Updated: Apr 20, 2026
Location and Projects
Address
2336 Alki AVE SW, Seattle, WA, 98116
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Mark Mehlhaff Company Construction
Serving clients throughout Seattle, Mark Mehlhaff Company LLC brings over three decades of experience to residential remodeling and construction projects. Founded by Mark Mehlhaff, the company specializes in custom renovation work for single-family homes, including kitchen and bathroom remodels, home additions, and whole-house updates. Project portfolios emphasize thoughtful integration of modern materials and finishes to suit the character of each property. The firm collaborates closely with homeowners to adapt existing spaces or create new living areas that reflect current trends in comfort and energy efficiency. With 36 years in the industry, Mark Mehlhaff Company LLC has completed a range of projects in Seattle neighborhoods, managing all phases from design consultation to final construction.
Mark Mehlhaff Company LLC Services
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Mark Mehlhaff Company LLC Contact Information
Phone Number: (254) 445-9360
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Address: 2336 Alki AVE SW, Seattle, WA 98116
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Mark Mehlhaff Company LLC Seattle
Quality
106
93rd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Mark Mehlhaff Company LLC has a BuildZoom score of 106, which places them above 93% of 128,670 contractors in Washington.
Activity
|
4 projects
|
2025 |
|
4 projects
|
2024 |
|
3 projects
|
2023 |
Our building permit records indicate that Mark Mehlhaff Company LLC has worked on at least
11.0 projects over the past 3 years.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Experience
|
4 projects
|
Home Additions |
|
3 projects
|
New Constructions |
Analyzing permits over the last 4 years shows that Mark Mehlhaff Company LLC mostly works on
home addition
and new construction
projects.
Pricing
|
1 project
|
< $5k |
|
1 project
|
$20k-$50k |
|
3 projects
|
$50k-$100k |
|
2 projects
|
$100k-$250k |
|
2 projects
|
$250k-$500k |
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
Building Permits by Mark Mehlhaff Company LLC
This is a sample of this contractor's permits. Click here to access their complete permit history.
Type: mechanical multifamily class: alteration to structure or system bmf24-09207 daher remodel: (2) thermostats (1) gas water heater (3) bathroom fans (1) clothes dryer exhaust (1) kitchen fan (1) laundry fan (1) whole house fan (2) heat pumps
Valuation:
N/A
Permit #:
MMF25-01054
Status:
issued
Fee:
$445
Permit Type:
N/A
Building Type:
N/A
Commercial tenant improvement - denali advanced integration - 2018 ibc - reconfiguration of first and second floor space for open office layout for the existing tenant. the project will be based on iebc alteration level 2 for work area <50% of building area. move restroom locations and modification of lobby to allow for the addition of an elevator which may be completed after occupanc... see more
Valuation:
$272,200
Permit #:
BLDG-2021-03267
Status:
final
Fee:
$5,841
Permit Type:
N/A
Building Type:
N/A
Construction of a 2325 sq ft 2-story 4 bed/3 bathroom single family residence. includes plumbing and mechanical per approved plans. **detached garage under separate permit - bldrn21-0156** **frr21-0191 (09/20/21): revisions to replace pab's not installed with footing pour.** **frr21-0238 (11/17/21): field changes in wedge anchors v anchor bolts.** **frr21-0186 (2/16/22): change wood s... see more
Valuation:
$280,000
Permit #:
BLDRN21-0029
Status:
final
Fee:
$17,129
Permit Type:
N/A
Building Type:
Single family dwe...
Chatila- remodel & addition m incl no p, single family residence remodel. 2 story "bay window" addition for new staircase 34 s.f. second floor area demo'd for open to below -150 s.f. net habitable space reduced by 116 s.f. new 228 s.f. unheated sunroom with deck above
Valuation:
N/A
Permit #:
BLD2022-0349
Status:
final
Fee:
$5,266
Permit Type:
N/A
Building Type:
N/A
Infill existing 15 x 30 swimming pool with average depth of 4 surrounded by existing concrete patio. remove existing pool curbing and then cap infilled pool with 4 concrete patio slab to match existing. no site work no landscaping no new impervious surface area. area to be used as a patio
Valuation:
N/A
Permit #:
22 104408 GD
Status:
final
Fee:
$1,295
Permit Type:
N/A
Building Type:
N/A
Total interior renovation of existing 968 sf 2 bedroom 1 bathroom single family residence involving reorganization of floor plan closing some window openings and creating some new openings. addition of full-width front porch and removal or rear porch cover. insulation and heating to meet 2018 wsec. existing sewer and water utilities to be utilized. **frr24-0084 (04/26/24): revisions t... see more
Valuation:
$83,000
Permit #:
BLDRA23-1116
Status:
final
Fee:
$4,768
Permit Type:
Addition and remodel
Building Type:
Single family dwe...
Building new 3bd/3ba 1966 sq ft single family dwelling. includes plumbing and mechanical per approved plans. (related sdev21-0219. dadu under bldrn21-0116/sdev21-0219)
Valuation:
$145,000
Permit #:
BLDRN21-0115
Status:
final
Fee:
$9,940
Permit Type:
N/A
Building Type:
Single family dwe...
Single family residence menath vanvriesland and adu , construct single family residence w attached garage and mother-in-law (mil) apartment per plans and as per conditions of approval. new sfr: 21079 se 24th street new adu: 21091 se 24th street
Valuation:
N/A
Permit #:
BLD2019-00662
Status:
final
Fee:
$6,789
Permit Type:
N/A
Building Type:
N/A
Building new 2095 sq ft two story 3 bed/2.5 bathroom single family dwelling. includes plumbing and mechanical
Valuation:
$145,000
Permit #:
BLDRN21-0113
Status:
final
Fee:
$12,781
Permit Type:
N/A
Building Type:
Single family dwe...
Type: building multifamily class: interior alteration *daher remodel: remove 2 existing interior bearing walls with glu-lam beams. rearrange some main level and upper level non-bearing walls
Valuation:
N/A
Permit #:
BMF24-09207
Status:
issued
Fee:
$2,061
Permit Type:
N/A
Building Type:
N/A
Addition 153 sq st to bedroom & 177 sq ft to deck
Valuation:
N/A
Permit #:
2503-121
Status:
complete
Fee:
$883
Permit Type:
N/A
Building Type:
N/A
Building new 2 story dadu with attached garage. (related sdev21-0411. single family dwelling under bldrn21-0115 sdev21-0219)
Valuation:
$65,000
Permit #:
BLDRN21-0116
Status:
final
Fee:
$4,225
Permit Type:
N/A
Building Type:
Single family dwe...
Detached 24'x28 garage (related to new home bldrn21-0029) **frr21-0237 approved engineers confirmation of retaining walls.**
Valuation:
$32,000
Permit #:
BLDRN21-0156
Status:
final
Fee:
$1,876
Permit Type:
N/A
Building Type:
Accessory structure
Site development for new single-family residence (bldrn21-0029) and detached garage (bldrn21-0156). includes erosion control water sewer storm and driveway approach per approved plans
Valuation:
N/A
Permit #:
SDEV21-0046
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Mark mehlhaff capping existing sewer line for demolition of house. associated demolish permit #6968242-dm
Valuation:
$350
Permit #:
6977804-SS
Status:
issued
Fee:
$375
Permit Type:
None
Building Type:
Single family/duplex
Ub associated with driveway repair 23 121046 gd
Valuation:
N/A
Permit #:
25 100095 UB
Status:
plancheck
Fee:
$493
Permit Type:
N/A
Building Type:
N/A
3402 28th avenue w remodel construct additions and substantial alterations to existing single family residence per plan
Valuation:
$200,000
Permit #:
6716615-CN
Status:
issued
Fee:
$9,953
Permit Type:
Add/alt
Building Type:
Single family/duplex
Construct new 2 story dadu with attached garage. **frr23-0281 (11.07.23): lowering the building and installing a new roof system**
Valuation:
$65,000
Permit #:
BLDRN21-0114
Status:
final
Fee:
$4,563
Permit Type:
N/A
Building Type:
Single family dwe...
Reconstruct fire damaged home to previous condition throughout the house. does not include clear and grade. does not include mechanical or plumbing. **add on electrical
Valuation:
N/A
Permit #:
17 120966 BR
Status:
final
Fee:
$5,788
Permit Type:
N/A
Building Type:
N/A
Anna vista sewer side sewer repair. onsite work only
Valuation:
N/A
Permit #:
6783564-SS
Status:
issued
Fee:
$396
Permit Type:
None
Building Type:
Multifamily
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BZ Score
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Avg Project
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BZ Score
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Avg Project
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Projects
164
BZ Score
$32.4K
Avg Project
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Projects
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Mark Mehlhaff Company LLC License info
Verified License
| License # | MARKMMC858M2 |
| Status | Active |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Mark Mehlhaff Company LLC at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | MARKMMC858M2 |
| Status | Inactive |
| City | Tukwila |
| Type | Construction Contractor, General |
| Class | Limited Liability Company |
| Business Type | Limited Liability Company |
- According to the The City of Tukwila, WA, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Mark Mehlhaff Company LLC at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | MEHLHCL957CS |
| Status | Inactive |
| State | Washington |
| Type | Construction Contractor |
| Business Type | Limited Liability Company |
- According to the Washington State Department of Labor & Industries, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Mark Mehlhaff Company LLC at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
106
BuildZoom Score
Insured
| Insurer | Security National Insurance |
| Insured up to | $2,000,000 |
Bonded
| Bonded Agent | Wesco Insurance Co |
| Bond Value | $12,000 |
21
Permits
- Building permit records show that Mark Mehlhaff Company LLC has worked on 21 permitted projects.
Mark Mehlhaff Company LLC Employees
MM
Margaret Mehlhaff
Partner/Member
MM
Mark Mehlhaff
Partner/Member
MA
Mehlhaff, Mark Alan
Partner/Member