING Data Analytics Dashboards, spreadsheets, and forensic analysis that turn data into decisions. DASHBOARDSSPREADSHEETSFORENSICSREPORTING 3D / Virtual Reality 3D modeling and CAD/VR visualization to plan, prototype, and present clearly. BLENDERSKETCHUPAUTOCADVRAY Consulting Practical consulting across real estate, construction, marketing, and business planning. PLANNINGMARKETINGCONSTRUCTIONREAL ESTATE

Community charity work — projects, outreach, and support for those in need

Construction

Repairs, safety upgrades, and small build-outs that keep community spaces functional.

Web
Design

Landing pages, donation funnels, event pages, and cleanup that improves clarity and trust.

Custom
Computers

Reliable workstation builds, performance tuning, and troubleshooting for staff and volunteers.

Data
Analytics

Spreadsheets, dashboards, and KPI tracking to demonstrate impact to donors and grant reviewers.

3D / Virtual
Reality

Visualizations and space mockups to plan improvements before spending time and materials.

Consulting

Scope, priorities, and execution planning so projects stay realistic, measurable, and on-track.

Community Support

Need skilled help for a nonprofit project?

If you’re coordinating a community upgrade, event setup, fundraising push, or facility improvement, I can donate select time and deliverables to help you move faster—with real execution, not just ideas.

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